AMENDED AND RESTATED EMPLOYMENT AGREEMENT effective April 1, 2017 (Effective Date) between T-Mobile US, Inc., (the Company) and John Legere (the Executive).

Duties.¹

Term.

the end of the Term,

the termination date provided in the written notice delivered by the Executive or the Company, as the case may be, pursuant to the provisions of paragraph 4,

the date of the Executive’s death or disability pursuant to the provisions of paragraph 4, or

the date determined by mutual agreement.

Compensation and Benefits.

Base Salary. The Executive shall be paid a base salary at an annual rate of $1,666,667, which salary shall be earned and payable at such intervals in conformity with the Company’s prevailing practice as such practice shall be established or modified from time to time. The compensation committee of the Board or a subcommittee thereof (the “Committee”) shall periodically review the amount of the Executive’s salary and may increase, but not decrease, such salary in its discretion.

Annual Performance Bonus. For each fiscal year of the Company during the Term beginning on or after January 1, 2017, the Executive shall have the opportunity to earn an annual lump sum cash performance bonus targeted at not less than $3,333,333, with a maximum award equal to 200% of the target, to be determined annually by the Committee based on performance goals established by the Committee in accordance with standard Company practices after consultation with the Executive. Such performance goals shall be established by the Committee generally by no later than March 31 of the applicable performance year. Payment of any performance bonus earned for a year shall be subject to the terms and conditions of the applicable bonus plan and made after the Committee determines performance results and at the same time as annual performance bonuses are paid to other senior managers of the Company, generally as soon as practicable following completion of the applicable performance year (but not later than March 15 of the year following the applicable performance year). Except as otherwise expressly provided by paragraph 5 below, the Executive must remain continuously employed with the Company through the applicable bonus payment date in order to earn the right to payment of the bonus, and any termination of employment before such bonus payment date shall result in cancellation of any right or entitlement to any such bonus. Notwithstanding any provision herein to the contrary but subject to the provisions of paragraph 5 below, annual performance bonus awards shall be under, and subject to the terms of, the Incentive Plan, including provisions regarding treatment of any outstanding awards in connection with a Change in Control Event, which terms shall be no less favorable than applicable to all other Executive-Level Employees of the Company.

Long-Term Incentive Awards. Within fifteen (15) days following the execution of this Agreement, the Company shall grant to the Executive, under the Incentive Plan, a one-time award of performance-based restricted stock units (“PRSUs”) with respect to a number of shares of Company common stock equal to the quotient of $3,000,000 divided by the average closing price of the Company’s common stock for the 30 calendar-day period ending five business days prior to February 25, 2017, rounded up to the nearest whole share (such PRSUs, the “True-Up PRSUs”). The True-Up PRSUs shall be subject to the same vesting schedule and other terms and conditions

Paid Time Off, and Other Benefits. During the term of this Agreement, the Executive shall be eligible for Paid Time Off (PTO) according to the terms the Company’s policies. As of the Effective Date, such policies include an entitlement to 4.8 weeks of vacation per year. In addition, except as specifically provided to the contrary in this Agreement, the Executive shall be provided with benefits to the same extent and on the same terms as those benefits are generally provided by the Company to its senior managers. Notwithstanding anything herein to the contrary, the Executive shall not participate in the Company’s Executive Continuity Plan or any other severance plan or program, other than the right to receive severance benefits subject to, and in accordance with, the provisions of paragraph 5 below.

Business Expenses. The Executive shall be reimbursed, in a manner consistent with the policies of the Company, for all reasonable business expenses incurred in the performance of Executive’s duties pursuant to this Agreement, to the extent such expenses are substantiated in writing, and are consistent with the general policies of the Company relating to the reimbursement of expenses of Executive-Level Employees of the Company.

Deduction and Withholding. All compensation and other benefits to or on behalf of the Executive pursuant to this Agreement shall be subject to such deductions and withholding as may be agreed to by the Executive or required by applicable law, rule or regulation or Company policy.

No Requirement for Continuation or Establishment of Benefits. Without intending to limit the Company’s obligations made under this Agreement, nothing herein contained shall be construed as requiring the Company to establish or continue any particular benefit plan in discharge of its obligations under this Agreement.

