USM US Cellular Corp

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UNITED STATES CELLULAR CORPORATION

ANNUAL REPORT TO SHAREHOLDERS FOR THE YEAR ENDED DECEMBER 31, 2014
Pursuant to SEC Rule 14a-3

The following audited financial statements and certain other financial information for the year ended December 31, 2014, represent U.S. Cellular's annual report to shareholders as required by the rules and regulations of the Securities and Exchange Commission ("SEC").

The following information was filed with the SEC on February 25, 2015 as Exhibit 13 to U.S. Cellular's Annual Report on Form 10-K for the year ended December 31, 2014. Such information has not been updated or revised since the date it was originally filed with the SEC. Accordingly, you are encouraged to review such information together with any subsequent information that we have filed with the SEC and other publicly available information.

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Exhibit 13

United States Cellular Corporation and Subsidiaries

Financial Reports Contents

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United States Cellular Corporation
Management's Discussion and Analysis of Financial Condition and Results of Operations

United States Cellular Corporation ("U.S. Cellular") owns, operates and invests in wireless markets throughout the United States. U.S. Cellular is an 84%-owned subsidiary of Telephone and Data Systems, Inc. ("TDS").

The following discussion and analysis should be read in conjunction with U.S. Cellular's audited consolidated financial statements and the description of U.S. Cellular's business included in Item 1 of the U.S. Cellular Annual Report on Form 10-K ("Form 10-K") for the year ended December 31, 2014. The discussion and analysis contained herein refers to consolidated data and results of operations, unless otherwise noted.

OVERVIEW

The following is a summary of certain selected information contained in the comprehensive Management's Discussion and Analysis of Financial Condition and Results of Operations that follows. The overview does not contain all of the information that may be important. You should carefully read the entire Management's Discussion and Analysis of Financial Condition and Results of Operations and not rely solely on the overview.

In its consolidated operating markets, U.S. Cellular serves approximately 4.8 million customers in 23 states. As of December 31, 2014, U.S. Cellular's average penetration rate in its consolidated operating markets was 15.0%. U.S. Cellular operates on a customer satisfaction strategy, striving to meet or exceed customer needs by providing a comprehensive range of wireless products and services, excellent customer support, and a high-quality network. U.S. Cellular's business development strategy is to obtain interests in and access to wireless licenses in its current operating markets and in areas that are adjacent to or in close proximity to its other wireless licenses, thereby building contiguous operating market areas with strong spectrum positions. U.S. Cellular believes that the acquisition of additional licenses within its current operating markets will enhance its network capacity to meet its customers' increased demand for data services. In addition, U.S. Cellular anticipates that grouping its operations into market areas will continue to provide it with certain economies in its capital and operating costs.

Financial and operating highlights in 2014 included the following:

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Total customers were 4,760,000 at December 31, 2014, including 4,646,000 retail customers (98% of total).

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Beginning in the second quarter of 2014, U.S. Cellular expanded its offerings for equipment installment plans. In 2014, 24% of total device sales to postpaid customers were made under equipment installment plans.

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In December 2014, U.S. Cellular sold $275 million of 7.25% Unsecured Senior Notes due 2063 and will use the proceeds for general corporate purposes, including spectrum purchases and capital expenditures. See Note 11—Debt for additional details.

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In December 2014, U.S. Cellular entered into an agreement to sell 595 towers outside of its Core Markets for approximately $159 million. Concurrently, U.S. Cellular closed on the sale of 236 towers, without tenants, for $10.0 million, recorded a gain of $3.8 million to (Gain) loss on sale of business and other exit costs, net and received $7.5 million in earnest money. The closing for the remaining 359 towers, primarily with tenants, occurred in January 2015, at which time U.S. Cellular received $141.5 million in additional cash proceeds and recorded a gain of approximately $107 million.

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In December 2014, U.S. Cellular completed a license exchange primarily in Oklahoma, North Carolina and Tennessee. As a result of this transaction, a gain of $21.7 million was recorded in (Gain) loss on license sales and exchanges in the Consolidated Statement of Operations.

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In March 2014, U.S. Cellular sold the majority of its St. Louis area non-operating market license for $92.3 million. As a result of this sale, a gain of $75.8 million was recorded in (Gain) loss on license sales and exchanges in the Consolidated Statement of Operations.

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United States Cellular Corporation
Management's Discussion and Analysis of Financial Condition and Results of Operations

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In February 2014, U.S. Cellular completed a license exchange in Wisconsin. As a result of this transaction, a gain of $15.7 million was recorded in (Gain) loss on license sales and exchanges in the Consolidated Statement of Operations.

In 2014, Core Markets information is the same as Consolidated Markets information. However, because the Divestiture Transaction and the NY1 & NY2 Deconsolidation were consummated in the second quarter of 2013, the Consolidated Markets in the first six months of 2013 include information with respect to the Divestiture Markets and the NY1 & NY2 Partnerships. Accordingly, the following operating information is presented for Core Markets to permit a comparison of 2014 to 2013 excluding the Divestiture Markets and the NY1 & NY2 Partnerships. As used here, Core Markets is defined as all consolidated markets in which U.S. Cellular currently conducts business and, therefore, excludes the Divestiture Markets and the NY1 & NY2 Partnerships. Core Markets as defined also includes any other income or expenses due to U.S. Cellular's direct or indirect ownership interests in other spectrum in the Divestiture Markets which was not included in the Divestiture Transaction and other retained assets from the Divestiture Markets. See Note 6—Acquisitions, Divestitures and Exchanges and Note 8—Investments in Unconsolidated Entities in the Notes to Consolidated Financial Statements for additional information.

Highlights in the twelve months ended December 31, 2014 for Core Markets included the following:

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Retail customer net additions were 36,000 in 2014 compared to net losses of 215,000 in 2013. In the postpaid category, there were net additions of 31,000 in 2014, compared to net losses of 217,000 in 2013. Prepaid net additions were 5,000 in 2014 compared to net additions of 2,000 in 2013.

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Postpaid customers comprised approximately 93% of U.S. Cellular's retail customers as of both December 31, 2014 and December 31, 2013, respectively. The postpaid churn rate was 1.8% in 2014 and 1.7% in 2013. Postpaid churn in the first half of 2014 was adversely affected by the billing system conversion in 2013; however, it steadily improved over the course of the year and was 1.6% for the three months ended December 31, 2014. The prepaid churn rate was 6.4% in 2014 and 6.7% in 2013.

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Billed average revenue per user ("ARPU") increased to $53.49 in 2014 from $50.82 in 2013 reflecting an increase in postpaid ARPU due to increases in smartphone adoption and corresponding revenues from data products and services. Service revenue ARPU increased to $60.32 in 2014 from $57.66 in 2013 due primarily to an increase in postpaid and prepaid ARPU.

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Postpaid customers on smartphone service plans increased to 60% as of December 31, 2014 compared to 51% as of December 31, 2013. In addition, smartphones represented 81% of all handsets sold in 2014 compared to 73% in 2013.

The following financial information is presented for U.S. Cellular consolidated results:

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Retail service revenues of $3,013.0 million decreased $152.5 million year-over-year, due to a decrease of 456,000 in the average number of retail customers (including approximately 250,000 due to the reductions caused by the Divestiture Transaction and NY1 & NY2 Deconsolidation) partially offset by an increase in billed ARPU.

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Cash flows from operating activities were $172.3 million in 2014 compared to $290.9 million in 2013. At December 31, 2014, Cash and cash equivalents and Short-term investments totaled $211.5 million and the revolving credit facility provided borrowing capacity of $282.5 million.

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Total additions to Property, plant and equipment were $557.6 million, including expenditures to deploy fourth generation Long-term Evolution ("4G LTE") equipment, construct cell sites, increase capacity in existing cell sites and switches, outfit new and remodel existing retail stores, and enhance billing and other customer management related systems and platforms. Total cell sites in service decreased 11% year-over-year to 6,220 primarily as a result of the deactivation of certain cell sites in the Divestiture Markets.

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United States Cellular Corporation
Management's Discussion and Analysis of Financial Condition and Results of Operations

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Operating income (loss) decreased $290.3 million to a loss of $143.4 million in 2014 from income of $146.9 million in 2013. The gain on license sales and exchanges and the gain on sale of business and other exit costs contributed $145.8 million and $502.2 million to operating income in 2014 and 2013, respectively. Without these items, operating income (loss) improved by $66.2 million due to higher equipment revenue and lower selling, general and administrative, and depreciation, amortization and accretion expenses, which were partially offset by lower service revenues and higher cost of equipment sold.

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Net income (loss) attributable to U.S. Cellular shareholders decreased $182.9 million to a net loss of $42.8 million in 2014 compared to net income of $140.0 million in 2013, due primarily to the net impact of lower operating income, higher interest expense, and a decrease in gain on investments. Basic earnings (loss) per share and Diluted earnings (loss) per share were $(0.51) in 2014, which was $2.18 and $2.16 lower, respectively, than in 2013.

U.S. Cellular anticipates that its future results may be affected by the following factors:

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Effects of industry competition on service and equipment pricing;

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U.S. Cellular completed the migration of its customers to a new Billing and Operational Support System ("B/OSS") in the third quarter of 2013. Intermittent system outages and delayed system response times negatively impacted customer service and sales operations at certain times. System enhancements and other measures were implemented to address these issues, and customer service and sales operations response times have improved to expected levels. In addition, in the fourth quarter of 2014, U.S. Cellular entered into certain arrangements pursuant to which U.S. Cellular now outsources certain support functions for its B/OSS to a third-party vendor. B/OSS is a complex system and any future operational problems with the system, including any failure by the vendor to provide the required level of service under the outsourcing arrangements, could have adverse effects on U.S. Cellular's results of operations or cash flows;

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Impacts of selling Apple products;

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Impacts of selling devices under equipment installment plans;

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Relative ability to attract and retain customers in a competitive marketplace in a cost effective manner;

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Expanded distribution of products and services in third-party national retailers;

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The nature and rate of growth in the wireless industry, requiring U.S. Cellular to grow revenues primarily from selling additional products and services to its existing customers, increasing the number of multi-device users among its existing customers, increasing data products and services and attracting wireless customers switching from other wireless carriers;

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Continued growth in revenues and costs related to data products and services and declines in revenues from voice services;

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Rapid growth in the demand for new data devices and services which may result in increased cost of equipment sold and other operating expenses and the need for additional investment in spectrum, network capacity and enhancements;

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Further consolidation among carriers in the wireless industry, which could result in increased competition for customers and/or cause roaming revenues to decline;

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Uncertainty related to various rulemaking proceedings underway at the Federal Communications Commission ("FCC");

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The ability to negotiate satisfactory 4G LTE data roaming agreements with other wireless operators;

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In September 2014, U.S. Cellular entered into agreements to sell certain non-operating licenses ("unbuilt licenses") in exchange for receiving licenses in its operating markets and cash. These

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Management's Discussion and Analysis of Financial Condition and Results of Operations

transactions are subject to regulatory approval and are expected to close in 2015. See Note 6— Acquisitions, Divestitures and Exchanges in the Notes to the Consolidated Financial Statements for additional information related to these transactions;

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In January 2015, U.S. Cellular entered into a term loan credit agreement providing a $225.0 million senior term loan credit facility which will be used for general corporate purposes, including spectrum purchases and capital expenditures; and

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In January 2015, the FCC released the results of Auction 97. U.S. Cellular participated in Auction 97 indirectly through its limited partnership in Advantage Spectrum, L.P. See Note 13—Variable Interest Entities in the Notes to Consolidated Financial Statements for additional information.

Pro Forma Financial Information

Refer to U.S. Cellular's Form 8-K filed on February 26, 2014 for pro forma financial information related to the Divestiture Transaction and the NY1 & NY2 Deconsolidation for the three and twelve months ended December 31, 2013, as if the transactions had occurred at the beginning of the respective periods.

REGULATORY MATTERS

FCC Interoperability Order

On October 25, 2013, the FCC adopted a Report and Order and Order of Proposed Modification confirming a voluntary industry agreement on interoperability in the Lower 700 MHz spectrum band. The FCC's Report and Order laid out a roadmap for the voluntary commitments of AT&T and DISH Network Corporation ("DISH") to become fully binding. The FCC implemented the AT&T commitments in an Order adopted in the first quarter of 2014 that modified AT&T's Lower 700 MHz licenses. Pursuant to these commitments, AT&T will begin incorporating changes in its network and devices that will foster interoperability across all paired spectrum blocks in the Lower 700 MHz Band and support LTE roaming on AT&T networks for carriers with compatible Band 12 devices, consistent with the FCC's rules on roaming. AT&T will be implementing the foregoing changes in phases starting with network software enhancement taking place possibly through the third quarter of 2015 with the AT&T Band 12 device roll-out to follow. In late 2014, AT&T made filings with and reaffirmed to the FCC its commitment under this Order. In addition, the FCC has adopted changes in its technical rules for certain unpaired spectrum licensed to AT&T and DISH in the Lower 700 MHz band to enhance prospects for Lower 700 MHz interoperability. AT&T's network and devices currently interoperate across only two of the three paired blocks in the Lower 700 MHz band. U.S. Cellular's LTE deployment, carried out in conjunction with its partner, King Street Wireless, utilizes spectrum in all three of these blocks and, consequently, was not interoperable with the AT&T configuration. U.S. Cellular believes that the FCC action will broaden the ecosystem of devices available to U.S. Cellular's customers over time.

FCC Net Neutrality Proposal

Currently, internet services are subject to substantially less regulation than traditional common carrier telecommunications services under federal law and generally are not subject to state or local government regulation because they are currently classified as an "information service" by the FCC under the Communications Act. Internet services provided by wireless carriers may also be subject to less regulation than by other telecommunications companies. However, in 2009, the FCC initiated a rulemaking proceeding designed to codify its existing "Net Neutrality" principles to regulate how internet service providers manage applications and content that traverse their networks. In December 2010, the FCC adopted a net neutrality rule based on its Title I "ancillary" authority under the Communications Act. Among other things, these rules prohibited all internet providers from blocking consumers' access to lawful websites or applications that compete with the provider's voice or video telephony services, subject to reasonable network management. The rules subjected the providers of fixed but not wireless broadband internet access to a prohibition on "unreasonable discrimination" in transmitting internet

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United States Cellular Corporation
Management's Discussion and Analysis of Financial Condition and Results of Operations

traffic over their networks, subject to reasonable network management. On January 14, 2014, the U.S. Court of Appeals for the District of Columbia Circuit vacated the foregoing "anti-blocking" and "anti-discrimination" portions of the FCC's net neutrality rules. In May 2014, the FCC proposed revised rules, substantially similar to the vacated rules, except that the revised proposed rules would replace the prohibition of "unreasonable discrimination" with a prohibition on "commercially unreasonable practices." Following public comments on such rules and the urging of President Obama, in February 2015 the FCC chairman instead proposed applying "Title II" or telecommunications common carrier regulation to both fixed and wireless internet service providers to prevent "paid prioritization" of internet traffic to end users and to restrict wireless carriers from limiting the capacity of certain high volume data users to use the data network. If the FCC adopts such proposed rules, it is expected that they will be challenged in litigation. U.S. Cellular cannot predict the outcome of these proceedings.

FCC Spectrum Auction 97

In January 2015, the FCC released the results of Auction 97. U.S. Cellular participated in Auction 97 indirectly through its limited partnership interest in Advantage Spectrum L.P. See Note 13—Variable Interest Entities in the Notes to Consolidated Financial Statements for additional information.

FCC Reform Order

The Telecommunications Act authorizes and directs the FCC to establish a Universal Service Fund ("USF"), to preserve and advance universal access to telecommunications services in rural and high-cost areas of the country. All carriers with interstate and international revenues must contribute to the USF. Carriers are free to pass on the cost of such contributions to their customers. In 2014, U.S. Cellular contributed $78.9 million into the federal USF and passed on the cost of such contributions to its customers.

Telecommunications companies may be designated by states, or in some cases by the FCC, as an Eligible Telecommunications Carrier ("ETC") to receive universal service support payments if they provide specified services in "high cost" areas. U.S. Cellular has been designated as an ETC in certain states and received approximately $92.1 million in high cost support for service to high cost areas in 2014.

In 2011, the FCC released an order ("Reform Order") to: reform its universal service and intercarrier compensation mechanisms; establish a new, broadband-focused support mechanism; and propose further rules to advance reform. Pursuant to the FCC's Reform Order, U.S. Cellular's ETC support has been phased down by 40% since July 1, 2012. As provided by the Reform Order, the phase down is currently suspended and U.S. Cellular will continue to receive 60% of its baseline support until a new fund provided in the Reform Order is operational. Further proceedings including litigation may also be possible. At this time, U.S. Cellular cannot predict the net effect of further changes to the USF high cost support program under the Reform Order.

Multiple appeals of the Reform Order were consolidated and argued in the U.S. Court of Appeals for the 10^th Circuit on November 19, 2013. The court ruled in favor of the FCC and U.S. Cellular filed a Petition of Certiorari on November 25, 2014 with the United States Supreme Court. At this time, U.S. Cellular cannot predict whether the Supreme Court will accept the case or the timing or outcome of any such decision should the Court permit the appeal.

With respect to intercarrier compensation, the Reform Order provides for a reduction in the charges that U.S. Cellular pays to wireline phone companies to transport and terminate calls that originate on their networks, which will reduce U.S. Cellular's operating expenses. The reductions in intercarrier charges are to increase over the next five to ten years, further reducing U.S. Cellular's operating expenses.

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United States Cellular Corporation
Management's Discussion and Analysis of Financial Condition and Results of Operations

RESULTS OF OPERATIONS

Summary Operating Data for U.S. Cellular Consolidated Markets

Following is a table of summarized operating data for U.S. Cellular's Consolidated Markets. Consolidated Markets herein refers to markets which U.S. Cellular currently consolidates, or previously consolidated in the periods presented, and is not adjusted in prior periods presented for subsequent divestitures or deconsolidations. Unless otherwise noted, figures reported in Results of Operations are representative of consolidated results.

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United States Cellular Corporation
Management's Discussion and Analysis of Financial Condition and Results of Operations

Summary Operating Data for U.S. Cellular Core Markets

Following is a table of summarized operating data for U.S. Cellular's Core Markets. For comparability, Core Markets as presented here excludes the results of the Divestiture Markets and NY1 and NY2 Partnerships as of or for the twelve months ended December 31, 2013 and December 31, 2012.

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Management's Discussion and Analysis of Financial Condition and Results of Operations

Components of Operating Income (Loss)

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United States Cellular Corporation
Management's Discussion and Analysis of Financial Condition and Results of Operations

Operating Revenues

Service revenues

Service revenues consist primarily of: (i) charges for access, airtime, roaming, recovery of regulatory costs and value added services, including data products and services, provided to U.S. Cellular's retail customers and to end users through third party resellers ("retail service"); (ii) charges to other wireless carriers whose customers use U.S. Cellular's wireless systems when roaming; and (iii) amounts received from the Federal USF.

Retail service revenues

Retail service revenues decreased by $152.5 million, or 5%, to $3,013.0 million due primarily to a decrease in U.S. Cellular's average customer base (including the reductions caused by the Divestiture Transaction and NY1 & NY2 Deconsolidation), partially offset by an increase in billed ARPU.

