TMUS 10-Q Quarterly Report March 31, 2020

T-MOBILE US, INC.

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TABLE OF CONTENTS

Part I. Financial Information Item 1. Financial Statements Note 1 Summary Of Significant Accounting Policies Note 2 Business Combination Note 3 Receivables and Expected Credit Losses Note 4 Sales Of Certain Receivables Note 5 - Spectrum License Transactions Note 6 Fair Value Measurements Note 7 Debt Note 8 Revenue From Contracts with Customers Note 9 Earnings Per Share Note 10 - Leases Note 11 Commitments and Contingencies Note 12 Subsequent Events Item 2. Management S Discussion and Analysis Of Financial Condition and Results Of Operations Item 3. Quantitative and Qualitative Disclosures About Market Risk Item 4. Controls and Procedures Part II. Other Information Item 1. Legal Proceedings Item 1A. Risk Factors Item 2. Unregistered Sales Of Equity Securities and Use Of Proceeds Item 3. Defaults Upon Senior Securities Item 4. Mine Safety Disclosures Item 5. Other Information Item 6. Exhibits

Exhibits

2.1* Amendment No. 2, dated as of February 20, 2020, to the Business Combination Agreement, dated as of April 29, 2018, by and among T-Mobile US, Inc., Huron Merger Sub LLC, Superior Merger Sub Corporation, Sprint Corporation, Starburst I, Inc., Galaxy Investment Holdings, Inc., and for the limited purposes set forth therein, Deutsche Telekom AG, Deutsche Telekom Holding B.V., and SoftBank Group Corp., as amended. 8-K 2/20/2020 2.1 3.1 Fifth Amended and Restated Certificate of Incorporation of T-Mobile US, Inc. 8-K 4/1/2020 3.1 3.2 Seventh Amended and Restated Bylaws of T-Mobile US, Inc. 8-K 4/1/2020 3.2 10.1 Second Amendment to the Third Amended and Restated Receivables Purchase and Administration Agreement, dated as of February 14, 2020, among T-Mobile Handset Funding LLC, as transferor, T-Mobile Financial LLC, as servicer, T-Mobile US, Inc. and T-Mobile USA, Inc., jointly and severally as guarantors, Royal Bank of Canada, as Administrative Agent, and the various funding Agents party to the RPAA. 10.2 Letter Agreement, dated as of February 20, 2020, by and among T-Mobile US, Inc., Deutsche Telekom AG and SoftBank Group Corp. 8-K 2/20/2020 10.1 10.3** Amendment No. 1, effective as of February 12, 2020, to the Compensation Term Sheet, effective as of April 29, 2018, by and between the Company and David R. Carey. 10.4** PRSU Agreement, dated as of April 1, 2020, by and between the Company and Neville R. Ray. 10.5** Amendment No. 2, dated as of March 26, 2020, to the Amended and Restated Employment Agreement, dated as of April 1, 2017, by and between the Company and John J. Legere. 10.6** Amendment No. 1, dated as of March 26, 2020, to the Amended and Restated Employment Agreement, dated as of November 15, 2019, by and between the Company and G. Michael Sievert. 10.7** Form of Restricted Stock Unit Award Agreement (Time-Vesting) for Executive Officers under the T-Mobile US, Inc. 2013 Omnibus Incentive Plan. 10.8** Form of Restricted Stock Unit Award Agreement (Performance-Vesting) for Executive Officers under the T-Mobile US, Inc. 2013 Omnibus Incentive Plan. 22.1 List of Guarantor Subsidiaries 31.1 Certifications of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. 31.2 Certifications of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. 32.1*** Certificationof Chief Executive Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. 32.2*** Certification of Chief Financial Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

Customer name	Ticker
Amazon.com, Inc.	AMZN
Big Lots, Inc.	BIG

TMUS 10-Q Quarter ended March 31, 2020

Exhibits