Compensation Recoupment Policy. The Executive acknowledges and agrees that any incentive compensation provided by the Company to the Executive under this Agreement or otherwise may be subject to recovery by the Company under and in accordance with the Company’s Executive Incentive Compensation Recoupment Policy as adopted October 30, 2014, as amended from time to time.

Valuation and Tax Advice. During the Term and thereafter, whether before or after the Executive’s termination of employment from the Company, in the event that any payments or benefits from the Company to the Executive are or may become subject to excise taxes under Section 4999 of the Code, within 20 days after receiving a request for such assistance from the Executive, the Company’s current independent public accounting firm, or such other nationally recognized public accounting firm as the parties may mutually agree, may be engaged by the Executive to provide valuation and tax advice to the Executive with respect to payments and benefits that are or may become payable under this Agreement in connection with a Change in Control Event. Such advice shall include the provision of a report showing the amount of such excise taxes that may become payable by or on behalf of the Executive, along with detailed supporting calculations. All fees and expenses of such accounting firm shall be borne by the Company.

Termination.

Termination by Company for Cause. The Company may terminate the Executive’s employment for “Cause” (as defined below in this paragraph 4(a)) immediately upon written notice to the Executive. Such notice shall specify in reasonable detail the nature of the Cause and the Termination Date. For purposes of this Agreement and all Company plans, arrangements or programs in which the Executive is or becomes a participant, “Cause” shall mean:

The Executive’s gross neglect or willful material breach of the Executive’s principal employment responsibilities or duties,

A final judicial adjudication that the Executive is guilty of any felony (other than a law, rule or regulation relating to a traffic violation or other similar offense that has no material adverse effect on the Company, DT or their respective Affiliates),

The Executive’s breach of any non-competition, non-solicitation or confidentiality covenant between the Executive and the Company or any Affiliate of the Company,

Fraudulent conduct as determined by a court of competent jurisdiction in the course of the Executive’s employment with the Company or any of its Affiliates,

The Executive’s unlawful discrimination, harassment, or retaliation, assault or other violent act toward any employee or third party, or other act or omission, in each case that in the view of the Board constitutes a material breach of the Company’s written policies or Code of Conduct, or

The material breach by the Executive of any other obligation which continues uncured for a period of thirty (30) days after notice thereof by the Company or any of its Affiliates. Notwithstanding the foregoing, no cure period shall be

Termination by Company Other Than For Cause. The Company shall have the right to terminate the Executive’s employment for any reason or no reason by giving the Executive written notice at least ninety (90) days in advance of the applicable Termination Date, unless the Company and the Executive mutually agree to an earlier or later Termination Date.

Termination by Executive Without Good Reason. The Executive may terminate his employment without Good Reason (as defined in paragraph 4(d) below), upon written notice to the Company at least ninety (90) days in advance of the applicable Termination Date, unless the Company and the Executive mutually agree to an earlier or later Termination Date.

Termination by Executive With Good Reason. The Executive may terminate his employment with Good Reason, effective as of such date specified in the Executive’s written notice to the Company described below, but not earlier than the expiration of the applicable cure period, unless the Company and the Executive mutually agree to an earlier Termination Date. For purposes of this Agreement and all Company plans, arrangements or programs in which the Executive is or becomes a participant, “Good Reason” shall mean any of the events listed in subparagraphs (i) through (v) below, which occurs without the Executive’s express written consent. In order to terminate his employment for Good Reason, the Executive must notify the Company of the occurrence of the applicable event in writing not more than ninety (90) days after the initial existence thereof. If the Company does not cure such event within thirty (30) days after receipt of such notice, the Executive may thereafter terminate his employment for Good Reason within sixty (60) days after expiration of the Company’s cure period upon written notice of such termination to the Company. The events which shall constitute Good Reason are:

a material diminution in the Executive’s base compensation, annual performance bonus target, or long-term incentive target or in the maximum potential amount payable with respect to any annual bonus or long-term incentive award provided for under this Agreement;