In 2013, Retail service revenues decreased by $382.5 million, or 11%, to $3,165.5 million due primarily to a decrease in U.S. Cellular's average customer base (including the reductions caused by the Divestiture Transaction and NY1 & NY2 Deconsolidation) and a slight decrease in billed ARPU. In the fourth quarter of 2013, U.S. Cellular issued loyalty reward points with a value of $43.5 million as a loyalty bonus in recognition of the inconvenience experienced by customers during U.S. Cellular's billing system conversion in 2013. The value of the loyalty bonus reduced Operating revenues in the Consolidated Statement of Operations and increased Customer deposits and deferred revenues in the Consolidated Balance Sheet.

Billed ARPU increased to $53.49 in 2014 from $50.73 in 2013. This overall increase is due primarily to an increase in postpaid ARPU to $56.75 in 2014 from $54.31 in 2013 and an increase in prepaid ARPU to $34.07 in 2014 from $31.44 in 2013, reflecting an increase in smartphone penetration and corresponding revenues from data products and services, partially offset by lower monthly service billings for customers on equipment installment plans. Billed ARPU in 2013 was relatively flat compared to $50.81 in 2012. An increase in smartphone adoption and corresponding revenues from data products and services drove higher ARPU; however, this growth was offset by the special issuance of loyalty rewards points in the fourth quarter of 2013, which negatively impacted billed ARPU for the year by $0.70.

U.S. Cellular expects continued pressure on retail service revenues in the foreseeable future due to industry competition for customers and related effects on pricing of service plan offerings offset to some degree by continued adoption of smartphones and data usage. In addition, beginning in the second quarter of 2014, U.S. Cellular expanded its offerings of equipment installment plans. To the extent that customers adopt these plans, U.S. Cellular expects an increase in equipment sales revenues. However, certain of the equipment installment plans provide the customer with a reduction in the monthly access charge for the device; thus, to the extent that existing customers adopt such plans, U.S. Cellular expects a reduction in retail service revenues and ARPU.

Inbound roaming revenues

Inbound roaming revenues decreased by $39.1 million, or 15% in 2014 to $224.1 million. The decrease was due in part to a $17.6 million impact related to the Divestiture Transaction and NY1 & NY2 Deconsolidation recorded in 2013. The remaining decrease in the Core Markets was due to a decrease in rates and a decline in voice volume, partially offset by higher data usage. U.S. Cellular expects modest growth in data volume, declining voice volumes and declining rates which likely will result in declining inbound roaming revenues in the near term. Both inbound and outbound roaming rates are subject to periodic revision; further, U.S. Cellular is negotiating 4G LTE roaming rates with several carriers which could materially affect roamer revenues and expenses going forward.

Inbound roaming revenues decreased by $85.5 million, or 25% in 2013 to $263.2 million. The decrease was due primarily to lower rates ($47.9 million) and the impacts of the Divestiture Transaction and NY1 &

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Management's Discussion and Analysis of Financial Condition and Results of Operations

NY2 Deconsolidation ($37.6 million). Data volume increased year-over year but the impact of this increase was offset by the combined impacts of lower volume for voice and lower rates for both data and voice. The decline in roaming revenues was offset by a decline in roaming expense also due to lower rates.

Other revenues

Other revenues of $160.9 million in 2014 decreased by $5.2 million, or 3%, compared to 2013 due to a $14.8 million decrease in ETC support, partially offset by an increase in tower rental revenue. Tower rental revenue was $55.5 million and $45.7 million in 2014 and 2013, respectively. In 2013, Other revenues decreased by $36.1 million, or 18%, due primarily to a decrease in ETC support.

Equipment sales revenues

Equipment sales revenues include revenues from sales of wireless devices and related accessories to both new and existing customers, as well as revenues from sales of wireless devices and accessories to agents. All Equipment sales revenues are recorded net of rebates.

U.S. Cellular offers a competitive line of quality wireless devices to both new and existing customers. U.S. Cellular's customer acquisition and retention efforts include offering new wireless devices to customers at discounted prices; in addition, customers on currently offered rate plans receive loyalty reward points that may be used to purchase a new wireless device or accelerate the timing of a customer's eligibility for a wireless device upgrade at promotional pricing. U.S. Cellular also continues to sell wireless devices to agents including national retailers; this practice enables U.S. Cellular to provide better control over the quality of wireless devices sold to its customers, establish roaming preferences and earn quantity discounts from wireless device manufacturers which are passed along to agents and other retailers.

Beginning in the second quarter of 2014, U.S. Cellular expanded its offerings of equipment installment plans. To the extent that customers adopt these plans, U.S. Cellular expects an increase in equipment sales revenues. However, certain of the equipment installment plans provide the customer with a reduction in the monthly access charge for the device; thus, to the extent that existing customers adopt such plans, U.S. Cellular expects a reduction in retail service revenues and ARPU.

Equipment sales revenues increased $170.7 million, or 53%, to $494.8 million in 2014. Equipment sales revenues in 2014 include $190.4 million related to equipment installment plan sales. The increase is due primarily to an increase in average revenue per device sold (including the impact of sales under equipment installment plans) and sales of connected devices and accessories. This increase is partially offset by a decrease in the sales of other device categories, primarily the feature phone category, and the effects of the Divestiture Transaction and the NY1 & NY2 Deconsolidation.

The decrease in 2013 equipment sales revenues of $29.2 million, or 8%, to $324.1 million was driven primarily by selling fewer devices, partially due to the Divestiture Transaction. Declines in volume were offset by an increase of 12% in average revenue per device. Average revenue per wireless device sold increased due to a continued shift in customer preference to higher priced smartphones.

Operating Expenses

System operations expenses (excluding Depreciation, amortization and accretion)

System operations expenses (excluding Depreciation, amortization and accretion) include charges from telecommunications service providers for U.S. Cellular's customers' use of their facilities, costs related to local interconnection to the wireline network, charges for cell site rent and maintenance of U.S. Cellular's network, long-distance charges, outbound roaming expenses and payments to third-party data product and platform developers.

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United States Cellular Corporation
Management's Discussion and Analysis of Financial Condition and Results of Operations

System operations expenses increased $6.5 million, or 1%, to $769.9 million in 2014 and decreased $183.4 million, or 19%, to $763.4 million in 2013. Key components of the net changes in System operations expenses were as follows:

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Maintenance, utility and cell site expenses increased $26.6 million, or 8%, in 2014 and decreased $61.6 million, or 15%, in 2013. The increase in 2014 reflects higher support costs for the expanded 4G LTE network and completion of certain maintenance projects deferred from 2013, partially offset by the impacts of the Divestiture Transaction and NY1 & NY2 Deconsolidation. The decrease in 2013 is driven primarily by impacts of the Divestiture Transaction and reductions in expenses related to 3G equipment support and network costs, offset by increases in charges related to 4G LTE equipment and network costs.

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Expenses incurred when U.S. Cellular's customers used other carriers' networks while roaming increased $5.8 million, or 3%, in 2014 and decreased $64.1 million, or 27%, in 2013. The increase in 2014 is driven primarily by an increase in data roaming usage, partially offset by lower rates, lower voice usage, and the impacts of the Divestiture Transaction and NY1 & NY2 Deconsolidation. The decrease in 2013 is due primarily to lower rates for both voice and data and lower voice volume, which more than offset increased data roaming usage, as well as the impacts of the Divestiture Transaction and NY1 & NY2 Deconsolidation.

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Customer usage expenses decreased by $25.9 million, or 11%, in 2014, and $57.7 million, or 19%, in 2013. The decrease in 2014 is driven by impacts of the Divestiture Transaction and NY1 & NY2 Deconsolidation, lower volume and rates for long distance usage and lower fees for platform and content providers, partially offset by LTE migration costs. The decrease in 2013 is driven by impacts of the Divestiture Transaction and decreases in intercarrier charges as a result of the FCC's Reform Order and certain data costs, partially offset by increases due to network costs for 4G LTE.

U.S. Cellular expects system operations expenses to increase in the future to support the continued growth in cell sites and other network facilities as it continues to add capacity, enhance quality and deploy new technologies as well as to support increases in total customer usage, particularly data usage. However, these increases are expected to be offset to some extent by cost savings generated by shifting data traffic to the 4G LTE network from the 3G network.

Cost of equipment sold

Cost of equipment sold increased $193.7 million, or 19%, in 2014 and $63.1 million, or 7% in 2013. In both years, the increase was driven primarily by an increase in the average cost per wireless device sold (22% in 2014 and 33% in 2013), which more than offset the impact of selling fewer devices. Average cost per device sold increased due to general customer preference for higher priced 4G LTE smartphones and tablets. Smartphones sold as a percentage of total devices sold were 73%, 68% and 56% in 2014, 2013 and 2012, respectively. The total number of devices sold decreased by 3% and 18% in 2014 and 2013, respectively, partially due to the Divestiture Transaction.

U.S. Cellular's loss on equipment, defined as equipment sales revenues less cost of equipment sold, was $697.9 million, $674.9 million and $582.7 million for 2014, 2013 and 2012, respectively. U.S. Cellular expects loss on equipment to continue to be a significant cost in the foreseeable future as iconic data-centric wireless devices continue to increase in cost and wireless carriers continue to use device availability and pricing as a means of competitive differentiation. However, U.S. Cellular expects that sales of wireless devices under equipment installment plans and, for certain devices such as tablets, under non-subsidized plans, will offset loss on equipment to some degree.

Selling, general and administrative expenses

Selling, general and administrative expenses include salaries, commissions and expenses of field sales and retail personnel and facilities; telesales department salaries and expenses; agent commissions and

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Management's Discussion and Analysis of Financial Condition and Results of Operations

related expenses; corporate marketing and merchandise management; and advertising expenses. Selling, general and administrative expenses also include bad debts expense, costs of operating customer care centers and corporate expenses.

Selling, general and administrative expenses decreased by $85.5 million to $1,591.9 million in 2014 and by $87.5 million to $1,677.4 million in 2013. Key components of the net changes in Selling, general and administrative expenses were as follows:

2014—

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General and administrative expenses decreased by $79.7 million, or 8%, due primarily to the Divestiture Transaction and NY1 & NY2 Deconsolidation and lower consulting expenses related to the billing system conversion in the prior year.

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Selling and marketing expenses decreased by $5.7 million, or 1%, due primarily to lower agent, employee and facilities costs as a result of the Divestiture Transaction, partially offset by increases in advertising expense and commissions; higher commissions reflected increases in gross additions, renewals and accessory sales volumes.

2013—

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Selling and marketing expenses decreased by $75.7 million, or 9%, primarily from lower commission expenses, more cost-effective advertising spending and reduced employee and facilities costs as a result of the Divestiture Transaction.

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General and administrative expenses decreased by $11.8 million, or 1%, driven by corporate cost containment and reduction initiatives and reduced spending as a result of the Divestiture Transaction, offset by costs associated with launching the new billing system of $55.8 million and higher bad debts expense of $31.5 million due to higher customer accounts receivable balances resulting from billing issues experienced after the system conversion.

Depreciation, amortization and accretion

Depreciation, amortization and accretion expense decreased $197.8 million, or 25%, in 2014, due primarily to the higher amount of accelerated depreciation, amortization and accretion in the Divestiture Markets that occurred in 2013. Depreciation, amortization and accretion expense increased $195.1 million, or 32%, in 2013 due primarily to the acceleration of depreciation, amortization and accretion in the Divestiture Markets. The impact of the acceleration was $13.1 million and $158.5 million in 2014 and 2013, respectively. The accelerated depreciation, amortization and accretion in the Divestiture Markets was completed in the first quarter of 2014.

(Gain) loss on asset disposals, net

(Gain) loss on asset disposals, net was a loss of $21.5 million in 2014 and $30.6 million in 2013 due primarily to losses resulting from the write-off and disposals of certain network assets.

(Gain) loss on sale of business and other exit costs, net

(Gain) loss on sale of business and other exit costs, net was a gain of $32.8 million in 2014 and $246.8 million in 2013, both primarily related to the Divestiture Transaction. See Note 6—Acquisitions, Divestitures and Exchanges in the Notes to Consolidated Financial Statements for additional information.

(Gain) loss on license sales and exchanges

(Gain) loss on license sales and exchanges was a net gain in 2014 resulting from the sale of the St. Louis area non-operating market license and the license exchanges primarily in Wisconsin, Oklahoma, North Carolina and Tennessee. The gain in 2013 resulted from the sale of the Mississippi Valley non-operating market license for $308.0 million, which resulted in a pre-tax gain of $250.6 million. See Note 6—Acquisitions, Divestitures and Exchanges in the Notes to Consolidated Financial Statements for additional information.

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Components of Other Income (Expense)

Equity in earnings of unconsolidated entities

Equity in earnings of unconsolidated entities represents U.S. Cellular's share of net income from entities in which it has a noncontrolling interest and that are accounted for by the equity method.

U.S. Cellular's investment in the Los Angeles SMSA Limited Partnership ("LA Partnership") contributed $71.8 million, $78.4 million and $67.2 million to Equity in earnings of unconsolidated entities in 2014, 2013 and 2012, respectively.

On April 3, 2013, U.S. Cellular deconsolidated the NY1 & NY2 Partnerships and began reporting them as equity method investments in its consolidated financial statements as of that date. Equity in earnings of the NY1 & NY2 Partnerships was $29.0 million and $24.7 million in 2014 and 2013, respectively. See Note 8—Investments in Unconsolidated Entities in the Notes to Consolidated Financial Statements for additional information.

Interest and dividend income

In 2014, Interest and dividend income increased by $8.2 million due primarily to imputed interest income recognized on equipment installment plans. See Note 3—Equipment Installment Plans in the Notes to Consolidated Financial Statements for additional information.

Gain (loss) on investments

In 2013, in connection with the deconsolidation of the NY1 & NY2 Partnerships, U.S. Cellular recognized a non-cash pre-tax gain of $18.5 million.

Interest expense

In 2014, interest expense increased by $13.4 million from 2013 due primarily to a decrease in capitalized interest related to network and systems projects. Interest cost capitalized was $6.2 million and $18.4 million for 2014 and 2013, respectively. Interest expense in 2013 as compared to 2012 was relatively flat.

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Income tax expense

The effective tax rates on Income before income taxes for 2014, 2013 and 2012 were 20.1%, 43.9% and 31.2%, respectively. The following significant discrete and other items impacted income tax expense for these years:

2014—Includes tax expense of $6.4 million related to valuation allowance recorded against certain state deferred tax assets. The effective tax rate in 2014 is lower due to the effect of this item combined with the loss in 2014 in Income (loss) before income taxes.

2013—Includes tax expense of $20.4 million related to the NY1 & NY2 Deconsolidation and the Divestiture Transaction, and a tax benefit of $5.4 million resulting from statute of limitation expirations.

2012—Includes tax benefits of $12.1 million resulting from statute of limitation expirations and $5.3 million resulting from corrections relating to a prior period.

See Note 4—Income Taxes in the Notes to Consolidated Financial Statements for a discussion of income tax expense and the overall effective tax rate on Income before income taxes.

Net income (loss) attributable to noncontrolling interests, net of tax

The decrease from 2013 to 2014 is due primarily to the elimination of the noncontrolling interest as a result of the NY1 & NY2 Deconsolidation on April 3, 2013 and lower income from certain partnerships in 2014.

INFLATION

Management believes that inflation affects U.S. Cellular's business to no greater or lesser extent than the general economy.

RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS

See Note 1—Summary of Significant Accounting Policies and Recent Accounting Pronouncements in the Notes to Consolidated Financial Statements for information on recently issued accounting pronouncements.

In general, recently issued accounting pronouncements did not have and are not expected to have a significant effect on U.S. Cellular's financial condition and results of operations, except for Accounting Standards Update 2014-09, Revenue from Contracts with Customers. U.S. Cellular is evaluating the effects of adoption of this standard on its financial condition and results of operations.

LIQUIDITY AND CAPITAL RESOURCES

CASH FLOWS

U.S. Cellular operates a capital-and marketing-intensive business. U.S. Cellular utilizes cash on hand, cash from operating activities, cash proceeds from divestitures and disposition of investments, short-term credit facilities and long-term debt financing to fund its acquisitions (including licenses), construction costs, operating expenses and share repurchases. Cash flows may fluctuate from quarter to quarter and year to year due to seasonality, the timing of acquisitions and divestitures, capital expenditures and other

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factors. The table below and the following discussion summarize U.S. Cellular's cash flow activities in 2014, 2013 and 2012.

Cash Flows from Operating Activities

Cash flows from operating activities were $172.3 million in 2014 and $290.9 million in 2013. The net decrease reflected higher earnings excluding the gains recognized on the sale of businesses and the gains recognized on license sales and exchanges, which had the impact of improving cash flows from operating activities, more than offset by changes in working capital, which had the impact of decreasing cash flows from operating activities. Working capital factors which significantly decreased cash flows from operating activities included changes in accounts payable levels year-over-year as a result of timing differences related to operating expenses and device purchases. In December 2014, as part of the Tax Increase Prevention act of 2014, bonus depreciation was enacted which allowed U.S. Cellular to take certain additional deductions for depreciation resulting in a federal taxable loss in 2014. Such taxable loss will be carried back to prior tax years to refund tax amounts previously paid. Primarily as a result of this federal income tax carryback, U.S. Cellular has recorded $74.8 million of Income taxes receivable at December 31, 2014. U.S. Cellular paid income taxes of $33.3 million and $157.8 million in 2014 and 2013, respectively. In 2013, accounts receivable grew substantially due to issues resulting from the conversion to a new billing system. In 2014, the higher accounts receivable balances resulting from the billing system conversion decreased to more normal levels; however, this decrease was partially offset by increased receivables related to equipment installment plan sales which are expected to increase in the near term.

Cash flows from operating activities were $290.9 million in 2013 and $899.3 million in 2012. This decrease was due primarily to changes in accounts receivable, income tax payments (net of refunds), and inventory. The changes in accounts receivable balances were due primarily to billing delays encountered during the conversion to a new billing system in the third quarter of 2013. Net income tax payments of $157.8 million were recorded in 2013 compared to net income tax refunds of $58.6 million in 2012. The net refunds in 2012 were primarily related to a federal net operating loss in 2011 largely attributable to 100% bonus depreciation applicable to qualified capital expenditures. The change in inventory was due primarily to higher costs per unit related to 4G LTE smartphones.

Cash Flows from Investing Activities

U.S. Cellular makes substantial investments to acquire wireless licenses and properties and to construct and upgrade wireless telecommunications networks and facilities as a basis for creating long-term value for shareholders. In recent years, rapid changes in technology and new opportunities have required substantial investments in potentially revenue-enhancing and cost-reducing upgrades of U.S. Cellular's networks.

Cash used for additions to property, plant and equipment totaled $605.1 million, $717.9 million and $826.4 million in 2014, 2013 and 2012, respectively, and is reported in the Consolidated Statement of Cash Flows. Capital expenditures (i.e., additions to property, plant and equipment and system development expenditures), which include the effects of accruals and capitalized interest, totaled $557.6 million in 2014, $737.5 million in 2013 and $836.7 million in 2012. See "Capital Expenditures" below for additional information on capital expenditures.

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Cash payments for acquisitions of licenses were $38.2 million, $16.5 million and $122.7 million in 2014, 2013 and 2012, respectively.

Cash received from divestitures in 2014, 2013 and 2012 were as follows:

See Note 6—Acquisitions, Divestitures and Exchanges in the Notes to Consolidated Financial Statements for additional information related to these acquisitions and divestitures.

In 2012, U.S. Cellular invested $120.0 million in U.S. Treasury Notes. U.S. Cellular realized cash proceeds of $50.0 million, $100.0 million, and $125.0 million in 2014, 2013, and 2012, respectively, related to the maturities of its investments in U.S. Treasury Notes and corporate notes.

