TMUS 10-Q Quarterly Report June 30, 2018

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 8 - Tower Obligations Note 1 - Summary Of Significant Accounting Policies Note 2 - Significant Transactions Note 3 - Business Combinations Note 4 Receivables and Allowance For Credit Losses Note 5 Sales Of Certain Receivables Note 6 - Goodwill Note 7 Spectrum License Transactions Note 8 Fair Value Measurements Note 9 Debt Note 10 - Employee Compensation and Benefit Plans Note 11 - Revenue From Contracts with Customers Note 12 Repurchases Of Common Stock Note 13 Earnings Per Share Note 14 Commitments and Contingencies Note 15 Guarantor Financial Information Note 8 Tower Obligations 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* 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. 8-K 04/30/2018 2.1 4.1 Thirty-Fourth Supplemental Indenture, dated as of April 26, 2018, by and among T-Mobile USA, Inc., T-Mobile US, Inc., the other guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee. 10-Q 05/01/2018 4.5 4.2 Thirty-Fifth Supplemental Indenture, dated as of April30, 2018, by and amongT-MobileUSA, Inc.,T-MobileUS, Inc., the other guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee, including the Form of 4.500% Senior Note due2026-1. 8-K 05/04/2018 4.1 4.3 Thirty-Sixth Supplemental Indenture, dated as of April 30, 2018, by and among T-Mobile USA, Inc., T-Mobile US, Inc., the other guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee, including the Form of 4.750% Senior Note due 2028-1. 8-K 05/04/2018 4.2 4.4 Thirty-Seventh Supplemental Indenture, dated as of May20, 2018, by and among T-Mobile USA,Inc., the guarantors party thereto, and Deutsche Bank Trust Company Americas. 8-K 05/21/2018 4.1 10.1 Support Agreement, dated as of April 29, 2018, by and among SoftBank Group Corp., SoftBank Group Capital Limited, Starburst I, Inc., Galaxy Investment Holdings, Inc., T-Mobile US, Inc., and Deutsche Telekom AG. 8-K 04/30/2018 10.1 10.2 Commitment Letter, dated as of April 29, 2018, by and among T-Mobile USA, Inc. and the financial institutions party thereto. 8-K 04/30/2018 10.2 10.3 Amended and Restated Commitment Letter, dated as of May15, 2018, by and among T-Mobile USA,Inc. and the financial institutions party thereto. 8-K 05/17/2018 10.1 10.4 Financing Matters Agreement, dated as of April 29, 2018, by and between T-Mobile USA, Inc. and Deutsche Telekom AG. 8-K 04/30/2018 10.3 10.5** Form of Severance Letter Agreement. 10-Q 05/01/2018 10.9 10.6** First Amendment, dated as of April 28, 2018, to Amended and Restated Employment Agreement, dated as of April 1, 2017, between T-Mobile US, Inc. and John Legere. 10-Q 05/01/2018 10.10 10.7** First Amendment, dated as of April 28, 2018, to Updated Compensation Term Sheet, dated as of January 1, 2017, between T-Mobile US, Inc. and Michael Sievert. 10-Q 05/01/2018 10.11 10.8** First Amendment, dated as of April 28, 2018, to Amended and Restated Employment Agreement, dated as of December 20, 2017, between T-Mobile US, Inc. and J. Braxton Carter. 10-Q 05/01/2018 10.12 10.9 First Amendment, dated as of April 3, 2018, to Third Amended and Restated Master Receivables Purchase Agreement, dated as of February 5, 2018, among T-Mobile Airtime Funding LLC, as funding seller, Billing Gate One LLC, as purchaser, Landesbank Hessen-Thringen Girozentrale, as bank purchasing agent, MUFG Bank (Europe) N.V, Germany Branch, as bank collection agent, T-Mobile PCS Holdings LLC, as servicer, and T-Mobile US, Inc. and T-Mobile USA, Inc., as performance guarantors. 10-Q 05/01/2018 10.13 10.10 Second Amendment, dated as of April 3, 2018, to the Second Amended and Restated Receivables Purchase and Administrative Agreement, dated as of August 21, 2017, among T-Mobile Handset Funding LLC, as transferor, T-Mobile Financial LLC, as servicer, T-Mobile US, Inc. and T-Mobile USA, Inc., as performance guarantors, Royal Bank of Canada, as administrative agent, and certain financial institutions party thereto. 10-Q 05/01/2018 10.14 31.1 Certifications of Chief Executive Officer Pursuant toSection302 of the Sarbanes-Oxley Act of 2002. 31.2 Certifications of Chief Financial Officer Pursuant toSection302 of the Sarbanes-Oxley Act of 2002. 32.1*** Certification of Chief Executive Officer Pursuant toSection906 of the Sarbanes-Oxley Act of 2002. 32.2*** Certification of Chief Financial Officer Pursuant toSection906 of the Sarbanes-Oxley Act of 2002.

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

TMUS 10-Q Quarter ended June 30, 2018

Exhibits