a material diminution in the Executive’s authority, duties or responsibilities, including, without limitation, any change in title or the appointment of any person as a result of which the Executive ceases to be the Company’s sole CEO, provided that it will not be Good Reason if, in connection with a Change in Control Event, Executive reports to the Board rather than the Chairman of the Board;

a material diminution in the authority, duties or responsibilities of the supervisor to whom the Executive is required to report (including a requirement that the

a change of fifty (50) miles or greater in the principal geographic location at which the Executive must perform services; or

any other action or inaction that constitutes a material breach by the Company or its successor company, as applicable, of this Agreement or any other agreement under which the Executive provides services to the Company or the successor company, as applicable.

Termination due to Death or Disability. The Executive’s employment pursuant to this Agreement shall terminate automatically on the date of the Executive’s death or disability. The Termination Date shall be, as applicable, the date of the Executive’s death or the date of the Executive’s disability as determined by the method provided below. For purposes of this Agreement, the Executive shall be deemed to be disabled on the earlier of: (1) the date on which it is medically determined by the Company (following review by its third party medical and other advisors as determined appropriate by the Company in its discretion) that the Executive is not capable of performing the services contemplated by this Agreement and is not expected to be able to perform such services for an indefinite period or for a period in excess of one hundred twenty (120) days; or (2) if the Executive fails because of illness or other incapacity, to render the services contemplated by this Agreement for a period of one hundred twenty (120) consecutive days or any series of shorter periods aggregating to one hundred fifty (150) days in any consecutive period of twelve (12) months, unless in either case under clauses (1) or (2) above, with reasonable accommodation the Executive could continue to perform his duties under this Agreement and making these accommodations would not pose an undue burden on the Company as determined by the Board.

Effect of Termination.

Termination by Company for Cause; Termination by Executive Without Good Reason. If the Executive’s employment with the Company is terminated (x) by the Company for Cause pursuant to paragraph 4(a) above, (y) by the Executive without Good Reason pursuant to paragraph 4(c) above or (z) as a result of non-renewal of the Agreement by notice given by the Executive under paragraph 2 above, then the Executive shall be entitled to receive:

An amount equal to his base salary at the rate then in effect, through the Termination Date; plus

PTO as accrued through the Termination Date; plus

Any vested benefits or entitlements under any employee benefit plans of the Company in which the Executive participates (e.g., vested 401(k) plan balances, rights to COBRA continuation coverage under group medical plans, etc.), subject to the terms and conditions of such plans.

Termination by Company Other Than For Cause; Termination by Executive With Good Reason. If the Executive’s employment with the Company is terminated (x) by the Company other than for Cause pursuant to paragraph 4(b) above, (y) by the Executive with Good Reason pursuant to paragraph 4(d) above or (z) as a result of non-renewal of the Agreement by notice given by the Company under paragraph 2 above (provided that, at the time of such non-renewal, the Executive is willing and able to continue providing services to the Company on terms and conditions substantially similar to those set forth in this Agreement), then the Executive shall be entitled to receive:

The Accrued Benefits; plus

A severance payment in an amount equal to two times the sum of (A) the Executive’s annual rate of salary in effect immediately prior to the Termination Date and (B) the Executive’s target annual performance bonus under paragraph 3(b) above for the fiscal year in which the Termination Date occurs; plus

Any annual performance bonus under paragraph 3(b) above for the last fiscal year of the Company preceding the Termination Date that is unpaid as of the Termination Date, irrespective of whether the Executive is employed on the normal payment date; plus

A pro rata annual performance bonus under paragraph 3(b) above for the fiscal year of the Company in which the Termination Date occurs, based on the number of days in the fiscal year through the Termination Date divided by 365 and based on actual performance results for the fiscal year in which the Termination Date occurs (or, if the Termination Date occurs upon or within 24 months following a Change in Control Event, based on target performance for the fiscal year in which the Termination Date occurs); plus