In 2014, cash used for investing activities includes a $60.0 million deposit made by Advantage Spectrum, L.P., a variable interest entity consolidated by U.S. Cellular, to the FCC for its participation in Auction 97. See Note 13—Variable Interest Entities in the Notes to Consolidated Financial Statements for additional information.

Cash Flows from Financing Activities

Cash flows from financing activities include proceeds from and repayments of short-term and long-term debt, dividends to shareholders, distributions to noncontrolling interests, cash used to repurchase Common Shares and cash proceeds from reissuance of Common Shares pursuant to stock-based compensation plans.

In December 2014, U.S. Cellular issued $275.0 million of 7.25% Senior Notes due 2063, and paid related debt issuance costs of $9.2 million.

On September 10, 2014, U.S. Cellular purchased licenses from Airadigm Communications, Inc. ("Airadigm"). TDS owns 100% of the common stock of Airadigm. Upon closing, Airadigm transferred to U.S. Cellular FCC spectrum licenses and certain tower assets in certain markets in Wisconsin, Iowa, Minnesota and Michigan, in consideration for $91.5 million in cash. Since both parties to this transaction are controlled by TDS, U.S. Cellular recorded the transferred assets at Airadigm's net book value of $15.2 million. The $76.3 million difference between the consideration paid and the net book value of the transferred assets was recorded as an Acquisition of licenses in common control transaction cash outflow from financing activities. See Note 6—Acquisitions, Divestitures and Exchanges in the Notes to Consolidated Financial Statements for additional information related to this transaction.

On June 25, 2013, U.S. Cellular paid a special cash dividend of $5.75 per share, for an aggregate amount of $482.3 million, to all holders of U.S. Cellular Common Shares and Series A Common Shares as of June 11, 2013. U.S. Cellular did not pay any dividends in 2014 or 2012.

Adjusted Free Cash Flow

The following table presents Adjusted free cash flow. Adjusted free cash flow is defined as Cash flows from operating activities (which includes cash outflows related to the Sprint decommissioning), as adjusted for cash proceeds from the Sprint Cost Reimbursement (which are included in Cash flows from investing activities in the Consolidated Statement of Cash Flows), less Cash used for additions to property, plant and equipment. Adjusted free cash flow is a non-GAAP financial measure which U.S. Cellular believes may be useful to investors and other users of its financial information in evaluating the

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amount of cash generated by business operations (including cash proceeds from the Sprint Cost Reimbursement), after Cash used for additions to property, plant and equipment.

See Cash flows from Operating Activities and Cash flows from Investing Activities for additional information related to the components of Adjusted free cash flow.

LIQUIDITY

U.S. Cellular believes that existing cash and investment balances, funds available under its revolving credit facility and term loan facility and expected cash flows from operating and investing activities provide substantial liquidity and financial flexibility for U.S. Cellular to meet its normal day-to-day operating needs. However, these resources may not be adequate to fund all future expenditures that the company could potentially elect to make such as acquisitions of spectrum licenses in FCC auctions and other acquisition, construction and development programs. It may be necessary from time to time to increase the size of the existing revolving credit facility, to put in place new facilities, or to obtain other forms of financing in order to fund these potential expenditures. To the extent that sufficient funds are not available to U.S. Cellular or its subsidiaries on terms or at prices acceptable to U.S. Cellular, it could require U.S. Cellular to reduce its acquisition, construction and development programs.

U.S. Cellular's profitability historically has been lower in the fourth quarter as a result of significant marketing and promotional activities during the holiday season. Additionally, U.S. Cellular expects lower cash flows from operating activities in the near term as the popularity of its equipment installment plans increases. U.S. Cellular cannot provide assurances that circumstances that could have a material adverse effect on its liquidity or capital resources will not occur. Economic conditions, changes in financial markets, U.S. Cellular financial performance and/or prospects or other factors could restrict U.S. Cellular's liquidity and availability of financing on terms and prices acceptable to U.S. Cellular, which could require U.S. Cellular to reduce its capital expenditure, acquisition or share repurchase programs. Such reductions could have a material adverse effect on U.S. Cellular's business, financial condition or results of operations.

Cash and Cash Equivalents

At December 31, 2014, U.S. Cellular's cash and cash equivalents totaled $211.5 million. Cash and cash equivalents include cash and short-term, highly liquid investments with original maturities of three months or less. The primary objective of U.S. Cellular's Cash and cash equivalents investment activities is to preserve principal. At December 31, 2014, the majority of U.S. Cellular's Cash and cash equivalents was held in bank deposit accounts and in money market funds that invest exclusively in U.S. Treasury Notes or in repurchase agreements fully collateralized by such obligations. U.S. Cellular monitors the financial viability of the money market funds and direct investments in which it invests and believes that the credit risk associated with these investments is low.

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Financing

Revolving Credit Facility

U.S. Cellular has a revolving credit facility available for general corporate purposes including spectrum purchases and capital expenditures, with a maximum borrowing capacity of $300.0 million. As of December 31, 2014, the unused capacity under this agreement was $282.5 million. The continued availability of the revolving credit facility requires U.S. Cellular to comply with certain negative and affirmative covenants, maintain certain financial ratios and make representations regarding certain matters at the time of each borrowing. The covenants also prescribe certain terms associated with intercompany loans from TDS or TDS subsidiaries to U.S. Cellular or U.S. Cellular subsidiaries. There were no intercompany loans at December 31, 2014 or 2013. U.S. Cellular believes that it was in compliance as of December 31, 2014 with all of the financial covenants and requirements set forth in its revolving credit facility.

See Note 11—Debt in the Notes to Consolidated Financial Statements for additional information regarding the revolving credit facility.

Term Loan Facility

On January 21, 2015, U.S. Cellular entered into a term loan credit facility relating to $225.0 million in debt. The term loan must be drawn in one or more advances by the six month anniversary of the date of the agreement; amounts not drawn by that time will cease to be available. Amounts repaid or prepaid under the term loan facility may not be reborrowed. The maturity date of the term loan would accelerate in the event of a change in control.

The term loan is available for general corporate purposes including spectrum purchases and capital expenditures. The term loan is unsecured except for a lien on all equity which U.S. Cellular may have in the loan administrative agent, CoBank ACB, subject to certain limitations. The continued availability of the term loan facility requires U.S. Cellular to comply with certain negative and affirmative covenants, maintain certain financial ratios and make representations regarding certain matters at the time of each borrowing, that are substantially the same as those in the U.S. Cellular revolving credit facility described above.

See Note 11—Debt in the Notes to Consolidated Financial Statements for additional information regarding the term loan facility.

Long-Term Financing

U.S. Cellular has an effective shelf registration statement on Form S-3 to issue senior or subordinated debt securities. The proceeds from any such issuance may be used for general corporate purposes, including: the possible reduction of other long-term debt, spectrum purchases, and capital expenditures; in connection with acquisition, construction and development programs; the reduction of short-term debt; for working capital; to provide additional investments in subsidiaries; or the repurchase of shares. The U.S. Cellular shelf registration statement permits U.S. Cellular to issue at any time and from time to time senior or subordinated debt securities in one or more offerings. The ability of U.S. Cellular to complete an offering pursuant to such shelf registration statement is subject to market conditions and other factors at the time.

In December 2014, U.S. Cellular sold and issued $275 million of 7.25% Senior Notes due in 2063 for general corporate purposes including spectrum purchases and capital expenditures, reducing the available amount on U.S. Cellular's shelf registration statement from $500 million to $225 million. U.S. Cellular has the authority to replenish this shelf registration statement back to $500 million.

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U.S. Cellular believes that it was in compliance as of December 31, 2014 with all financial covenants and other requirements set forth in its long-term debt indentures. U.S. Cellular has not failed to make nor does it expect to fail to make any scheduled payment of principal or interest under such indentures.

The long-term debt principal payments due for the next five years represent less than 1% of the total long-term debt obligation at December 31, 2014. Refer to Market Risk—Long-Term Debt for additional information regarding required principal payments and the weighted average interest rates related to U.S. Cellular's Long-term debt.

U.S. Cellular, at its discretion, may from time to time seek to retire or purchase its outstanding debt through cash purchases and/or exchanges for other securities, in open market purchases, privately negotiated transactions, tender offers, exchange offers or otherwise. Such repurchases or exchanges, if any, will depend on prevailing market conditions, liquidity requirements, contractual restrictions and other factors. The amounts involved may be material.

See Note 11—Debt in the Notes to Consolidated Financial Statements for additional information on Long-term financing.

Credit Rating

In certain circumstances, U.S. Cellular's interest cost on its revolving credit and term loan facilities may be subject to increase if its current credit ratings from nationally recognized credit rating agencies are lowered, and may be subject to decrease if the ratings are raised. U.S. Cellular's facilities do not cease to be available nor do the maturity dates accelerate solely as a result of a downgrade in credit rating. However, a downgrade U.S. Cellular's credit rating could adversely affect its ability to renew the facilities or obtain access to other credit facilities in the future.

In 2014, nationally recognized credit rating agencies downgraded the U.S. Cellular corporate and senior debt credit ratings. After these downgrades, U.S. Cellular is rated at sub-investment grade. U.S. Cellular's credit ratings as of December 31, 2014, and the dates such ratings were issued/re-affirmed were as follows:

Capital Expenditures

U.S. Cellular's capital expenditures for 2015 are expected to be approximately $600 million. These expenditures are expected to be for the following general purposes:

•

Expand and enhance network coverage, including providing additional capacity to accommodate increased network usage, principally data usage, by current customers;

•

Continue to deploy 4G LTE technology in certain markets;

•

Expand and enhance the retail store network; and

•

Develop and enhance office systems.

U.S. Cellular plans to finance its capital expenditures program for 2015 using primarily Cash flows from operating activities and, as necessary, existing cash balances, short-term investments, borrowings under its revolving credit agreement, term loan and/or other long-term debt.

Acquisitions, Divestitures and Exchanges

U.S. Cellular assesses its existing wireless interests on an ongoing basis with a goal of improving the competitiveness of its operations and maximizing its long-term return on investment. As part of this

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strategy, U.S. Cellular reviews attractive opportunities to acquire additional wireless operating markets and wireless spectrum. In addition, U.S. Cellular may seek to divest outright or include in exchanges for other wireless interests those interests that are not strategic to its long-term success. As a result, U.S. Cellular may be engaged from time to time in negotiations relating to the acquisition, divestiture or exchange of companies, properties or wireless spectrum. In general, U.S. Cellular may not disclose such transactions until there is a definitive agreement. See Note 6—Acquisitions, Divestitures and Exchanges in the Notes to Consolidated Financial Statements for additional information related to significant transactions, including expected pre-tax cash proceeds from such transactions in 2015.

Variable Interest Entities

U.S. Cellular consolidates certain entities because they are "variable interest entities" under accounting principles generally accepted in the United States of America ("GAAP"). See Note 13—Variable Interest Entities in the Notes to Consolidated Financial Statements for additional information related to these variable interest entities. U.S. Cellular may elect to make additional capital contributions and/or advances to these variable interest entities in future periods in order to fund their operations.

FCC Spectrum Auction 97

In January 2015, the FCC released the results of Auction 97. U.S. Cellular participated in Auction 97 indirectly through its limited partnership interest in Advantage Spectrum. Advantage Spectrum was the provisional winning bidder of 124 licenses for an aggregate bid of $338.3 million, net of its anticipated designated entity discount of 25%. On or prior to March 2, 2015, Advantage Spectrum is required to pay the FCC for its bid amount, less the initial deposit of $60.0 million, plus certain other charges totaling $2.3 million. Advantage Spectrum expects to fund this capital requirement with loans and contributions made by U.S. Cellular. U.S. Cellular plans to use a portion of the proceeds received from the issuance of its 7.25% Senior Notes and term loan facility to provide these loans and contributions to Advantage Spectrum.

Common Share Repurchase Program

In the past year, U.S. Cellular has repurchased and expects to continue to repurchase its Common Shares, subject to its repurchase program. For additional information related to the current repurchase authorization and repurchases made during 2014, 2013 and 2012, see Note 15—Common Shareholders' Equity in the Notes to Consolidated Financial Statements and Part II, Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.

Contractual and Other Obligations

At December 31, 2014, the resources required for contractual obligations were as follows:

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The table above excludes liabilities related to "unrecognized tax benefits" as defined by GAAP because U.S. Cellular is unable to predict the period of settlement of such liabilities. Such unrecognized tax benefits were $36.1 million at December 31, 2014. See Note 4—Income Taxes in the Notes to Consolidated Financial Statements for additional information on unrecognized tax benefits.

Agreements

•

On November 25, 2014, U.S. Cellular executed a Master Statement of Work and certain other documents with Amdocs Software Systems Limited ("Amdocs"), effective October 1, 2014, that inter-relate with but rearrange the structure under previous Amdocs Agreements. The agreement provides that U.S. Cellular will now outsource to Amdocs certain support functions for its Billing and Operational Support System ("B/OSS"). Such functions include application support, billing operations and some infrastructure services. The agreement has a term through September 30, 2019, subject to five one-year renewal periods at U.S. Cellular's option. The total estimated amount to be paid to Amdocs with respect to the agreement during the initial five-year term is approximately $110 million (exclusive of travel and expenses and subject to certain potential adjustments).

•

During 2013, U.S. Cellular entered into agreements with Apple to purchase certain minimum quantities of Apple iPhone products and fund marketing programs related to the Apple iPhone and iPad products over a three-year period beginning in November 2013. Based on current forecasts, U.S. Cellular estimates that the remaining contractual commitment as of December 31, 2014 under these agreements is approximately $818 million. At this time, U.S. Cellular expects to meet its contractual commitments with Apple.

Off-Balance Sheet Arrangements

U.S. Cellular had no transactions, agreements or other contractual arrangements with unconsolidated entities involving "off-balance sheet arrangements," as defined by SEC rules, that had or are reasonably likely to have a material current or future effect on its financial condition, changes in financial condition, revenues or expenses, results of operations, liquidity, capital expenditures or capital resources.

APPLICATION OF CRITICAL ACCOUNTING POLICIES AND ESTIMATES

U.S. Cellular prepares its consolidated financial statements in accordance with GAAP. U.S. Cellular's significant accounting policies are discussed in detail in Note 1—Summary of Significant Accounting Policies and Recent Accounting Pronouncements in the Notes to Consolidated Financial Statements.

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Management believes the application of the following critical accounting policies and the estimates required by such application reflect its most significant judgments and estimates used in the preparation of U.S. Cellular's consolidated financial statements. Management has discussed the development and selection of each of the following accounting policies and related estimates and disclosures with the Audit Committee of U.S. Cellular's Board of Directors.

Intangible Asset Impairment

Goodwill and licenses represent a significant component of U.S. Cellular consolidated assets. These assets are considered to be indefinite lived assets and are therefore not amortized but tested annually for impairment. U.S. Cellular performs annual impairment testing of Goodwill and Licenses, as required by GAAP, as of November 1 of each year. Significant negative events, such as changes in any of the assumptions described below as well as decreases in forecasted cash flows, could result in an impairment in future periods.

See Note 7—Intangible Assets in the Notes to Consolidated Financial Statements for information related to Goodwill and Licenses activity in 2014 and 2013.

Goodwill

Based on the results of the U.S. Cellular annual Goodwill impairment assessment performed as of November 1, 2014, the fair value of each of the reporting units exceeded their respective carrying values. Therefore, no impairment of Goodwill existed.

For purposes of impairment testing of Goodwill in 2014 and 2013, U.S. Cellular identified four reporting units based on geographic service areas.

A discounted cash flow approach was used to value each reporting unit, using value drivers and risks specific to the industry and current economic factors. The cash flow estimates incorporated assumptions that market participants would use in their estimates of fair value and may not be indicative of U.S. Cellular specific assumptions. However, the discount rate used in the analysis accounts for any additional risk a market participant might place on integrating U.S. Cellular into its operations at the level of cash flows assumed under this approach. The most significant assumptions made in this process were the revenue growth rate (shown as a compound annual growth rate in the table below), the terminal revenue growth rate, the discount rate and capital expenditures as a percentage of revenue (shown as a simple average in the table below). There are uncertainties associated with these key assumptions and potential events and/or circumstances that could have a negative effect on these key assumptions, which are described below. These assumptions were as follows:

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Provided all other assumptions remained the same, the discount rate would have to increase to a range of 11.1% to 12.5% to yield estimated fair values of reporting units that equal their respective carrying values at November 1, 2014. Further, assuming all other assumptions remained the same, the terminal growth rate assumptions would need to decrease to amounts ranging from negative 3.2% to positive 0.6% to yield estimates of fair value equal to the carrying values of the respective reporting unit at November 1, 2014.

The carrying value of each U.S. Cellular reporting unit as of November 1, 2014 and the percentage by which its estimated fair value exceeded carrying value was as follows:

Wireless Licenses

As of November 1, 2014, the estimated fair value of the licenses in each unit of accounting exceeded their carrying value. Therefore, no impairment of licenses existed. U.S. Cellular tests licenses for impairment at the level of reporting referred to as a unit of accounting. For purposes of its impairment testing of licenses as of November 1, 2014 and November 1, 2013, U.S. Cellular separated its FCC licenses into eleven units of accounting based on geographic service areas. In both 2014 and 2013, seven of the units of accounting represented geographic groupings of licenses which, because they were not being utilized and, therefore, were not expected to generate cash flows from operating activities in the foreseeable future, were considered separate units of accounting for purposes of impairment testing.

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Developed operating market licenses ("built licenses")

U.S. Cellular applies the build-out method to estimate the fair values of built licenses. The most significant assumptions applied for purposes of the licenses impairment assessment were as follows:

As of November 1, 2014, the fair values of the built licenses units of accounting exceeded their respective carrying values by amounts ranging from 12.8% to 42.9%. The discount rate would have to increase to a range of 9.0% to 9.3% to yield estimated fair values of licenses in the respective units of accounting that equal their respective carrying values at November 1, 2014.

Non-operating market licenses ("unbuilt licenses")

For purposes of performing impairment testing of unbuilt licenses, the fair value of the unbuilt licenses is assumed to have changed by the same percentage, and in the same direction, that the fair value of built licenses measured using the build-out method changed during the period. There was no impairment loss recognized related to unbuilt licenses as a result of the November 1, 2014 licenses impairment test.

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Carrying Value of Licenses

The carrying value of licenses at November 1, 2014 was as follows:

Income Taxes

U.S. Cellular is included in a consolidated federal income tax return with other members of the TDS consolidated group. TDS and U.S. Cellular are parties to a Tax Allocation Agreement which provides that U.S. Cellular and its subsidiaries be included with the TDS affiliated group in a consolidated federal income tax return and in state income or franchise tax returns in certain situations. For financial statement purposes, U.S. Cellular and its subsidiaries calculate their income, income tax and credits as if they comprised a separate affiliated group. Under the Tax Allocation Agreement, U.S. Cellular remits its applicable income tax payments to TDS.

The amounts of income tax assets and liabilities, the related income tax provision and the amount of unrecognized tax benefits are critical accounting estimates because such amounts are significant to U.S. Cellular's financial condition and results of operations.

The preparation of the consolidated financial statements requires U.S. Cellular to calculate a provision for income taxes. This process involves estimating the actual current income tax liability together with assessing temporary differences resulting from the different treatment of items for tax purposes. These temporary differences result in deferred income tax assets and liabilities, which are included in U.S. Cellular's Consolidated Balance Sheet. U.S. Cellular must then assess the likelihood that deferred

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income tax assets will be realized based on future taxable income and, to the extent management believes that realization is not likely, establish a valuation allowance. Management's judgment is required in determining the provision for income taxes, deferred income tax assets and liabilities and any valuation allowance that is established for deferred income tax assets.

