TMUSP T-Mobile US - 5.50% Mandatory Convertible Preferred Stock, Series A

Item 1.01 – Entry into a Material Definitive Agreement.

T-Mobile USA, Inc. (“T-Mobile USA”), a direct, wholly-owned subsidiary of T-Mobile US, Inc. (the “Company”), recently completed the issuance of $4.0 billion in aggregate principal amount of high-yield notes to the Company’s majority stockholder Deutsche Telekom AG (“DT”). T-Mobile USA will use the proceeds from the issuance of the Notes (as defined below) to fund a portion of the purchase price of spectrum licenses won in the Federal Communications Commission (the “FCC”) 600 MHz spectrum auction due to the FCC.

On May 9, 2017, pursuant to the terms of several purchase agreements dated March 6, 2016, April 25, 2016 and April 29, 2016, respectively, in each case among T-Mobile USA, the guarantors party thereto (including the Company), and DT, T-Mobile USA issued to DT (i) $2.000 billion in aggregate principal amount of T-Mobile USA’s 5.300% Senior Notes due 2021 (the “2021 Notes”) for a purchase price of $2.000 billion, (ii) $1.350 billion in aggregate principal amount of T-Mobile USA’s 6.000% Senior Notes due 2024 (the “$1.350B 2024 Notes”) for a purchase price of approximately $1.391 billion and (iii) $650 million in aggregate principal amount of T-Mobile USA’s 6.000% Senior Notes due 2024 (the “$650M 2024 Notes”, together with the $1.350B 2024 Notes, the “2024 Notes” and together with the 2021 Notes, the “Notes”) for a purchase price of approximately $674 million.

T-Mobile USA was not required to pay any commitment fees, underwriting fees, new issuance concession or other compensation to DT in connection with the issuance and sale of the Notes, but was required to reimburse DT for its hedging costs related to its commitments.

The 2021 Notes were issued pursuant to an Indenture (the “Base Indenture”), dated as of April 28, 2013, among T-Mobile USA, the Company, the other guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee, as amended and supplemented by the Twenty-Ninth Supplemental Indenture, dated as of May 9, 2017 (the “Twenty-Ninth Supplemental Indenture”), among T-Mobile USA, the Company, the other guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee. The 2021 Notes will bear interest at a rate of 5.300% per year and mature on March 15, 2021. T-Mobile USA will pay interest on the 2021 Notes semiannually in arrears on each March 15 and September 15, commencing September 15, 2017.

The 2024 Notes were issued on the same terms as T-Mobile USA’s $1.000 billion in aggregate principal amount of 6.000% Senior Notes due 2024 which were issued on April 1, 2016, other than issue date, purchase price, initial interest payment date, registration rights and CUSIP number, pursuant to an Indenture (the “Base Indenture”), dated as of April 28, 2013, among T-Mobile USA, the Company, the other guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee, as amended and supplemented by (i) the Twenty-First Supplemental Indenture, dated as of April 1, 2016 (the “Twenty-First Supplemental Indenture”), among T-Mobile USA, the Company, the other guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee and (ii) the Thirtieth Supplemental Indenture, dated as of May 9, 2017 (the “Thirtieth Supplemental Indenture”), among T-Mobile USA, the Company, the other guarantors party thereto and Deutsche Bank Trust Company Americas, as trustee (the Base Indenture, as amended and supplemented by each of the Twenty-First Supplemental Indenture, the Twenty-Ninth Supplemental Indenture and the Thirtieth Supplemental Indenture, each an “Indenture” and, collectively, the “Indentures”). The 2024 Notes will bear interest at a rate of 6.000% per year and mature on April 15, 2024. T-Mobile USA will pay interest on each series of 2024 Notes semiannually in arrears on each April 15 and October 15, commencing October 15, 2017.

The Notes will initially be guaranteed on a senior unsecured basis by the Company and all of T-Mobile USA’s wholly-owned domestic restricted subsidiaries (excluding certain designated special purpose entities, a certain reinsurance subsidiary and immaterial subsidiaries), all of T-Mobile USA’s restricted subsidiaries that guarantee certain of its indebtedness, and any future subsidiary of the Company that directly or indirectly owns any of T-Mobile USA’s equity interests (the “Guarantors”). The Notes and the guarantees will be T-Mobile USA’s and the

Guarantors’ senior unsecured obligations and will rank equally in right of payment with all of T-Mobile USA’s and the Guarantors’ existing and future indebtedness and other liabilities that are not by their terms subordinated in right of payment to the Notes and the guarantees, and will rank senior in right of payment to any future indebtedness of T-Mobile USA or any Guarantor that provides by its terms that it is subordinated in right of payment to the Notes and the guarantees. The Notes and the guarantees will be effectively subordinated to all of T-Mobile USA’s and the Guarantors’ existing and future secured indebtedness to the extent of the assets securing such indebtedness, and will be structurally subordinated to all of the liabilities and preferred stock of any of T-Mobile USA’s subsidiaries that do not guarantee the Notes.

If T-Mobile USA experiences specific kinds of changes of control as set forth in the Indentures and any such change of control is accompanied or followed by rating downgrades during a specified period of time after the change of control, each holder of the 2021 Notes or 2024 Notes, as applicable, may require T-Mobile USA to repurchase all or a portion of the 2021 Notes or 2024 Notes, as applicable, so held at a price equal to 101% of the principal amount of such Notes, plus any accrued and unpaid interest on the Notes repurchased to, but not including, the date of repurchase.

The Indentures contain covenants that, among other things, restrict the ability of T-Mobile USA and its restricted subsidiaries to incur more debt, pay dividends and make distributions, make certain investments, repurchase stock, create liens or other encumbrances, enter into transactions with affiliates, enter into agreements that restrict dividends or distributions from subsidiaries, and merge, consolidate or sell, or otherwise dispose of, substantially all of their assets. These limitations are subject to a number of important qualifications and exceptions.

Each Indenture contains customary Events of Default (as defined in each Indenture), including:

Upon an Event of Default, the trustee or the holders of at least 25% in aggregate principal amount of the Notes of the applicable series then outstanding may declare all the Notes of such series to be due and payable immediately. In the case of Events of Default relating to bankruptcy, insolvency or reorganization, all outstanding Notes of the applicable series will become due and payable immediately without further action or notice.

The Notes were issued to DT without being registered under the Securities Act of 1933, as amended (the “Securities Act”), in reliance upon an exemption therefrom. The Company or T-Mobile USA will not be required to file a registration statement with the Securities and Exchange Commission (the “SEC”) providing for the registration under the Securities Act of the Notes prior to the date that is six months after the respective issuance dates of the Notes.

DT is the Company’s majority stockholder and a holder of a portion of T-Mobile USA’s outstanding debt, as further described in the Company’s periodic reports with the SEC.

This description of the Twenty-First Supplemental Indenture is a summary only and is qualified in its entirety by the full and complete terms of the Twenty-First Supplemental Indenture, which is filed as Exhibit 4.1 to the Current Report on Form 8-K filed on April 1, 2016 and incorporated herein by reference. This description of the Twenty-Ninth Supplemental Indenture and the Thirtieth Supplemental Indenture is a summary only and is qualified in its entirety by the full and complete terms of the Twenty-Ninth Supplemental Indenture and the Thirtieth Supplemental Indenture, which are filed as Exhibits 4.1 and 4.2, respectively, to this Current Report on Form 8-K and incorporated herein by reference.