U.S. Cellular recognizes the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the financial statements from such a position are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate resolution.

See Note 4—Income Taxes in the Notes to Consolidated Financial Statements for details regarding U.S. Cellular's income tax provision, deferred income taxes and liabilities, valuation allowances and unrecognized tax benefits, including information regarding estimates that impact income taxes.

Loyalty Reward Program

See the Revenue Recognition section of Note 1—Summary of Significant Accounting Policies and Recent Accounting Pronouncements in the Notes to Consolidated Financial Statements for additional description of this program and the related accounting.

U.S. Cellular follows the deferred revenue method of accounting for its loyalty reward program. Under this method, revenue allocated to loyalty reward points is deferred. The amount allocated to the loyalty points is based on the estimated retail price of the products and services for which points may be redeemed, as well as U.S. Cellular's estimate of the percentage of loyalty points that will be redeemed for each product or service. A significant change in any of the aforementioned assumptions used would impact the amount of revenue deferred and recognized under the loyalty reward program.

Revenue is recognized at the time of customer redemption or when such points have been depleted via an account maintenance charge. As a result of the accumulation of historical experience, beginning in the fourth quarter of 2013, U.S. Cellular began recognizing breakage under the proportional model. Prior to the fourth quarter of 2013, breakage was not recognized until incurred. Under the proportional model, U.S. Cellular allocates a portion of the estimated future breakage to each redemption and records revenue proportionally.

U.S. Cellular periodically reviews and if necessary, revises the redemption and depletion rates under this model as appropriate based on history and related future expectations. In 2014 and 2013, U.S. Cellular recognized $20.6 million and $16.8 million, respectively, in revenues related to estimated and actual breakage.

Equipment Installment Plans

U.S. Cellular offers customers the option to purchase certain devices under installment contracts over a period of up to 24 months and, under certain of these plans, offers the customer a trade-in right. Customers on an installment contract that elect to trade-in their device, will receive a credit in the amount of the outstanding balance of the installment contract, provided the subscriber trades-in an eligible used device in good working condition and purchases a new device from U.S. Cellular. Equipment revenue under these contracts is recognized at the time the device is delivered to the end-user customer for the selling price of the device, net of any deferred imputed interest or trade-in right, if applicable.

Trade-In Right

U.S. Cellular values the trade-in right as a guarantee liability. This liability is initially measured at fair value and is determined based on assumptions including the probability and timing of the customer upgrading to a new device and the estimated fair value of the used device eligible for trade-in. U.S. Cellular reevaluates its estimate of the guarantee liability at each reporting date. A significant change in any of

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Management's Discussion and Analysis of Financial Condition and Results of Operations

the aforementioned assumptions used to compute the guarantee liability would impact the amount of revenue recognized under these plans and the timing thereof. For the year ended December 31, 2014, U.S. Cellular assumed the earliest contractual time of trade-in, or 12 months, for all customers on installment contracts with trade-in rights.

When a customer exercises the trade-in option, the difference between the outstanding receivable balance forgiven and the fair value of the used device is recorded as a reduction to the guarantee liability. If the customer does not exercise the trade-in option at the time he or she is eligible, U.S. Cellular begins amortizing the liability and records this amortization as additional operating revenue.

Interest

U.S. Cellular equipment installment plans do not provide for explicit interest charges. For equipment installment plans with a duration of greater than twelve months, U.S. Cellular imputes interest using a market rate and recognizes such interest income over the duration of the plan as a component of Interest and dividend income. Changes in the imputed interest rate would impact the amount of revenue recognized under these plans.

Allowance

U.S. Cellular maintains an allowance for doubtful accounts for estimated losses that result from the failure of our customers to make payments due under the equipment installment plans. The allowance is estimated based on historical experience, account aging and other factors that could affect collectability. When it is probable that an account balance will not be collected, the account balance is charged against the allowance for doubtful accounts. To the extent that actual loss experience differs significantly from historical trends, the required allowance amounts could differ from the original estimates.

CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

See Note 18—Related Parties and Note 19—Certain Relationships and Related Transactions in the Notes to Consolidated Financial Statements.

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Management's Discussion and Analysis of Financial Condition and Results of Operations

PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995
SAFE HARBOR CAUTIONARY STATEMENT

This Management's Discussion and Analysis of Financial Condition and Results of Operations and other sections of this Annual Report contain statements that are not based on historical facts, including the words "believes," "anticipates," "intends," "expects" and similar words. These statements constitute and represent "forward-looking statements" as this term is defined in the Private Securities Litigation Reform Act of 1995. Such forward-looking statements involve known and unknown risks, uncertainties and other factors that may cause actual results, events or developments to be significantly different from any future results, events or developments expressed or implied by such forward-looking statements. Such risks, uncertainties and other factors include, but are not limited to, the following risks:

•

Intense competition in the markets in which U.S. Cellular operates could adversely affect U.S. Cellular's revenues or increase its costs to compete.

•

A failure by U.S. Cellular to successfully execute its business strategy (including planned acquisitions, divestitures and exchanges) or allocate resources or capital could have an adverse effect on U.S. Cellular's business, financial condition or results of operations.

•

U.S. Cellular offers customers the option to purchase certain devices under installment contracts, which creates certain risks and uncertainties which could have an adverse impact on U.S. Cellular's financial condition or results of operations.

•

Changes in roaming practices or other factors could cause U.S. Cellular's roaming revenues to decline from current levels and/or impact U.S. Cellular's ability to service its customers in geographic areas where U.S. Cellular does not have its own network, which could have an adverse effect on U.S. Cellular's business, financial condition or results of operations.

•

A failure by U.S. Cellular to obtain access to adequate radio spectrum to meet current or anticipated future needs and/or to accurately predict future needs for radio spectrum could have an adverse effect on U.S. Cellular's business, financial condition or results of operations.

•

To the extent conducted by the Federal Communications Commission ("FCC"), U.S. Cellular is likely to participate in FCC auctions of additional spectrum in the future as an applicant or as a noncontrolling partner in another auction applicant and, during certain periods, will be subject to the FCC's anti-collusion rules, which could have an adverse effect on U.S. Cellular.

•

Changes in the regulatory environment or a failure by U.S. Cellular to timely or fully comply with any applicable regulatory requirements could adversely affect U.S. Cellular's business, financial condition or results of operations.

•

An inability to attract people of outstanding potential, to develop their potential through education and assignments, and to retain them by keeping them engaged, challenged and properly rewarded could have an adverse effect on U.S. Cellular's business, financial condition or results of operations.

•

U.S. Cellular's assets are concentrated in the U.S. wireless telecommunications industry. As a result, its results of operations may fluctuate based on factors related primarily to conditions in this industry.

•

U.S. Cellular's lower scale relative to larger competitors could adversely affect its business, financial condition or results of operations.

•

Changes in various business factors could have an adverse effect on U.S. Cellular's business, financial condition or results of operations.

•

Advances or changes in technology could render certain technologies used by U.S. Cellular obsolete, could put U.S. Cellular at a competitive disadvantage, could reduce U.S. Cellular's revenues or could increase its costs of doing business.

•

Complexities associated with deploying new technologies present substantial risk.

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United States Cellular Corporation
Management's Discussion and Analysis of Financial Condition and Results of Operations

•

U.S. Cellular is subject to numerous surcharges and fees from federal, state and local governments, and the applicability and the amount of these fees are subject to great uncertainty.

•

Performance under device purchase agreements could have a material adverse impact on U.S. Cellular's business, financial condition or results of operations.

•

Changes in U.S. Cellular's enterprise value, changes in the market supply or demand for wireless licenses, adverse developments in the business or the industry in which U.S. Cellular is involved and/or other factors could require U.S. Cellular to recognize impairments in the carrying value of its licenses, goodwill and/or physical assets.

•

Costs, integration problems or other factors associated with acquisitions, divestitures or exchanges of properties or licenses and/or expansion of U.S. Cellular's business could have an adverse effect on U.S. Cellular's business, financial condition or results of operations.

•

U.S. Cellular's investments in unproven technologies may not produce the benefits that U.S. Cellular expects.

•

A failure by U.S. Cellular to complete significant network construction and systems implementation activities as part of its plans to improve the quality, coverage, capabilities and capacity of its network, support and other systems and infrastructure could have an adverse effect on its operations.

•

Difficulties involving third parties with which U.S. Cellular does business, including changes in U.S. Cellular's relationships with or financial or operational difficulties of key suppliers or independent agents and third party national retailers who market U.S. Cellular services, could adversely affect U.S. Cellular's business, financial condition or results of operations.

•

U.S. Cellular has significant investments in entities that it does not control. Losses in the value of such investments could have an adverse effect on U.S. Cellular's financial condition or results of operations.

•

A failure by U.S. Cellular to maintain flexible and capable telecommunication networks or information technology, or a material disruption thereof, could have an adverse effect on U.S. Cellular's business, financial condition or results of operations.

•

Cyber-attacks or other breaches of network or information technology security could have an adverse effect on U.S. Cellular's business, financial condition or results of operations.

•

The market price of U.S. Cellular's Common Shares is subject to fluctuations due to a variety of factors.

•

Changes in facts or circumstances, including new or additional information, could require U.S. Cellular to record charges in excess of amounts accrued in the financial statements, which could have an adverse effect on U.S. Cellular's business, financial condition or results of operations.

•

Disruption in credit or other financial markets, a deterioration of U.S. or global economic conditions or other events could, among other things, impede U.S. Cellular's access to or increase the cost of financing its operating and investment activities and/or result in reduced revenues and lower operating income and cash flows, which would have an adverse effect on U.S. Cellular's business, financial condition or results of operations.

•

Uncertainty of U.S. Cellular's ability to access capital, deterioration in the capital markets, other changes in market conditions, changes in U.S. Cellular's credit ratings or other factors could limit or restrict the availability of financing on terms and prices acceptable to U.S. Cellular, which could require U.S. Cellular to reduce its construction, development or acquisition programs.

•

Settlements, judgments, restraints on its current or future manner of doing business and/or legal costs resulting from pending and future litigation could have an adverse effect on U.S. Cellular's business, financial condition or results of operations.

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United States Cellular Corporation
Management's Discussion and Analysis of Financial Condition and Results of Operations

•

The possible development of adverse precedent in litigation or conclusions in professional studies to the effect that radio frequency emissions from wireless devices and/or cell sites cause harmful health consequences, including cancer or tumors, or may interfere with various electronic medical devices such as pacemakers, could have an adverse effect on U.S. Cellular's business, financial condition or results of operations.

•

Claims of infringement of intellectual property and proprietary rights of others, primarily involving patent infringement claims, could prevent U.S. Cellular from using necessary technology to provide products or services or subject U.S. Cellular to expensive intellectual property litigation or monetary penalties, which could have an adverse effect on U.S. Cellular's business, financial condition or results of operations.

•

There are potential conflicts of interests between TDS and U.S. Cellular.

•

Certain matters, such as control by TDS and provisions in the U.S. Cellular Restated Certificate of Incorporation, may serve to discourage or make more difficult a change in control of U.S. Cellular.

•

Any of the foregoing events or other events could cause revenues, earnings, capital expenditures and/or any other financial or statistical information to vary from U.S. Cellular's forward-looking estimates by a material amount.

See "Risk Factors" in U.S. Cellular's Annual Report on Form 10-K for the year ended December 31, 2014 for a further discussion of these risks. U.S. Cellular undertakes no obligation to update publicly any forward-looking statements whether as a result of new information, future events or otherwise. Readers should evaluate any statements in light of these important factors.

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United States Cellular Corporation
Management's Discussion and Analysis of Financial Condition and Results of Operations

MARKET RISK

Long-Term Debt

As of December 31, 2014, the majority of U.S. Cellular's long-term debt was in the form of fixed-rate notes with maturities ranging up to 49 years. Fluctuations in market interest rates can lead to significant fluctuations in the fair value of these fixed-rate notes.

The following table presents the scheduled principal payments on long-term debt and capital lease obligations, and the related weighted average interest rates by maturity dates at December 31, 2014:

Fair Value of Long-Term Debt

At December 31, 2014 and 2013, the estimated fair value of long-term debt obligations, excluding capital lease obligations and the current portion of such long-term debt, was $1,122.1 million and $817.5 million, respectively. The fair value of long-term debt, excluding capital lease obligations and the current portion of such long-term debt, was estimated using market prices for the 6.95% Senior Notes at December 31, 2014 and 2013 and 7.25% Senior Notes at December 31, 2014 and a discounted cash flow analysis for the 6.7% Senior Notes at December 31, 2014 and 2013.

Other Market Risk Sensitive Instruments

The substantial majority of U.S. Cellular's other market risk sensitive instruments (as defined in item 305 of SEC Regulation S-K) are short-term, including Cash and cash equivalents. Accordingly, U.S. Cellular believes that a significant change in interest rates would not have a material effect on such other market risk sensitive instruments.

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United States Cellular Corporation

Consolidated Statement of Operations

   

The accompanying notes are an integral part of these consolidated financial statements.

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Consolidated Statement of Cash Flows

   

The accompanying notes are an integral part of these consolidated financial statements.

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United States Cellular Corporation

Consolidated Balance Sheet—Assets

   

The accompanying notes are an integral part of these consolidated financial statements.

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United States Cellular Corporation

Consolidated Balance Sheet—Liabilities and Equity

   

The accompanying notes are an integral part of these consolidated financial statements.

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Consolidated Statement of Changes in Equity

The accompanying notes are an integral part of these consolidated financial statements.

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United States Cellular Corporation

Consolidated Statement of Changes in Equity

The accompanying notes are an integral part of these consolidated financial statements.

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United States Cellular Corporation

Consolidated Statement of Changes in Equity

The accompanying notes are an integral part of these consolidated financial statements.

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United States Cellular Corporation

Notes to Consolidated Financial Statements

NOTE 1 SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS

United States Cellular Corporation ("U.S. Cellular"), a Delaware Corporation, is an 84%-owned subsidiary of Telephone and Data Systems, Inc. ("TDS").

Nature of Operations

U.S. Cellular owns, operates and invests in wireless systems throughout the United States. As of December 31, 2014, U.S. Cellular served 4.8 million customers. U.S. Cellular has one reportable segment.

Principles of Consolidation

The accounting policies of U.S. Cellular conform to accounting principles generally accepted in the United States of America ("GAAP") as set forth in the Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC"). Unless otherwise specified, references to accounting provisions and GAAP in these notes refer to the requirements of the FASB ASC. The consolidated financial statements include the accounts of U.S. Cellular, its majority-owned subsidiaries, general partnerships in which U.S. Cellular has a majority partnership interest and variable interest entities ("VIEs") in which U.S. Cellular is the primary beneficiary. Both VIE and primary beneficiary represent terms defined by GAAP.

Intercompany accounts and transactions have been eliminated.

Reclassifications

Certain prior year amounts have been reclassified to conform to the 2014 financial statement presentation. These reclassifications did not affect consolidated net income attributable to U.S. Cellular shareholders, cash flows, assets, liabilities or equity for the years presented.

Use of Estimates

The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect (a) the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and (b) the reported amounts of revenues and expenses during the reported period. Actual results could differ from those estimates. Significant estimates are involved in accounting for goodwill and indefinite-lived intangible assets, income taxes, the loyalty reward program and equipment installment plans.

Cash and Cash Equivalents

Cash and cash equivalents include cash and short-term, highly liquid investments with original maturities of three months or less.

Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivable consist primarily of amounts owed by customers for wireless services and equipment sales, including sales of certain devices under equipment installment plans, by agents for sales of equipment to them and by other wireless carriers whose customers have used U.S. Cellular's wireless systems.

The allowance for doubtful accounts is the best estimate of the amount of probable credit losses related to existing billed and unbilled accounts receivable. The allowance is estimated based on historical experience, account aging and other factors that could affect collectability. Accounts receivable balances are reviewed on either an aggregate or individual basis for collectability depending on the type of

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Notes to Consolidated Financial Statements (Continued)

NOTE 1 SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS (Continued)

receivable. When it is probable that an account balance will not be collected, the account balance is charged against the allowance for doubtful accounts. U.S. Cellular does not have any off-balance sheet credit exposure related to its customers.

The changes in the allowance for doubtful accounts during the years ended December 31, 2014, 2013 and 2012 were as follows:

Inventory

Inventory consists primarily of wireless devices stated at the lower of cost or market, with cost determined using the first-in, first-out method and market determined by replacement costs or estimated net realizable value.

Goodwill

U.S. Cellular has Goodwill as a result of its acquisitions of wireless businesses. Such Goodwill represents the excess of the total purchase price over the fair value of net assets acquired in these transactions.

U.S. Cellular performs its annual impairment assessment of Goodwill as of November 1 of each year. For purposes of conducting its Goodwill impairment test in 2014 and 2013, U.S. Cellular identified four reporting units. The four reporting units represent four geographic groupings of operating markets, representing four geographic service areas. A discounted cash flow approach was used to value each reporting unit for purposes of the Goodwill impairment review.

See Note 7—Intangible Assets for additional details related to Goodwill.

Licenses

Licenses consist of direct and incremental costs incurred in acquiring Federal Communications Commission ("FCC") licenses to provide wireless service.

U.S. Cellular has determined that wireless licenses are indefinite-lived intangible assets and, therefore, not subject to amortization based on the following factors:

•

Radio spectrum is not a depleting asset.

•

The ability to use radio spectrum is not limited to any one technology.

•

U.S. Cellular and its consolidated subsidiaries are licensed to use radio spectrum through the FCC licensing process, which enables licensees to utilize specified portions of the spectrum for the provision of wireless service.

•

U.S. Cellular and its consolidated subsidiaries are required to renew their FCC licenses every ten years or, in some cases, every fifteen years. To date, all of U.S. Cellular's license renewal applications have been granted by the FCC. Generally, license renewal applications filed by licensees otherwise in

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United States Cellular Corporation

Notes to Consolidated Financial Statements (Continued)

NOTE 1 SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS (Continued)

compliance with FCC regulations are routinely granted. If, however, a license renewal application is challenged either by a competing applicant for the license or by a petition to deny the renewal application, the license will be renewed if the licensee can demonstrate its entitlement to a "renewal expectancy." Licensees are entitled to such an expectancy if they can demonstrate to the FCC that they have provided "substantial service" during their license term and have "substantially complied" with FCC rules and policies. U.S. Cellular believes that it is probable that its future license renewal applications will be granted.

U.S. Cellular performs its annual impairment assessment of its licenses as of November 1 of each year. For purposes of its 2014 and 2013 impairment testing of Licenses, U.S. Cellular separated its FCC licenses into eleven units of accounting based on geographic service areas. In both 2014 and 2013, seven of the units of accounting represented geographic groupings of licenses which, because they were not being utilized and, therefore, were not expected to generate cash flows from operating activities in the foreseeable future, were considered separate units of accounting for purposes of impairment testing. U.S. Cellular estimates the fair value of built licenses for purposes of impairment testing using the build-out method. The build-out method estimates the fair value of Licenses by discounting to present value the future cash flows calculated based on a hypothetical cost to build-out U.S. Cellular's network.

For units of accounting which consist of unbuilt licenses, the fair value of the unbuilt licenses is assumed to change by the same percentage, and in the same direction, that the fair value of built licenses measured using the build-out method changed during the period.

See Note 7—Intangible Assets for additional details related to Licenses.

Investments in Unconsolidated Entities

For its equity method investments for which financial information is readily available, U.S. Cellular records its equity in the earnings of the entity in the current period. For its equity method investments for which financial information is not readily available, U.S. Cellular records its equity in the earnings of the entity on a one quarter lag basis.

Property, Plant and Equipment

U.S. Cellular's Property, plant and equipment is stated at the original cost of construction or purchase including capitalized costs of certain taxes, payroll-related expenses, interest and estimated costs to remove the assets.

Expenditures that enhance the productive capacity of assets in service or extend their useful lives are capitalized and depreciated. Expenditures for maintenance and repairs of assets in service are charged to System operations expense or Selling, general and administrative expense, as applicable. Retirements and disposals of assets are recorded by removing the original cost of the asset (along with the related accumulated depreciation) from plant in service and charging it, together with net removal costs (removal costs less an applicable accrued asset retirement obligation and salvage value realized), to (Gain) loss on asset disposals, net.

U.S. Cellular capitalizes certain costs of developing new information systems.

Depreciation and amortization

Depreciation is provided using the straight-line method over the estimated useful life of the related asset.

U.S. Cellular depreciates leasehold improvement assets associated with leased properties over periods ranging from one to thirty years; such periods approximate the shorter of the assets' economic lives or the specific lease terms.

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United States Cellular Corporation

Notes to Consolidated Financial Statements (Continued)

NOTE 1 SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS (Continued)

Useful lives of specific assets are reviewed throughout the year to determine if changes in technology or other business changes would warrant accelerating the depreciation of those specific assets. Due to the Divestiture Transaction more fully described in Note 6—Acquisitions, Divestitures and Exchanges, U.S. Cellular changed the useful lives of certain assets in 2013 and 2012. Other than the Divestiture Transaction, there were no other material changes to useful lives of property, plant and equipment in 2014, 2013 or 2012. See Note 9—Property, Plant and Equipment for additional details related to useful lives.

Impairment of Long-lived Assets

U.S. Cellular reviews long-lived assets for impairment whenever events or changes in circumstances indicate that the assets might be impaired.

U.S. Cellular has one asset group for purposes of assessing property, plant and equipment for impairment based on the fact that the individual operating markets are reliant on centrally operated data centers, mobile telephone switching offices and network operations center. U.S. Cellular operates a single integrated national wireless network, and the lowest level for which identifiable cash flows are largely independent of the cash flows of other groups of assets and liabilities represent cash flows generated by this single interdependent network.

Agent Liabilities

U.S. Cellular has relationships with agents, which are independent businesses that obtain customers for U.S. Cellular. At December 31, 2014 and 2013, U.S. Cellular had accrued $95.3 million and $121.3 million, respectively, for amounts due to agents. This amount is included in Other current liabilities in the Consolidated Balance Sheet.

Other Assets and Deferred Charges

Other assets and deferred charges include underwriters' and legal fees and other charges related to issuing U.S. Cellular's various borrowing instruments and other long-term agreements, and are amortized over the respective term of each instrument. The amounts of deferred charges included in the Consolidated Balance Sheet at December 31, 2014 and 2013, are shown net of accumulated amortization of $34.2 million and $26.0 million, respectively. At December 31, 2014, Other assets and deferred charges includes a $60.0 million deposit made by Advantage Spectrum L.P. to the FCC to participate in Auction 97. See Note 13—Variable Interest Entities for additional information.

Asset Retirement Obligations

U.S. Cellular accounts for asset retirement obligations by recording the fair value of a liability for legal obligations associated with an asset retirement in the period in which the obligations are incurred. At the time the liability is incurred, U.S. Cellular records a liability equal to the net present value of the estimated cost of the asset retirement obligation and increases the carrying amount of the related long-lived asset by an equal amount. Until the obligation is fulfilled, U.S. Cellular updates its estimates relating to cash flows required and timing of settlement. U.S. Cellular records the present value of the changes in the future value as an increase or decrease to the liability and the related carrying amount of the long-lived asset. The liability is accreted to future value over a period ending with the estimated settlement date of the respective asset retirement obligation. The carrying amount of the long-lived asset is depreciated over the useful life of the related asset. Upon settlement of the obligation, any difference between the cost to retire the asset and the recorded liability is recognized in the Consolidated Statement of Operations.

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Notes to Consolidated Financial Statements (Continued)

NOTE 1 SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS (Continued)

Treasury Shares

Common Shares repurchased by U.S. Cellular are recorded at cost as treasury shares and result in a reduction of equity. Treasury shares are reissued as part of U.S. Cellular's stock-based compensation programs. When treasury shares are reissued, U.S. Cellular determines the cost using the first-in, first-out cost method. The difference between the cost of the treasury shares and reissuance price is included in Additional paid-in capital or Retained earnings.

Revenue Recognition

Revenues related to services are recognized as services are rendered. Revenues billed in advance or in arrears of the services being provided are estimated and deferred or accrued, as appropriate.

Revenues from sales of equipment and accessories are recognized when title and risk of loss passes to the agent or end-user customer.

Multiple Deliverable Arrangements

U.S. Cellular sells multiple element service and equipment offerings. In these instances, revenues are allocated using the relative selling price method. Under this method, arrangement consideration, which consists of the amounts billed to the customer net of any cash-based discounts, is allocated to each element on the basis of its relative selling price. Revenue recognized for the delivered items is limited to the amount due from the customer that is not contingent upon the delivery of additional products or services.

Loyalty Reward Program

U.S. Cellular follows the deferred revenue method of accounting for its loyalty reward program. Under this method, revenue allocated to loyalty reward points is deferred. The amount allocated to the loyalty points is based on the estimated retail price of the products and services for which points may be redeemed divided by the number of loyalty points required to receive such products and services. This is calculated on a weighted average basis and requires U.S. Cellular to estimate the percentage of loyalty points that will be redeemed for each product or service.

As of December 31, 2014 and 2013, U.S. Cellular had deferred revenue related to loyalty reward points outstanding of $94.6 million and $116.2 million, respectively. These amounts are recorded in Customer deposits and deferred revenues (a current liability account) in the Consolidated Balance Sheet, as customers may redeem their reward points within the current period.

Revenue is recognized at the time of customer redemption or when such points have been depleted via an account maintenance charge. U.S. Cellular employs the proportional model to recognize revenues associated with breakage. Under the proportional model, U.S. Cellular allocates a portion of the estimated future breakage to each redemption and records revenue proportionally. U.S. Cellular periodically reviews and revises the redemption and depletion rates to estimate future breakage as appropriate based on history and related future expectations.

In the fourth quarter of 2013, U.S. Cellular issued loyalty reward points with a value of $43.5 million as a loyalty bonus in recognition of the inconvenience experienced by customers during U.S. Cellular's billing system conversion in 2013. The value of the loyalty bonus reduced Service revenues in the Consolidated Statement of Operations and increased Customer deposits and deferred revenues in the Consolidated Balance Sheet.

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United States Cellular Corporation

Notes to Consolidated Financial Statements (Continued)

NOTE 1 SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS (Continued)

Equipment Installment Plans

Equipment revenue under equipment installment plan contracts is recognized at the time the device is delivered to the end-user customer for the selling price of the device, net of any deferred imputed interest or trade-in right, if applicable. Imputed interest is reflected as a reduction to the receivable balance and recognized over the duration of the plan as a component of Interest and dividend income. See Note 3—Equipment Installment Plans for additional information.

Incentives

Discounts and incentives are recognized as a reduction of Operating revenues concurrently with the associated revenue, and are allocated to the various products and services in the bundled offering based on their respective relative selling price.

U.S. Cellular issues rebates to its agents and end customers. These incentives are recognized as a reduction to revenue at the time the wireless device sale to the agent or customer occurs, respectively. The total potential rebates and incentives are reduced by U.S. Cellular's estimate of rebates that will not be redeemed by customers based on historical experience of such redemptions.

Activation Fees

U.S. Cellular charges its end customers activation fees in connection with the sale of certain services and equipment. Device activation fees charged at U.S. Cellular agent locations, where U.S. Cellular does not also sell a wireless device to the customer, are deferred and recognized over the average device life. Device activation fees charged as a result of device sales at U.S. Cellular company-owned retail stores are recognized at the time the device is delivered to the customer.

Amounts Collected from Customers and Remitted to Governmental Authorities—Gross vs. Net

U.S. Cellular records amounts collected from customers and remitted to governmental authorities net within a tax liability account if the tax is assessed upon the customer and U.S. Cellular merely acts as an agent in collecting the tax on behalf of the imposing governmental authority. If the tax is assessed upon U.S. Cellular, then amounts collected from customers as recovery of the tax are recorded in Service revenues and amounts remitted to governmental authorities are recorded in Selling, general and administrative expenses in the Consolidated Statement of Operations. The amounts recorded gross in revenues that are billed to customers and remitted to governmental authorities totaled $97.0 million, $114.7 million and $135.7 million for 2014, 2013 and 2012, respectively.

Eligible Telecommunications Carrier ("ETC") Revenues

Telecommunications companies may be designated by states, or in some cases by the FCC, as an ETC to receive support payments from the Universal Service Fund if they provide specified services in "high cost" areas. ETC revenues recognized in the reporting period represent the amounts which U.S. Cellular is entitled to receive for such period, as determined and approved in connection with U.S. Cellular's designation as an ETC in various states.

Advertising Costs

U.S. Cellular expenses advertising costs as incurred. Advertising costs totaled $204.9 million, $199.9 million and $227.0 million in 2014, 2013 and 2012, respectively.

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United States Cellular Corporation

Notes to Consolidated Financial Statements (Continued)

NOTE 1 SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS (Continued)

Income Taxes

U.S. Cellular is included in a consolidated federal income tax return with other members of the TDS consolidated group. TDS and U.S. Cellular are parties to a Tax Allocation Agreement which provides that U.S. Cellular and its subsidiaries be included with the TDS affiliated group in a consolidated federal income tax return and in state income or franchise tax returns in certain situations. For financial statement purposes, U.S. Cellular and its subsidiaries calculate their income, income taxes and credits as if they comprised a separate affiliated group. Under the Tax Allocation Agreement, U.S. Cellular remits its applicable income tax payments to TDS. U.S. Cellular had a tax receivable balance with TDS of $74.3 million and a tax payable balance of $34.8 million as of December 31, 2014 and 2013, respectively.

Deferred taxes are computed using the liability method, whereby deferred tax assets are recognized for future deductible temporary differences and operating loss carryforwards, and deferred tax liabilities are recognized for future taxable temporary differences. Both deferred tax assets and liabilities are measured using the tax rates anticipated to be in effect when the temporary differences reverse. Temporary differences are the differences between the reported amounts of assets and liabilities and their tax bases. Deferred tax assets and liabilities are adjusted for the effects of changes in tax laws and rates on the date of enactment. Deferred tax assets are reduced by a valuation allowance when it is more likely than not that some portion or all of the deferred tax assets will not be realized. U.S. Cellular evaluates income tax uncertainties, assesses the probability of the ultimate settlement with the applicable taxing authority and records an amount based on that assessment.

Stock-Based Compensation

U.S. Cellular has established a long-term incentive plan and a Non-Employee Director compensation plan. These plans are described more fully in Note 16—Stock-based Compensation. These plans are considered compensatory plans and, therefore, recognition of compensation cost for grants made under these plans is required.

U.S. Cellular values its share-based payment transactions using a Black-Scholes valuation model. Stock-based compensation cost recognized during the period is based on the portion of the share-based payment awards that are ultimately expected to vest. Accordingly, stock-based compensation cost recognized has been reduced for estimated forfeitures. Forfeitures are estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. Pre-vesting forfeitures and expected life are estimated based on historical experience related to similar awards, giving consideration to the contractual terms of the stock-based awards, vesting schedules and expectations of future employee behavior. U.S. Cellular believes that its historical experience provides the best estimates of future pre-vesting forfeitures and future expected life. The expected volatility assumption is based on the historical volatility of U.S. Cellular's common stock over a period commensurate with the expected life. The dividend yield assumption is zero because U.S. Cellular has never paid a dividend, except a special cash dividend in June 2013, and has expressed its intention to retain all future earnings in the business. The risk-free interest rate assumption is determined using the U.S. Treasury Yield Curve Rate with a term length that approximates the expected life of the stock options.

The fair value of options is recognized as compensation cost over the respective requisite service period of the awards, which is generally the vesting period, on a straight-line basis for each separate vesting portion of the awards as if the awards were, in-substance, multiple awards (graded vesting attribution method).

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United States Cellular Corporation

Notes to Consolidated Financial Statements (Continued)

NOTE 1 SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS (Continued)

Defined Contribution Plans

U.S. Cellular participates in a qualified noncontributory defined contribution pension plan sponsored by TDS; such plan provides pension benefits for the employees of U.S. Cellular and its subsidiaries. Under this plan, pension benefits and costs are calculated separately for each participant and are funded currently. Pension costs were $10.6 million, $10.4 million and $12.4 million in 2014, 2013 and 2012, respectively.

U.S. Cellular also participates in a defined contribution retirement savings plan ("401(k) plan") sponsored by TDS. Total costs incurred for U.S. Cellular's contributions to the 401(k) plan were $14.9 million, $15.4 million and $17.1 million in 2014, 2013 and 2012, respectively.

Recently Issued Accounting Pronouncements

On April 10, 2014, the FASB issued Accounting Standards Update 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity ("ASU 2014-08"). ASU 2014-08 changes the requirements and disclosures for reporting discontinued operations. U.S. Cellular was required to adopt the provisions of ASU 2014-08 effective January 1, 2015, but early adoption was permitted. U.S. Cellular adopted the provisions of ASU 2014-08 upon its issuance. The adoption of ASU 2014-08 did not have a significant impact on U.S. Cellular's financial position or results of operations.

On May 28, 2014, the FASB issued Accounting Standards Update 2014-09, Revenue from Contracts with Customers ("ASU 2014-09"). ASU 2014-09 outlines a single comprehensive model to use in accounting for revenue arising from contracts with customers. U.S. Cellular is required to adopt the provisions of ASU 2014-09 effective January 1, 2017. Early adoption is prohibited. U.S. Cellular is evaluating what effects the adoption of ASU 2014-09 will have on U.S. Cellular's financial position and results of operations.

On August 27, 2014, the FASB issued Accounting Standards Update 2014-15, Disclosure of Uncertainties about an Entity's Ability to Continue as a Going Concern ("ASU 2014-15"). ASU 2014-15 requires management to perform interim and annual assessments of an entity's ability to continue as a going concern within one year of the date financial statements are issued and provides guidance on determining when and how to disclose going concern uncertainties in financial statements. U.S. Cellular is required to adopt the provisions of ASU 2014-15 effective January 1, 2016, but early adoption is permitted. The adoption of ASU 2014-15 is not expected to impact U.S. Cellular's financial position or results of operations.

On January 9, 2015, the FASB issued Accounting Standards Update 2015-01, Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items ("ASU 2015-01"). ASU 2015-01 eliminates from GAAP the requirement to separately classify, present and disclose extraordinary events and transactions. U.S. Cellular is required to adopt the provisions of ASU 2015-01 effective January 1, 2016, but early adoption is permitted. The adoption of ASU 2015-01 is not expected to impact U.S. Cellular's financial position or results of operations.

On February 18, 2015, the FASB issued Accounting Standards Update 2015-02, Consolidation: Amendments to the Consolidation Analysis ("ASU 2015-02"). ASU 2015-02 simplifies consolidation accounting by reducing the number of consolidation models and changing various aspects of current GAAP, including certain consolidation criteria for variable interest entities. U.S. Cellular is required to adopt the provisions of ASU 2015-02 effective January 1, 2016. Early adoption is permitted. U.S. Cellular is still assessing the impact, if any, the adoption of ASU 2015-02 will have on U.S. Cellular's financial position or results of operations.

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United States Cellular Corporation

Notes to Consolidated Financial Statements (Continued)

NOTE 2 FAIR VALUE MEASUREMENTS

As of December 31, 2014 and 2013, U.S. Cellular did not have any financial or nonfinancial assets or liabilities that were required to be recorded at fair value in its Consolidated Balance Sheet in accordance with GAAP.

The provisions of GAAP establish a fair value hierarchy that contains three levels for inputs used in fair value measurements. Level 1 inputs include quoted market prices for identical assets or liabilities in active markets. Level 2 inputs include quoted market prices for similar assets and liabilities in active markets or quoted market prices for identical assets and liabilities in inactive markets. Level 3 inputs are unobservable. A financial instrument's level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. A financial instrument's level within the fair value hierarchy is not representative of its expected performance or its overall risk profile and, therefore, Level 3 assets are not necessarily higher risk than Level 2 assets or Level 1 assets.

U.S. Cellular has applied the provisions of fair value accounting for purposes of computing the fair value of financial instruments for disclosure purposes as displayed below.

Short-term investments are designated as held-to-maturity investments and recorded at amortized cost in the Consolidated Balance Sheet. For these investments, U.S. Cellular's objective is to earn a higher rate of return on funds that are not anticipated to be required to meet liquidity needs in the near term, while maintaining a low level of investment risk.

The fair values of Cash and cash equivalents and Short-term investments approximate their book values due to the short-term nature of these financial instruments. Long-term debt excludes capital lease obligations and the current portion of Long-term debt. The fair value of "Retail" Long-term debt was estimated using market prices for the 6.95% Senior Notes and 7.25% Senior Notes. U.S. Cellular's "Institutional" debt consists of the 6.7% Senior Notes which are traded over the counter. U.S. Cellular estimated the fair value of its Institutional debt through a discounted cash flow analysis using an estimated yield to maturity of 7.25% and 7.35% at December 31, 2014 and 2013, respectively.

NOTE 3 EQUIPMENT INSTALLMENT PLANS

U.S. Cellular offers customers the option to purchase certain devices under equipment installment contracts over a period of up to 24 months. For certain equipment installment plans, after a specified period of time, the customer may have the right to upgrade to a new device and have the remaining unpaid equipment installment contract balance waived, subject to certain conditions, including trading in the original device in good working condition and signing a new equipment installment contract. U.S. Cellular values this trade-in right as a guarantee liability. The guarantee liability is initially measured at fair value and is determined based on assumptions including the probability and timing of the customer upgrading to a new device and the fair value of the device being traded-in at the time of trade-in. As of December 31, 2014, the guarantee liability related to these plans was $57.5 million and is reflected in Customer deposits and deferred revenues in the Consolidated Balance Sheet.

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United States Cellular Corporation

Notes to Consolidated Financial Statements (Continued)

NOTE 3 EQUIPMENT INSTALLMENT PLANS (Continued)

U.S. Cellular equipment installment plans do not provide for explicit interest charges. For equipment installment plans with duration of greater than twelve months, U.S. Cellular imputes interest.

The following table summarizes the unbilled equipment installment plan receivables as of December 31, 2014 and 2013. Such amounts are presented on the Consolidated Balance Sheet as Accounts receivable—customers and agents and Other assets and deferred charges, where applicable.

U.S. Cellular considers the collectability of the equipment installment plan receivables based on historical payment experience, account aging and other qualitative factors. The credit profiles of U.S. Cellular's customers on equipment installment plans are similar to those of U.S. Cellular customers with traditional subsidized plans. Customers with a higher risk credit profile are required to make a deposit for equipment purchased through an installment contract.

NOTE 4 INCOME TAXES

U.S. Cellular is included in a consolidated federal income tax return and in certain state income tax returns with other members of the TDS consolidated group. For financial statement purposes, U.S. Cellular and its subsidiaries compute their income tax expense as if they comprised a separate affiliated group and were not included in the TDS consolidated group.

U.S. Cellular's current income taxes balances at December 31, 2014 and 2013 were as follows:

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United States Cellular Corporation

Notes to Consolidated Financial Statements (Continued)

NOTE 4 INCOME TAXES (Continued)

Income tax expense (benefit) is summarized as follows:

A reconciliation of U.S. Cellular's income tax expense computed at the statutory rate to the reported income tax expense, and the statutory federal income tax expense rate to U.S. Cellular's effective income tax expense rate is as follows:

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United States Cellular Corporation

Notes to Consolidated Financial Statements (Continued)

NOTE 4 INCOME TAXES (Continued)

Significant components of U.S. Cellular's deferred income tax assets and liabilities at December 31, 2014 and 2013 were as follows:

At December 31, 2014, U.S. Cellular and certain subsidiaries had $1,439.4 million of state NOL carryforwards (generating a $59.4 million deferred tax asset) available to offset future taxable income. The state NOL carryforwards expire between 2015 and 2034. Certain subsidiaries had federal NOL carryforwards (generating a $13.5 million deferred tax asset) available to offset their future taxable income. The federal NOL carryforwards expire between 2018 and 2034. A valuation allowance was established for certain state NOL carryforwards and federal NOL carryforwards since it is more likely than not that a portion of such carryforwards will expire before they can be utilized.

A summary of U.S. Cellular's deferred tax asset valuation allowance is as follows:

As of December 31, 2014, the valuation allowance reduced current deferred tax assets by $3.8 million and noncurrent deferred tax assets by $49.2 million.

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United States Cellular Corporation

Notes to Consolidated Financial Statements (Continued)

NOTE 4 INCOME TAXES (Continued)

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:

Unrecognized tax benefits are included in Accrued taxes and Other deferred liabilities and credits in the Consolidated Balance Sheet. If these benefits were recognized, they would have reduced income tax expense in 2014, 2013 and 2012 by $23.4 million, $18.7 million and $17.2 million, respectively, net of the federal benefit from state income taxes. As of December 31, 2014, it is reasonably possible that unrecognized tax benefits could decrease by approximately $10 million in the next twelve months. The nature of the uncertainty relates primarily to state income tax positions and their resolution or the expiration of statutes of limitation.

U.S. Cellular recognizes accrued interest and penalties related to unrecognized tax benefits in Income tax expense. The amounts charged to income tax expense related to interest and penalties resulted in an expense of $3.5 million and $0.6 million in 2014 and 2013, respectively, and a benefit of $2.2 million in 2012. Net accrued interest and penalties were $16.2 million and $12.3 million at December 31, 2014 and 2013, respectively.

U.S. Cellular is included in TDS' consolidated federal income tax return. U.S. Cellular also files various state and local income tax returns. The TDS consolidated group remains subject to federal income tax audits for the tax years after 2011. With only a few exceptions, TDS is no longer subject to state income tax audits for years prior to 2010.

NOTE 5 EARNINGS PER SHARE

Basic earnings (loss) per share attributable to U.S. Cellular shareholders is computed by dividing Net income (loss) attributable to U.S. Cellular shareholders by the weighted average number of common shares outstanding during the period. Diluted earnings (loss) per share attributable to U.S. Cellular shareholders is computed by dividing Net income (loss) attributable to U.S. Cellular shareholders by the weighted average number of common shares outstanding during the period adjusted to include the effects of potentially dilutive securities. Potentially dilutive securities primarily include incremental shares issuable upon exercise of outstanding stock options and the vesting of restricted stock units.

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United States Cellular Corporation

Notes to Consolidated Financial Statements (Continued)

NOTE 5 EARNINGS PER SHARE (Continued)

The amounts used in computing earnings (loss) per common share and the effects of potentially dilutive securities on the weighted average number of common shares were as follows:

Certain Common Shares issuable upon the exercise of stock options or vesting of restricted stock units were not included in average diluted shares outstanding for the calculation of Diluted earnings (loss) per share attributable to U.S. Cellular shareholders because their effects were antidilutive. The number of such Common Shares excluded, if any, is shown in the table below.

On June 25, 2013, U.S. Cellular paid a special cash dividend of $5.75 per share, for an aggregate amount of $482.3 million, to all holders of U.S. Cellular Common Shares and Series A Common Shares as of June 11, 2013. Outstanding U.S. Cellular stock options and restricted stock unit awards were equitably adjusted for the special cash dividend. The impact of such adjustments on the earnings (loss) per share calculation was fully reflected for all years presented.

NOTE 6 ACQUISITIONS, DIVESTITURES AND EXCHANGES

Divestiture Transaction

On November 6, 2012, U.S. Cellular entered into a Purchase and Sale Agreement with subsidiaries of Sprint Corp., fka Sprint Nextel Corporation ("Sprint"). Pursuant to the Purchase and Sale Agreement, on May 16, 2013, U.S. Cellular transferred customers and certain PCS license spectrum to Sprint in U.S. Cellular's Chicago, central Illinois, St. Louis and certain Indiana/Michigan/Ohio markets ("Divestiture Markets") in consideration for $480 million in cash. The Purchase and Sale Agreement also contemplated certain other agreements, together with the Purchase and Sale Agreement collectively referred to as the "Divestiture Transaction."

These other agreements included customer and network transition services agreements, which required U.S. Cellular to provide customer, billing and network services to Sprint for a period of up to 24 months

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United States Cellular Corporation

Notes to Consolidated Financial Statements (Continued)

NOTE 6 ACQUISITIONS, DIVESTITURES AND EXCHANGES (Continued)

after the May 16, 2013 closing date. Sprint reimbursed U.S. Cellular for providing such services at an amount equal to U.S. Cellular's estimated costs, including applicable overhead allocations. These services were substantially complete as of March 31, 2014. In addition, these agreements require Sprint to reimburse U.S. Cellular up to $200 million (the "Sprint Cost Reimbursement") for certain network decommissioning costs, network site lease rent and termination costs, network access termination costs, and employee termination benefits for specified engineering employees. It is estimated that up to $175 million of the Sprint Cost Reimbursement will be recorded in (Gain) loss on sale of business and other exit costs, net and up to $25 million of the Sprint Cost Reimbursement will be recorded in System operations in the Consolidated Statement of Operations. In 2014 and 2013, $71.1 million and $10.6 million, respectively, of the Sprint Cost Reimbursement had been received and recorded in Cash received from divestitures in the Consolidated Statement of Cash Flows.

Financial impacts of the Divestiture Transaction are classified in the Consolidated Statement of Operations within Operating income. The table below describes the amounts U.S. Cellular has recognized and expects to recognize in the Consolidated Statement of Operations between the date the Purchase and Sale Agreement was signed and the end of the transition services period.

Incremental depreciation, amortization and accretion, net of salvage values represents amounts recorded in the specified time periods as a result of a change in estimate for the remaining useful life and salvage value of certain assets and a change in estimate which accelerated the settlement dates of certain asset retirement obligations in conjunction with the Divestiture Transaction. Specifically, for the periods indicated, this is estimated depreciation, amortization and accretion recorded on assets and liabilities of the Divestiture Markets after the execution of the Purchase and Sale Agreement on November 6, 2012 less depreciation, amortization and accretion that would have been recorded on such assets and liabilities in the normal course, absent the Divestiture Transaction.

In 2014, U.S. Cellular recorded $3.4 million of additional Depreciation, amortization and accretion expense for the Divestiture Markets due to higher asset retirement obligation remediation estimates.

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United States Cellular Corporation

Notes to Consolidated Financial Statements (Continued)

NOTE 6 ACQUISITIONS, DIVESTITURES AND EXCHANGES (Continued)

As a result of the transaction, U.S. Cellular recognized the following amounts in the Consolidated Balance Sheet:

 

Other Acquisitions, Divestitures and Exchanges

•

In December 2014, U.S. Cellular entered into an agreement with a third party to sell 595 towers and certain related contracts, assets, and liabilities for approximately $159 million. This transaction was accomplished in two closings. The first closing occurred in December 2014 and included the sale of 236 towers, without tenants, for $10.0 million. On this same date, U.S. Cellular received $7.5 million in earnest money. At the time of the first closing, a $3.8 million gain was recorded in (Gain) loss on sale of business and other exit costs, net. The second closing for the remaining 359 towers, primarily with tenants, took place in January 2015, at which time U.S. Cellular received $141.5 million in additional cash proceeds and recorded a gain of approximately $107 million. The assets and liabilities subject to the second closing have been classified as "held for sale" in the Consolidated Balance Sheet as of December 31, 2014.

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United States Cellular Corporation

Notes to Consolidated Financial Statements (Continued)

NOTE 6 ACQUISITIONS, DIVESTITURES AND EXCHANGES (Continued)

•

In September 2014, U.S. Cellular entered into an agreement with a third party to exchange certain PCS and AWS licenses for certain other PCS and AWS licenses and $28.0 million of cash. This license exchange will be accomplished in two closing transactions. The first closing occurred in December 2014 at which time U.S. Cellular received licenses with an estimated fair value, per a market approach, of $51.5 million, recorded a $21.7 million gain in (Gain) loss on license sales and exchanges in the Consolidated Statement of Operations and recorded an $18.3 million deferred credit in Other current liabilities. The second closing is expected to occur in 2015. The license that will be transferred has been classified as "Assets held for sale" in the Consolidated Balance Sheet as of December 31, 2014. At the time of the second closing, U.S. Cellular will recognize the deferred credit from the first closing and expects to record a gain on the license exchange.

•

In September 2014, U.S. Cellular entered into an agreement with a third party to exchange certain of its PCS unbuilt licenses for PCS licenses located in U.S. Cellular's operating markets plus $117.0 million of cash. This transaction is subject to regulatory approvals and is expected to close in 2015. The book value of the licenses to be exchanged have been classified as "Assets held for sale" in the Consolidated Balance Sheet at December 31, 2014. U.S. Cellular expects to record a gain when this transaction closes.

•

In May 2014, U.S. Cellular entered into a License Purchase and Customer Recommendation Agreement with Airadigm Communications, Inc. ("Airadigm"). TDS owns 100% of the common stock of Airadigm. Pursuant to the License Purchase and Customer Recommendation Agreement, on September 10, 2014, Airadigm transferred to U.S. Cellular Federal Communications Commission ("FCC") spectrum licenses and certain tower assets in certain markets in Wisconsin, Iowa, Minnesota and Michigan, in consideration for $91.5 million in cash. Since both parties to this transaction are controlled by TDS, upon closing, U.S. Cellular recorded the transferred assets at Airadigm's net book value of $15.2 million. The difference between the consideration paid and the net book value of the transferred assets was recorded as a reduction of U.S. Cellular's Retained earnings. In addition, a deferred tax asset was recorded for the difference between the consideration paid and the net book value of the transferred assets, which increased U.S. Cellular's Additional paid-in capital.

•

In March 2014, U.S. Cellular sold the majority of its St. Louis area non-operating market spectrum license for $92.3 million. A gain of $75.8 million was recorded in (Gain) loss on license sales and exchanges in the Consolidated Statement of Operations in the first quarter of 2014.

•

In February 2014, U.S. Cellular completed an exchange whereby U.S. Cellular received one E block PCS spectrum license covering Milwaukee, WI in exchange for one D block PCS spectrum license covering Milwaukee, WI. The exchange of licenses provided U.S. Cellular with spectrum to meet anticipated future capacity and coverage requirements. No cash, customers, network assets, other assets or liabilities were included in the exchange. As a result of this transaction, U.S. Cellular recognized a gain of $15.7 million, representing the difference between the $15.9 million fair value of the license surrendered, calculated using a market approach valuation method, and the $0.2 million carrying value of the license surrendered. This gain was recorded in (Gain) loss on license sales and exchanges in the Consolidated Statement of Operations in the first quarter of 2014.

•

In October 2013, U.S. Cellular sold the majority of its Mississippi Valley non-operating market license ("unbuilt license") for $308.0 million. At the time of the sale, a $250.6 million gain was recorded in (Gain) loss on license sales and exchanges in the Consolidated Statement of Operations.

•

In November 2012, U.S. Cellular acquired seven 700 MHz licenses covering portions of Illinois, Michigan, Minnesota, Missouri, Nebraska, Oregon, Washington and Wisconsin for $57.7 million.

•

In August 2012, U.S. Cellular acquired four 700 MHz licenses covering portions of Iowa, Kansas, Missouri, Nebraska and Oklahoma for $34.0 million.

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United States Cellular Corporation

Notes to Consolidated Financial Statements (Continued)

NOTE 6 ACQUISITIONS, DIVESTITURES AND EXCHANGES (Continued)

•

In March 2012, U.S. Cellular sold the majority of the assets and liabilities of a wireless market for $49.8 million in cash. At the time of the sale, a $4.2 million gain was recorded in (Gain) loss on sale of business and other exit costs, net in the Consolidated Statement of Operations.

At December 31, 2014 and 2013, the following assets were classified in the Consolidated Balance Sheet as "Assets held for sale" and "Liabilities held for sale":

 

NOTE 7 INTANGIBLE ASSETS

Changes in U.S. Cellular's Licenses and Goodwill are presented below. See Note 6—Acquisitions, Divestitures and Exchanges for information regarding transactions which affected Licenses during the periods.

Licenses

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United States Cellular Corporation

Notes to Consolidated Financial Statements (Continued)

NOTE 7 INTANGIBLE ASSETS (Continued)

Goodwill

NOTE 8 INVESTMENTS IN UNCONSOLIDATED ENTITIES

Investments in unconsolidated entities consist of amounts invested in wireless entities in which U.S. Cellular holds a noncontrolling interest. These investments are accounted for using either the equity or cost method as shown in the following table:

Equity in earnings of unconsolidated entities totaled $129.8 million, $131.9 million and $90.4 million in 2014, 2013 and 2012, respectively; of those amounts, U.S. Cellular's investment in the Los Angeles SMSA Limited Partnership ("LA Partnership") contributed $71.8 million, $78.4 million and $67.2 million in 2014, 2013 and 2012, respectively. U.S. Cellular held a 5.5% ownership interest in the LA Partnership throughout and at the end of each of these years.

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United States Cellular Corporation

Notes to Consolidated Financial Statements (Continued)

NOTE 8 INVESTMENTS IN UNCONSOLIDATED ENTITIES (Continued)

The following tables, which are based on information provided in part by third parties, summarize the combined assets, liabilities and equity, and the combined results of operations of U.S. Cellular's equity method investments:

 

NY1 & NY2 Deconsolidation

U.S. Cellular holds a 60.00% interest in St. Lawrence Seaway RSA Cellular Partnership ("NY1") and a 57.14% interest in New York RSA 2 Cellular Partnership ("NY2") (together with NY1, the "Partnerships"). The remaining interests in the Partnerships are held by Cellco Partnership d/b/a Verizon Wireless ("Verizon Wireless"). Prior to April 3, 2013, because U.S. Cellular owned a greater than 50% interest in each of these Partnerships and based on U.S. Cellular's rights under the Partnership Agreements, U.S. Cellular consolidated the financial results of these Partnerships in accordance with GAAP.

On April 3, 2013, U.S. Cellular entered into an agreement with Verizon Wireless relating to the Partnerships. The agreement amends the Partnership Agreements in several ways which provide Verizon Wireless with substantive participating rights that allow Verizon Wireless to make decisions that are in the ordinary course of business of the Partnerships and which are significant to directing and executing the activities of the business. Accordingly, as required by GAAP, U.S. Cellular deconsolidated the Partnerships effective as of April 3, 2013 and thereafter reported them as equity method investments in its consolidated financial statements ("NY1 & NY2 Deconsolidation"). After the NY1 & NY2 Deconsolidation, U.S. Cellular retained the same ownership percentages in the Partnerships and continues to report the same percentages of income from the Partnerships. Effective April 3, 2013, U.S. Cellular's income from the Partnerships is reported in Equity in earnings of unconsolidated entities in the Consolidated Statement of Operations.

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United States Cellular Corporation

Notes to Consolidated Financial Statements (Continued)

NOTE 8 INVESTMENTS IN UNCONSOLIDATED ENTITIES (Continued)

In accordance with GAAP, as a result of the NY1 & NY2 Deconsolidation, U.S. Cellular's interest in the Partnerships was reflected in Investments in unconsolidated entities at a fair value of $114.8 million as of April 3, 2013. Recording U.S. Cellular's interest in the Partnerships required allocation of the excess of fair value over book value to customer lists, licenses, a favorable contract and goodwill of the Partnerships. Amortization expense related to customer lists and the favorable contract will be recognized over their respective useful lives and is included in Equity in earnings of unconsolidated entities in the Consolidated Statement of Operations. In addition, U.S. Cellular recognized a non-cash pre-tax gain of $18.5 million in the second quarter of 2013. The gain was recorded in Gain (loss) on investments in the Consolidated Statement of Operations.

The Partnerships were valued using a discounted cash flow approach and a guideline public company method. The discounted cash flow approach uses value drivers and risks specific to the industry and current economic factors and incorporates assumptions that market participants would use in their estimates of fair value and may not be indicative of U.S. Cellular specific assumptions. The most significant assumptions made in this process were the revenue growth rate (shown as a simple average in the table below), the terminal revenue growth rate, discount rate and capital expenditures. The assumptions were as follows:

The guideline public company method develops an indication of fair value by calculating average market pricing multiples for selected publicly-traded companies. The developed multiples were applied to applicable financial measures of the Partnerships to determine fair value. The discounted cash flow approach and guideline public company method were weighted to arrive at the total fair value of the Partnerships.

NOTE 9 PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment in service and under construction, and related accumulated depreciation and amortization, as of December 31, 2014 and 2013 were as follows:

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United States Cellular Corporation

Notes to Consolidated Financial Statements (Continued)

NOTE 9 PROPERTY, PLANT AND EQUIPMENT (Continued)

Depreciation and amortization expense totaled $593.2 million, $791.1 million and $597.7 million in 2014, 2013 and 2012, respectively. As a result of the Divestiture Transaction, U.S. Cellular recognized incremental depreciation and amortization in 2014, 2013 and 2012. See Note 6—Acquisitions, Divestitures and Exchanges for additional information.

In 2014, 2013 and 2012, (Gain) loss on asset disposals, net included charges of $21.5 million, $30.6 million and $18.1 million, respectively, related to disposals of assets, trade-ins of older assets for replacement assets and other retirements of assets from service in the normal course of business.

NOTE 10 ASSET RETIREMENT OBLIGATIONS

U.S. Cellular is subject to asset retirement obligations associated with its leased cell sites, switching office sites, retail store sites and office locations in its operating markets. Asset retirement obligations generally include obligations to restore leased land and retail store and office premises to their pre-lease conditions. These obligations are included in Other deferred liabilities and credits and Other current liabilities in the Consolidated Balance Sheet.

In 2014 and 2013, U.S. Cellular performed a review of the assumptions and estimated costs related to its asset retirement obligations. The results of the reviews (identified as "Revisions in estimated cash outflows") and other changes in asset retirement obligations during 2014 and 2013 were as follows:

NOTE 11 DEBT

Revolving Credit Facility

At December 31, 2014, U.S. Cellular had a revolving credit facility available for general corporate purposes. Amounts under the revolving credit facility may be borrowed, repaid and reborrowed from time to time until maturity. U.S. Cellular borrowed and repaid amounts under its revolving credit facility in 2014. U.S. Cellular did not borrow under its revolving credit facility in 2013 or 2012 except for standby letters of credit.

In certain circumstances, U.S. Cellular's interest cost on its revolving credit facility may be subject to increase if its current credit rating from nationally recognized credit rating agencies is lowered, and may be subject to decrease if the rating is raised.

In 2014, certain nationally recognized credit rating agencies downgraded the U.S. Cellular corporate and senior debt credit ratings. After these downgrades, U.S. Cellular is rated at sub-investment grade. As a result of these downgrades, the commitment fee on the revolving credit facility increased to 0.30% per annum. The downgrades also increased the interest rate on any borrowings by 0.25% per annum. The revolving credit facility does not cease to be available nor does the maturity date accelerate solely as a

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United States Cellular Corporation

Notes to Consolidated Financial Statements (Continued)

NOTE 11 DEBT (Continued)

result of a downgrade in U.S. Cellular's credit rating. However, downgrades in U.S. Cellular's credit rating could adversely affect its ability to renew the revolving credit facility or obtain access to other credit facilities in the future.

The maturity date of any borrowings under the U.S. Cellular revolving credit facility would accelerate in the event of a change in control.

The following table summarizes the terms of the revolving credit facility as of December 31, 2014:

The continued availability of the revolving credit facility requires U.S. Cellular to comply with certain negative and affirmative covenants, maintain certain financial ratios and make representations regarding certain matters at the time of each borrowing. U.S. Cellular believes it was in compliance as of December 31, 2014 with all covenants and other requirements set forth in the revolving credit facility.

In connection with U.S. Cellular's revolving credit facility, TDS and U.S. Cellular entered into a subordination agreement dated December 17, 2010 together with the administrative agent for the lenders under U.S. Cellular's revolving credit agreement. Pursuant to this subordination agreement, (a) any

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consolidated funded indebtedness from U.S. Cellular to TDS will be unsecured and (b) any (i) consolidated funded indebtedness from U.S. Cellular to TDS (other than "refinancing indebtedness" as defined in the subordination agreement) in excess of $105,000,000, and (ii) refinancing indebtedness in excess of $250,000,000, will be subordinated and made junior in right of payment to the prior payment in full of obligations to the lenders under U.S. Cellular's revolving credit agreement. As of December 31, 2014, U.S. Cellular had no outstanding consolidated funded indebtedness or refinancing indebtedness that was subordinated to the revolving credit agreement pursuant to the subordination agreement.

In July 2014, U.S. Cellular entered into an amendment to the revolving credit facility agreement which increased the Consolidated Leverage Ratio (the ratio of Consolidated Funded Indebtedness to Consolidated Earnings before interest, taxes, depreciation and amortization) that U.S. Cellular is required to maintain. Beginning July 1, 2014, U.S. Cellular is required to maintain the Consolidated Leverage Ratio at a level not to exceed 3.75 to 1.00 for the period of the four fiscal quarters most recently ended (this was 3.00 to 1.00 prior to July 1, 2014). The terms of the amendment decrease the maximum permitted Consolidated Leverage Ratio beginning January 1, 2016, with further decreases effective July 1, 2016 and January 1, 2017 (and will return to 3.00 to 1.00 at that time). For the twelve months ended December 31, 2014, the actual Consolidated Leverage Ratio was 2.35 to 1.00. Future changes in U.S. Cellular's financial condition could negatively impact its ability to meet the financial covenants and requirements in its revolving credit facility agreement.

Long-Term Financing

Long-term debt as of December 31, 2014 and 2013 was as follows:

U.S. Cellular may redeem the 6.7% Senior Notes, in whole or in part, at any time prior to maturity at a redemption price equal to the greater of (a) 100% of the principal amount of such notes, plus accrued and unpaid interest, or (b) the sum of the present values of the remaining scheduled payments of principal and interest thereon discounted to the redemption date on a semi-annual basis at the Treasury Rate plus 30 basis points. U.S. Cellular may redeem the 6.95% Senior Notes and 7.25% Senior Notes, in whole or in part at any time after the call date, at a redemption price equal to 100% of the principal amount redeemed plus accrued and unpaid interest.

Interest on the 6.7% Senior Notes is payable semi-annually, and is payable quarterly on the 6.95% and 7.25% Senior Notes.

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Capitalized debt issuance costs for Unsecured Senior Notes totaled $25.9 million and are included in Other assets and deferred charges (a long-term asset account). These costs are amortized over the life of the notes using the effective interest method.

U.S. Cellular does not have any annual requirements for principal payments on long-term debt over the next five years (excluding capital lease obligations).

The covenants associated with U.S. Cellular's long-term debt obligations, among other things, restrict U.S. Cellular's ability, subject to certain exclusions, to incur additional liens, enter into sale and leaseback transactions, and sell, consolidate or merge assets.

U.S. Cellular's long-term debt indentures do not contain any provisions resulting in acceleration of the maturities of outstanding debt in the event of a change in U.S. Cellular's credit rating. However, a downgrade in U.S. Cellular's credit rating could adversely affect its ability to obtain long-term debt financing in the future.

Term Loan Facility

On January 21, 2015, U.S. Cellular entered into a term loan credit facility relating to $225.0 million in debt. The term loan must be drawn in one or more advances by the six month anniversary of the date of the agreement; amounts not drawn by that time will cease to be available. Amounts repaid or prepaid under the term loan facility may not be reborrowed. The term loan is available for general corporate purposes, including working capital, spectrum purchases and capital expenditures. The term loan is unsecured except for a lien on all investments in equity which U.S. Cellular may have in the loan administrative agent, CoBank ACB, subject to certain limitations.

In certain circumstances, U.S. Cellular's interest cost on its term loan may be subject to increase if its current credit ratings from nationally recognized credit rating agencies are lowered, and may be subject to decrease if the ratings are raised. The term loan facility does not cease to be available nor does the maturity date accelerate solely as a result of a downgrade in U.S. Cellular's credit rating. However, downgrades in U.S. Cellular's credit rating could adversely affect its ability to renew or obtain access to credit facilities in the future.

The maturity date of term loan would accelerate in the event of a change in control.

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NOTE 11 DEBT (Continued)

The following table summarizes the terms of the term loan facility as of February 25, 2015:

The continued availability of the term loan facility requires U.S. Cellular to comply with certain negative and affirmative covenants, maintain certain financial ratios and make representations regarding certain matters at the time of each borrowing, that are substantially the same as those in the U.S. Cellular revolving credit facility described above.

In connection with U.S. Cellular's term credit facility, TDS and U.S. Cellular entered into a subordination agreement dated January 21, 2015 together with the administrative agent for the lenders under U.S. Cellular's term loan credit agreement, which is substantially the same as the subordination agreement in the U.S. Cellular revolving credit facility described above. As of February 25, 2015, U.S. Cellular had no outstanding consolidated funded indebtedness or refinancing indebtedness that was subordinated to the term loan facility pursuant to this subordination agreement.

NOTE 12 COMMITMENTS AND CONTINGENCIES

Agreements

•

On November 25, 2014, U.S. Cellular executed a Master Statement of Work and certain other documents with Amdocs Software Systems Limited ("Amdocs"), effective October 1, 2014, that inter-relate with but rearrange the structure under previous Amdocs Agreements. The agreement provides that U.S. Cellular will now outsource to Amdocs certain support functions for its Billing and Operational Support System ("B/OSS"). Such functions include application support, billing operations and some infrastructure services. The agreement has a term through September 30, 2019, subject to five one-year renewal periods at U.S. Cellular's option. The total estimated amount to be paid to Amdocs

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NOTE 12 COMMITMENTS AND CONTINGENCIES (Continued)

with respect to the agreement during the initial five-year term is approximately $110 million (exclusive of travel and expenses and subject to certain potential adjustments).

•

During 2013, U.S. Cellular entered into agreements with Apple to purchase certain minimum quantities of Apple iPhone products and fund marketing programs related to the Apple iPhone and iPad products over a three-year period beginning in November 2013. Based on current forecasts, U.S. Cellular estimates that the remaining contractual commitment as of December 31, 2014 under these agreements is approximately $818 million. At this time, U.S. Cellular expects to meet its contractual commitments with Apple.

Lease Commitments

U.S. Cellular is a party to various lease agreements, both as lessee and lessor, for office space, retail store sites, cell sites and equipment which are accounted for as operating leases. Certain leases have renewal options and/or fixed rental increases. Renewal options that are reasonably assured of exercise are included in determining the lease term. Any rent abatements or lease incentives, in addition to fixed rental increases, are included in the calculation of rent expense and calculated on a straight-line basis over the defined lease term.

As of December 31, 2014, future minimum rental payments required under operating leases and rental receipts expected under operating leases that have noncancellable lease terms in excess of one year were as follows:

Rent expense totaled $152.4 million, $162.1 million and $183.9 million in 2014, 2013 and 2012, respectively.

Indemnifications

U.S. Cellular enters into agreements in the normal course of business that provide for indemnification of counterparties. The terms of the indemnifications vary by agreement. The events or circumstances that would require U.S. Cellular to perform under these indemnities are transaction specific; however, these agreements may require U.S. Cellular to indemnify the counterparty for costs and losses incurred from litigation or claims arising from the underlying transaction. U.S. Cellular is unable to estimate the maximum potential liability for these types of indemnifications as the amounts are dependent on the outcome of future events, the nature and likelihood of which cannot be determined at this time. Historically, U.S. Cellular has not made any significant indemnification payments under such agreements.

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NOTE 12 COMMITMENTS AND CONTINGENCIES (Continued)

Legal Proceedings

U.S. Cellular is involved or may be involved from time to time in legal proceedings before the FCC, other regulatory authorities, and/or various state and federal courts. If U.S. Cellular believes that a loss arising from such legal proceedings is probable and can be reasonably estimated, an amount is accrued in the financial statements for the estimated loss. If only a range of loss can be determined, the best estimate within that range is accrued; if none of the estimates within that range is better than another, the low end of the range is accrued. The assessment of the expected outcomes of legal proceedings is a highly subjective process that requires judgments about future events. The legal proceedings are reviewed at least quarterly to determine the adequacy of accruals and related financial statement disclosures. The ultimate outcomes of legal proceedings could differ materially from amounts accrued in the financial statements.

U.S. Cellular has accrued $0.4 million and $0.3 million with respect to legal proceedings and unasserted claims as of December 31, 2014 and 2013, respectively. U.S. Cellular has not accrued any amount for legal proceedings if it cannot estimate the amount of the possible loss or range of loss. U.S. Cellular does not believe that the amount of any contingent loss in excess of the amounts accrued would be material.

NOTE 13 VARIABLE INTEREST ENTITIES (VIEs)

U.S. Cellular consolidates variable interest entities in which it has a controlling financial interest and is the primary beneficiary. A controlling financial interest will have both of the following characteristics: (a) the power to direct the VIE activities that most significantly impact economic performance and (b) the obligation to absorb the VIE losses and right to receive benefits that are significant to the VIE. U.S. Cellular reviews these criteria initially at the time it enters into agreements and subsequently when reconsideration events occur.

Consolidated VIEs

As of December 31, 2014, U.S. Cellular holds a variable interest in and consolidates the following VIEs under GAAP:

•

Advantage Spectrum L.P. ("Advantage Spectrum") and Frequency Advantage L.P., the general partner of Advantage Spectrum;

•

Aquinas Wireless L.P. ("Aquinas Wireless"); and

•

King Street Wireless L.P. ("King Street Wireless") and King Street Wireless, Inc., the general partner of King Street Wireless.

The power to direct the activities that most significantly impact the economic performance of Advantage Spectrum, Aquinas Wireless and King Street Wireless (collectively, the "limited partnerships") is shared. Specifically, the general partner of these VIEs has the exclusive right to manage, operate and control the limited partnerships and make all decisions to carry on the business of the partnerships; however, the general partner of each partnership needs consent of the limited partner, a U.S. Cellular subsidiary, to sell or lease certain licenses, to make certain large expenditures, admit other partners or liquidate the limited partnerships. Although the power to direct the activities of the VIEs is shared, U.S. Cellular has a disproportionate level of exposure to the variability associated with the economic performance of the VIEs, indicating that U.S. Cellular is the primary beneficiary of the VIEs in accordance with GAAP. Accordingly, these VIEs are consolidated.

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NOTE 13 VARIABLE INTEREST ENTITIES (VIEs) (Continued)

The following table presents the classification of the consolidated VIEs' assets and liabilities in U.S. Cellular's Consolidated Balance Sheet.

Other Related Matters

An FCC auction of AWS-3 spectrum licenses, referred to as Auction 97, began in November 2014 and ended in January 2015. U.S. Cellular participated in Auction 97 indirectly through its interest in Advantage Spectrum. A subsidiary of U.S. Cellular is a limited partner in Advantage Spectrum. Advantage Spectrum qualified as a "designated entity," and thereby was eligible for bid credits with respect to spectrum purchased in Auction 97. To participate in this auction, a $60.0 million deposit was made to the FCC in 2014. Such amount is reflected in Other Assets and Deferred Charges in the Consolidated Balance Sheet. Advantage Spectrum was the provisional winning bidder for 124 licenses for an aggregate bid of $338.3 million, net of its anticipated designated entity discount of 25%. Advantage Spectrum's bid amount, less the initial deposit of $60.0 million, plus certain other charges totaling $2.3 million, are required to be paid to the FCC by March 2, 2015.

Advantage Spectrum, Aquinas Wireless and King Street Wireless were formed to participate in FCC auctions of wireless spectrum and to fund, establish, and provide wireless service with respect to any FCC licenses won in the auctions. As such, these entities have risks similar to those described in the "Risk Factors" in U.S. Cellular's Annual Report on Form 10-K.

U.S. Cellular's capital contributions and advances made to its VIEs totaled $60.9 million in the year ended December 31, 2014. In 2013, there were no capital contributions or advances made to VIEs or their general partners that were not VIEs.

U.S. Cellular may agree to make additional capital contributions and/or advances to Advantage Spectrum, Aquinas Wireless or King Street Wireless and/or to their general partners to provide additional funding for the development of licenses granted in various auctions. U.S. Cellular may finance such amounts with a combination of cash on hand, borrowings under its revolving credit agreement and/or long-term debt. There is no assurance that U.S. Cellular will be able to obtain additional financing on commercially reasonable terms or at all to provide such financial support.

The limited partnership agreements of Advantage Spectrum, Aquinas Wireless and King Street Wireless also provide the general partner with a put option whereby the general partner may require the limited partner, a subsidiary of U.S. Cellular, to purchase its interest in the limited partnership. The general partner's put options related to its interests in King Street Wireless and Aquinas Wireless will become

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NOTE 13 VARIABLE INTEREST ENTITIES (VIEs) (Continued)

exercisable in 2019 and 2020, respectively. The general partner's put options related to its interest in Advantage Spectrum will become exercisable on the fifth and sixth anniversaries of the issuance of any license. The put option price is determined pursuant to a formula that takes into consideration fixed interest rates and the market value of U.S. Cellular's Common Shares. Upon exercise of the put option, the general partner is required to repay borrowings due to U.S. Cellular. If the general partner does not elect to exercise its put option, the general partner may trigger an appraisal process in which the limited partner (a subsidiary of U.S. Cellular) may have the right, but not the obligation, to purchase the general partner's interest in the limited partnership at a price and on other terms and conditions specified in the limited partnership agreement. In accordance with requirements under GAAP, U.S. Cellular is required to calculate a theoretical redemption value for all of the put options assuming they are exercisable at the end of each reporting period, even though such exercise is not contractually permitted. Pursuant to GAAP, this theoretical redemption value, net of amounts payable to U.S. Cellular for loans and accrued interest thereon made by U.S. Cellular to the general partners the ("net put value"), was $1.2 million and $0.5 million at December 31, 2014 and 2013, respectively. The net put value is recorded as Noncontrolling interests with redemption features in U.S. Cellular's Consolidated Balance Sheet. Also in accordance with GAAP, changes in the redemption value of the put options, net of interest accrued on the loans, are recorded as a component of Net income attributable to noncontrolling interests, net of tax, in U.S. Cellular's Consolidated Statement of Operations.

NOTE 14 NONCONTROLLING INTERESTS

U.S. Cellular's consolidated financial statements include certain noncontrolling interests that meet the GAAP definition of mandatorily redeemable financial instruments. These mandatorily redeemable noncontrolling interests represent interests held by third parties in consolidated partnerships, where the terms of the underlying partnership agreement provide for a defined termination date at which time the assets of the subsidiary are to be sold, the liabilities are to be extinguished and the remaining net proceeds are to be distributed to the noncontrolling interest holders and U.S. Cellular in accordance with the respective partnership. The termination dates of these mandatorily redeemable noncontrolling interests range from 2085 to 2113.

The estimated aggregate amount that would be due and payable to settle all of these noncontrolling interests assuming an orderly liquidation of the finite-lived consolidated partnerships on December 31, 2014, net of estimated liquidation costs, is $9.9 million. This amount excludes redemption amounts recorded in Noncontrolling interests with redemption features in the Consolidated Balance Sheet. The estimate of settlement value was based on certain factors and assumptions which are subjective in nature. Changes in those factors and assumptions could result in a materially larger or smaller settlement amount. U.S. Cellular currently has no plans or intentions relating to the liquidation of any of the related partnerships prior to their scheduled termination dates. The corresponding carrying value of the mandatorily redeemable noncontrolling interests in finite-lived consolidated partnerships at December 31, 2014 was $7.8 million, and is included in Noncontrolling interests in the Consolidated Balance Sheet. The excess of the aggregate settlement value over the aggregate carrying value of these mandatorily redeemable noncontrolling interests is due primarily to the unrecognized appreciation of the noncontrolling interest holders' share of the underlying net assets in the consolidated partnerships. Neither the noncontrolling interest holders' share, nor U.S. Cellular's share, of the appreciation of the underlying net assets of these subsidiaries is reflected in the consolidated financial statements.

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NOTE 15 COMMON SHAREHOLDERS' EQUITY

Tax-Deferred Savings Plan

U.S. Cellular has reserved 67,215 Common Shares for issuance under the TDS Tax-Deferred Savings Plan, a qualified profit-sharing plan pursuant to Sections 401(a) and 401(k) of the Internal Revenue Code. Participating employees have the option of investing their contributions in a U.S. Cellular Common Share fund, a TDS Common Share fund or certain unaffiliated funds.

Series A Common Shares

Series A Common Shares are convertible on a share-for-share basis into Common Shares. In matters other than the election of directors, each Series A Common Share is entitled to ten votes per share, compared to one vote for each Common Share. The Series A Common Shares are entitled to elect 75% of the directors (rounded down), and the Common Shares elect 25% of the directors (rounded up). As of December 31, 2014, a majority of U.S. Cellular's outstanding Common Shares and all of U.S. Cellular's outstanding Series A Common Shares were held by TDS.

Common Share Repurchase Program

On November 17, 2009, the Board of Directors of U.S. Cellular authorized the repurchase of up to 1,300,000 Common Shares on an annual basis beginning in 2009 and continuing each year thereafter, on a cumulative basis. These purchases will be made pursuant to open market purchases, block purchases, private purchases, or otherwise, depending on market prices and other conditions. This authorization does not have an expiration date.

Share repurchases made under this authorization were as follows:

Pursuant to certain employee and non-employee benefit plans, U.S. Cellular reissued the following Treasury Shares:

NOTE 16 STOCK-BASED COMPENSATION

U.S. Cellular has established the following stock-based compensation plans: Long-Term Incentive Plans and a Non-Employee Director compensation plan.

Under the U.S. Cellular Long-Term Incentive Plans, U.S. Cellular may grant fixed and performance based incentive and non-qualified stock options, restricted stock, restricted stock units, and deferred compensation stock unit awards to key employees. At December 31, 2014, the only types of awards outstanding are fixed non-qualified stock option awards, restricted stock unit awards, and deferred compensation stock unit awards.

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NOTE 16 STOCK-BASED COMPENSATION (Continued)

On June 25, 2013, U.S. Cellular paid a special cash dividend to all holders of U.S. Cellular Common Shares and Series A Common Shares as of June 11, 2013. Outstanding U.S. Cellular stock options, restricted stock unit awards and deferred compensation stock units were equitably adjusted for the special cash dividend. The impact of such adjustments are fully reflected for all years presented. See Note 5—Earnings Per Share for additional information.

At December 31, 2014, U.S. Cellular had reserved 9,782,000 Common Shares for equity awards granted and to be granted under the Long-Term Incentive Plans.

U.S. Cellular also has established a Non-Employee Director compensation plan under which it has reserved 197,000 Common Shares at December 31, 2014 for issuance as compensation to members of the Board of Directors who are not employees of U.S. Cellular or TDS.

U.S. Cellular uses treasury stock to satisfy requirements for Common Shares issued pursuant to its various stock-based compensation plans.

Long-Term Incentive Plans—Stock Options—Stock options granted to key employees are exercisable over a specified period not in excess of ten years. Stock options generally vest over a period of three years from the date of grant. Stock options outstanding at December 31, 2014 expire between 2015 and 2024. However, vested stock options typically expire 30 days after the effective date of an employee's termination of employment for reasons other than retirement. Employees who leave at the age of retirement have 90 days (or one year if they satisfy certain requirements) within which to exercise their vested stock options. The exercise price of options equals the market value of U.S. Cellular Common Shares on the date of grant.

U.S. Cellular estimated the fair value of stock options granted during 2014, 2013, and 2012 using the Black-Scholes valuation model and the assumptions shown in the table below.

The fair value of options is recognized as compensation cost using an accelerated attribution method over the requisite service periods of the awards, which is generally the vesting period.

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NOTE 16 STOCK-BASED COMPENSATION (Continued)

A summary of U.S. Cellular stock options outstanding (total and portion exercisable) and changes during the three years ended December 31, 2014, is presented in the table below:

The aggregate intrinsic value in the table above represents the total pre-tax intrinsic value (the difference between U.S. Cellular's closing stock price and the exercise price multiplied by the number of in-the-money options) that was received by the option holders upon exercise or that would have been received by option holders had all options been exercised on December 31, 2014.

Long-Term Incentive Plans—Restricted Stock Units—U.S. Cellular grants restricted stock unit awards, which generally vest after three years, to key employees.

U.S. Cellular estimates the fair value of restricted stock units based on the closing market price of U.S. Cellular shares on the date of grant. The fair value is then recognized as compensation cost on a straight-line basis over the requisite service periods of the awards, which is generally the vesting period.

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NOTE 16 STOCK-BASED COMPENSATION (Continued)

A summary of U.S. Cellular nonvested restricted stock units at December 31, 2014 and changes during the year then ended is presented in the table below:

The total fair value of restricted stock units that vested during 2014, 2013 and 2012 was $11.1 million, $8.8 million and $8.9 million, respectively, as of the respective vesting dates. The weighted average grant date fair value of restricted stock units granted in 2014, 2013 and 2012 was $41.24, $32.06 and $34.09, respectively.

Long-Term Incentive Plans—Deferred Compensation Stock Units—Certain U.S. Cellular employees may elect to defer receipt of all or a portion of their annual bonuses and to receive a company matching contribution on the amount deferred. All bonus compensation that is deferred by employees electing to participate is immediately vested and is deemed to be invested in U.S. Cellular Common Share stock units. The amount of U.S. Cellular's matching contribution depends on the portion of the annual bonus that is deferred. Participants receive a 25% match for amounts deferred up to 50% of their total annual bonus and a 33% match for amounts that exceed 50% of their total annual bonus; such matching contributions also are deemed to be invested in U.S. Cellular Common Share stock units.

There were no deferred compensation stock units granted or that vested during 2014. The total fair value of deferred compensation stock units that vested during 2013 and 2012 was less than $0.1 million in each year. The weighted average grant date fair value of deferred compensation stock units granted in 2013 and 2012 was $31.50 and $36.34, respectively. As of December 31, 2014, there were no vested or unissued deferred compensation stock units outstanding.

Compensation of Non-Employee Directors—U.S. Cellular issued 14,200, 13,000 and 7,600 Common Shares in 2014, 2013 and 2012, respectively, under its Non-Employee Director compensation plan.

Stock-Based Compensation Expense

The following table summarizes stock-based compensation expense recognized during 2014, 2013 and 2012:

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NOTE 16 STOCK-BASED COMPENSATION (Continued)

The following table provides a summary of the stock-based compensation expense included in the Consolidated Statement of Operations for the years ended:

At December 31, 2014, unrecognized compensation cost for all U.S. Cellular stock-based compensation awards was $24.1 million and is expected to be recognized over a weighted average period of 2.0 years.

U.S. Cellular's tax benefits realized from the exercise of stock options and other awards totaled $5.3 million in 2014.

NOTE 17 SUPPLEMENTAL CASH FLOW DISCLOSURES

Following are supplemental cash flow disclosures regarding interest paid and income taxes paid.

Following are supplemental cash flow disclosures regarding transactions related to stock-based compensation awards. In certain situations, U.S. Cellular withholds shares that are issuable upon the exercise of stock options or the vesting of restricted shares to cover, and with a value equivalent to, the exercise price and/or the amount of taxes required to be withheld from the stock award holder at the time of the exercise or vesting. U.S. Cellular then pays the amount of the required tax withholdings to the taxing authorities in cash.

On September 27, 2012, the FCC conducted a single round, sealed bid, reverse auction to award up to $300 million in one-time Mobility Fund Phase I support to successful bidders that commit to provide 3G, or better, wireless service in areas designated as unserved by the FCC. This auction was designated by the FCC as Auction 901. U.S. Cellular and several of its wholly-owned subsidiaries participated in Auction 901 and were winning bidders in eligible areas within 10 states and will receive up to $40.1 million in one-time support from the Mobility Fund. These funds when received reduce the carrying amount of the assets to which they relate or offset operating expenses. In connection with these winning bids, in June 2013, U.S. Cellular provided $17.4 million letters of credit to the FCC, of which the entire amount remained outstanding as of December 31, 2014. U.S. Cellular has received $13.4 million in support funds as of December 31, 2014, of which $1.9 million is included as a component of Other assets and deferred

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NOTE 17 SUPPLEMENTAL CASH FLOW DISCLOSURES (Continued)

charges in the Consolidated Balance Sheet and $11.5 million reduced the carrying amount of the assets to which they relate, which are included in Property, plant and equipment in the Consolidated Balance Sheet.

NOTE 18 RELATED PARTIES

U.S. Cellular is billed for all services it receives from TDS, pursuant to the terms of various agreements between it and TDS. These billings are included in U.S. Cellular's Selling, general and administrative expenses. Some of these agreements were established at a time prior to U.S. Cellular's initial public offering when TDS owned more than 90% of U.S. Cellular's outstanding capital stock and may not reflect terms that would be obtainable from an unrelated third party through arms-length negotiations. Billings from TDS to U.S. Cellular are based on expenses specifically identified to U.S. Cellular and on allocations of common expenses. Such allocations are based on the relationship of U.S. Cellular's assets, employees, investment in property, plant and equipment and expenses relative to all subsidiaries in the TDS consolidated group. Management believes the method TDS uses to allocate common expenses is reasonable and that all expenses and costs applicable to U.S. Cellular are reflected in its financial statements. Billings to U.S. Cellular from TDS totaled $91.1 million, $99.2 million and $104.3 million in 2014, 2013 and 2012, respectively.

The Audit committee of the Board of Directors of U.S. Cellular is responsible for the review and evaluation of all related party transactions as such term is defined by the rules of the New York Stock Exchange ("NYSE").

NOTE 19 CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

The following persons are partners of Sidley Austin LLP, the principal law firm of U.S. Cellular and its subsidiaries: Walter C.D. Carlson, a director of U.S. Cellular, a director and non-executive Chairman of the Board of Directors of TDS and a trustee and beneficiary of a voting trust that controls TDS; William S. DeCarlo, the General Counsel of TDS and an Assistant Secretary of TDS and certain subsidiaries of TDS; and Stephen P. Fitzell, the General Counsel of U.S. Cellular and TDS Telecommunications Corporation and an Assistant Secretary of U.S. Cellular and certain other subsidiaries of TDS. Walter C.D. Carlson does not provide legal services to TDS, U.S. Cellular or their subsidiaries. U.S. Cellular and its subsidiaries incurred legal costs from Sidley Austin LLP of $10.7 million in 2014, $13.2 million in 2013 and $10.7 million in 2012.

In December 2014, U.S. Cellular entered into an agreement to sell 595 towers outside of its core markets to a third party for $159 million. The sale of certain of the towers was completed in December 2014, and the sale of the remaining towers was completed in January 2015. See Note 6—Acquisitions, Divestitures and Exchanges in the Notes to the Consolidated Financial Statements. Of the 595 towers, six towers were acquired by U.S. Cellular from Airadigm for a total of $2.6 million. These six towers were included as part of the sale of towers by U.S. Cellular in order to avoid the need for two sets of transaction documents. The value of $2.6 million paid by U.S. Cellular to Airadigm for such six towers was determined using the same method of valuation that was used to value the towers owned by U.S. Cellular that were sold to the third party. The Audit Committee of the board of directors reviewed and evaluated this transaction between U.S. Cellular and Airadigm.

In December 2013, TDS initially proposed to have Airadigm Communications, Inc. ("Airadigm") sell to U.S. Cellular the FCC spectrum licenses, towers and customers in certain Airadigm markets for $110 million in cash. Because TDS owns 100% of the common stock of Airadigm and approximately 84% of the common stock of U.S. Cellular, this proposal was a related party transaction. Accordingly, the U.S. Cellular Board of Directors formed a Special Committee comprised entirely of independent and disinterested directors with exclusive authority to consider, negotiate and, if appropriate, approve any

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NOTE 19 CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS (Continued)

such transaction with Airadigm without any further involvement of the full board. The U.S. Cellular Special Committee engaged independent financial advisors and legal counsel. The transaction was negotiated between representatives of TDS and Airadigm, on the one hand, and the Special Committee and its representatives, on the other hand. The U.S. Cellular Special Committee also received a fairness opinion from its independent financial advisor. Following these events, the Special Committee approved a License Purchase and Customer Recommendation Agreement between U.S. Cellular and Airadigm. Pursuant to the License Purchase and Customer Recommendation Agreement, on September 10, 2014, Airadigm transferred to U.S. Cellular Federal Communications Commission ("FCC") spectrum licenses and certain tower assets in certain markets in Wisconsin, Iowa, Minnesota and Michigan, in consideration for $91.5 million in cash. See Note 6—Acquisitions, Divestitures and Exchanges in the Notes to Consolidated Financial Statements.

The Audit Committee of the Board of Directors of U.S. Cellular is responsible for the review and evaluation of all related-party transactions as such term is defined by the rules of the New York Stock Exchange.

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REPORTS OF MANAGEMENT

Management's Responsibility for Financial Statements

Management of United States Cellular Corporation has the responsibility for preparing the accompanying consolidated financial statements and for their integrity and objectivity. The statements were prepared in accordance with accounting principles generally accepted in the United States of America and, in management's opinion, were fairly presented. The financial statements included amounts that were based on management's best estimates and judgments. Management also prepared the other information in the annual report and is responsible for its accuracy and consistency with the financial statements.

PricewaterhouseCoopers LLP, an independent registered public accounting firm, has audited these consolidated financial statements in accordance with the standards of the Public Company Accounting Oversight Board (United States) and has expressed herein its unqualified opinion on these financial statements.

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Management's Report on Internal Control Over Financial Reporting

Management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act. U.S. Cellular's internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with accounting principles generally accepted in the United States of America ("GAAP"). U.S. Cellular's internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the issuer; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with GAAP, and that receipts and expenditures of the issuer are being made only in accordance with authorizations of management and, where required, the Board of Directors of the issuer; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the issuer's assets that could have a material effect on the interim or annual consolidated financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Under the supervision and with the participation of U.S. Cellular's management, including its principal executive officer and principal financial officer, U.S. Cellular conducted an evaluation of the effectiveness of its internal control over financial reporting as of December 31, 2014, based on the criteria established in the 2013 version of Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). Management has concluded that U.S. Cellular maintained effective internal control over financial reporting as of December 31, 2014 based on criteria established in the 2013 version of Internal Control—Integrated Framework issued by the COSO.

The effectiveness of U.S. Cellular's internal control over financial reporting as of December 31, 2014 has been audited by PricewaterhouseCoopers LLP, an independent registered public accounting firm, as stated in the firm's report included herein.

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Report of Independent Registered Public Accounting Firm

To the Board of Directors and Shareholders of United States Cellular Corporation:

In our opinion, based on our audits and the report of other auditors, the accompanying consolidated balance sheets and the related consolidated statements of operations, changes in equity, and cash flows present fairly, in all material respects, the financial position of United States Cellular Corporation and its subsidiaries at December 31, 2014 and 2013, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 2014 in conformity with accounting principles generally accepted in the United States of America. Also in our opinion, based on our audit, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2014, based on criteria established in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). The Company's management is responsible for these financial statements, for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management's Report on Internal Control over Financial Reporting. Our responsibility is to express opinions on these financial statements and on the Company's internal control over financial reporting based on our integrated audits. We did not audit the financial statements of Los Angeles SMSA Limited Partnership, a 5.5% owned entity accounted for by the equity method of accounting. The consolidated financial statements of United States Cellular Corporation reflect an investment in this partnership of $123,600,000 and $112,200,000 as of December 31, 2014 and 2013, respectively, and equity earnings of $71,800,000, $78,400,000 and $67,200,000 for each of the three years in the period ended December 31, 2014. The financial statements of Los Angeles SMSA Limited Partnership were audited by other auditors whose report thereon has been furnished to us, and our opinion on the financial statements expressed herein, insofar as it relates to the amounts included for Los Angeles SMSA Limited Partnership, is based solely on the report of the other auditors. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement and whether effective internal control over financial reporting was maintained in all material respects. Our audits of the financial statements included examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits and the report of other auditors provide a reasonable basis for our opinions.

A company's internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company's internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company's assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ PricewaterhouseCoopers LLP

Chicago, Illinois
February 25, 2015

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United States Cellular Corporation

SELECTED CONSOLIDATED FINANCIAL DATA

U.S. Cellular has not paid any cash dividends, except for a special cash dividend of $5.75 per share in June 2013, and currently intends to retain all earnings for use in U.S. Cellular's business.

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United States Cellular Corporation

CONSOLIDATED QUARTERLY INFORMATION (UNAUDITED)

 

U.S. Cellular has not paid any cash dividends, except for a special cash dividend of $5.75 per share in June 2013, and currently intends to retain all earnings for use in U.S. Cellular's business.

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United States Cellular Corporation

SHAREHOLDER INFORMATION

Stock and dividend information

U.S. Cellular's Common Shares are listed on the New York Stock Exchange under the symbol "USM" and in the newspapers as "US Cellu." As of January 31, 2015, the last trading day of the month, U.S. Cellular's Common Shares were held by approximately 311 record owners. All of the Series A Common Shares were held by TDS. No public trading market exists for the Series A Common Shares. The Series A Common Shares are convertible on a share-for-share basis into Common Shares.

U.S. Cellular has not paid any cash dividends, except for a special cash dividend of $5.75 per share in June 2013, and currently intends to retain all earnings for use in U.S. Cellular's business.

See "Consolidated Quarterly Information (Unaudited)" for information on the high and low trading prices of the USM Common Shares for 2014 and 2013.

Stock performance graph

The following chart provides a comparison of U.S. Cellular's cumulative total return to shareholders (stock price appreciation plus dividends) during the previous five years to the returns of the Standard & Poor's 500 Composite Stock Price Index and the Dow Jones U.S. Telecommunications Index. As of December 31, 2014, the Dow Jones U.S. Telecommunications Index was composed of the following companies: AT&T Inc., CenturyLink Inc., Frontier Communications Corp., Level 3 Communications Inc., SBA Communications Corp., Sprint Corp., T-Mobile US Inc., Telephone and Data Systems, Inc. (TDS), Verizon Communications Inc., and Windstream Holdings Inc.

*

Cumulative total return assumes reinvestment of dividends.

Assumes $100.00 invested at the close of trading on the last trading day preceding the first day of 2009, in U.S. Cellular Common Shares, S&P 500 Index and the Dow Jones U.S. Telecommunications Index.

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Investor relations

U.S. Cellular's annual report, SEC filings and news releases are available to investors, securities analysts and other members of the investment community. These reports are provided, without charge, upon request to our Corporate Office. Investors may also access these and other reports through the Investor Relations portion of the U.S. Cellular website (http://www.uscellular.com).

Questions regarding lost, stolen or destroyed certificates, consolidation of accounts, transferring of shares and name or address changes should be directed to:

Julie Mathews, Manager—Investor Relations
Telephone and Data Systems, Inc.
30 North LaSalle Street, Suite 4000
Chicago, IL 60602
312.592.5341
312.630.9299 (fax)
julie.mathews@tdsinc.com

General inquiries by investors, securities analysts and other members of the investment community should be directed to:

Jane W. McCahon, Vice President—Corporate Relations and Corporate Secretary
Telephone and Data Systems, Inc.
30 North LaSalle Street, Suite 4000
Chicago, IL 60602
312.592.5379
312.630.9299 (fax)
jane.mccahon@tdsinc.com

Directors and executive officers

See "Election of Directors" and "Executive Officers" sections of the Proxy Statement issued in 2015 for the 2015 Annual Meeting.

Principal counsel

Sidley Austin LLP, Chicago, Illinois

Transfer agent

Computershare Trust Company, N.A.
211 Quality Circle, Suite 210
College Station, TX 77845
312.360.5326

Independent registered public accounting firm

PricewaterhouseCoopers LLP

Visit U.S. Cellular's website at www.uscellular.com

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QuickLinks

UNITED STATES CELLULAR CORPORATION
ANNUAL REPORT TO SHAREHOLDERS FOR THE YEAR ENDED DECEMBER 31, 2014 Pursuant to SEC Rule 14a-3

Exhibit 13

United States Cellular Corporation and Subsidiaries
United States Cellular Corporation Management's Discussion and Analysis of Financial Condition and Results of Operations
United States Cellular Corporation Management's Discussion and Analysis of Financial Condition and Results of Operations
United States Cellular Corporation Management's Discussion and Analysis of Financial Condition and Results of Operations

INFLATION
RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS
LIQUIDITY AND CAPITAL RESOURCES

United States Cellular Corporation Management's Discussion and Analysis of Financial Condition and Results of Operations
United States Cellular Corporation Management's Discussion and Analysis of Financial Condition and Results of Operations
PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995 SAFE HARBOR CAUTIONARY STATEMENT

MARKET RISK

United States Cellular Corporation Consolidated Statement of Operations
United States Cellular Corporation Consolidated Statement of Cash Flows
United States Cellular Corporation Consolidated Balance Sheet—Assets
United States Cellular Corporation Consolidated Balance Sheet—Liabilities and Equity
United States Cellular Corporation Notes to Consolidated Financial Statements
Report of Independent Registered Public Accounting Firm
United States Cellular Corporation SELECTED CONSOLIDATED FINANCIAL DATA
United States Cellular Corporation CONSOLIDATED QUARTERLY INFORMATION (UNAUDITED)
United States Cellular Corporation SHAREHOLDER INFORMATION