For any long term incentive or other equity awards under the Incentive Plan, and notwithstanding anything to the contrary in the applicable award agreement(s):

any outstanding award that is not subject to any performance vesting condition as of the Termination Date (including any time-based RSUs) shall vest in full as of the Termination Date, and

any outstanding award that is subject to any performance vesting condition as of the Termination Date (including any PRSUs, except as otherwise set forth in clause (C) below) will become earned and vested as of the Termination Date based on the level of actual performance determined as if the applicable performance period had ended as of the last trading day immediately preceding the Termination Date; provided, however, that if the Termination Date occurs upon or within 12 months following a Change in Control Event, such performance awards (including any PRSUs, except as otherwise set forth in clause (C) below) shall instead become earned and vested as of the Termination Date based on the greater of (i) target or (ii) the actual level of performance determined as if the applicable performance period had ended as of the last trading day immediately preceding the Change in Control Event, in each case, with such vested and earned

With respect only to the True-Up PRSUs and the Incremental PRSUs, the accelerated vesting provisions described in clause (B) above shall be subject to the Executive’s satisfactory participation and cooperation in succession planning (including, without limitation, the Executive’s cooperation in an orderly transition of duties and responsibilities to his successor) after the provision of notice of the termination of the Executive’s employment (i) by the Company other than for Cause, (ii) by the Executive with Good Reason or (iii) as a result of non-renewal of the Agreement by the Company (as applicable) and continuing through and including the Termination Date. Whether the Executive has provided such satisfactory participation and cooperation shall be determined by the Committee in its good faith sole discretion.

Death or Disability. If the Executive’s employment with the Company is terminated due to the Executive’s death or disability under paragraph 4(e) above, then the Executive (or, in case of death, the Executive’s beneficiary under the applicable plan, or the Executive’s estate if there is no such beneficiary) shall be entitled to receive:

The Accrued Benefits; plus

Any annual performance bonus under paragraph 3(b) above for the last fiscal year of the Company preceding the Termination Date that is unpaid as of the Termination Date; plus

A pro rata annual performance bonus under paragraph 3(b) above for the fiscal year in which the Termination Date occurs, at target and based on the number of days in the fiscal year through the Termination Date divided by 365; plus

For any long-term incentive or other equity awards under the Incentive Plan, vesting of any outstanding awards shall be determined under and in accordance with the terms of the Incentive Plan and applicable award agreement, which terms shall be no less favorable than applicable to all other Executive-Level Employees of the Company.

Non-Duplication. Other than as described above in this paragraph 5, the Executive shall not be entitled to any payment, benefit, damages, award or compensation in connection with the Executive’s termination of employment, by either the Company or the Executive, except as may be expressly provided in another written agreement, if any, approved by the Board and executed by the Executive and the Company. Neither the Executive nor the Company is obligated to enter into any such other written agreement. The Executive shall not be entitled to severance benefits under this Agreement except as provided in paragraphs 5(a) through (c) above, and only to the extent provided in the applicable paragraph (i.e., severance benefits shall not be payable under more than one paragraph above).

No Mitigation; No Offset. In the event of any termination of employment under this Agreement, the Executive shall be under no obligation to seek other employment or to mitigate damages, and there will be no offset against amounts due to the Executive under this Agreement for any reason, including without limitation, on account of any remuneration attributable to any subsequent employment that the Executive may obtain.

Certain Definitions. For purposes of this Agreement, the following terms shall have the following meanings:

“Affiliate” means any entity currently existing or subsequently organized or formed that directly or indirectly controls, is controlled by or is under common control with a named organization, or any entity in which the named organization holds a controlling interest, whether through the ownership of voting securities, member interests, by contract or otherwise. For this purpose, “control” shall be deemed to exist when more than 50% of the voting power for the election of the directors (or similar governing body) of the entity or of the capital stock (or other equity interests) of the entity is owned, directly or indirectly, by another person, or other entity.

“Change in Control Event” means the occurrence of a “Change in Control” as defined under the T-Mobile US, Inc. 2013 Omnibus Incentive Plan (or any successor plan thereto).

“Executive-Level Employee” means an “executive officer” of the Company (as defined in Rule 16a-1(f) under the Securities Exchange Act of 1934).

“Incentive Plan” means the T-Mobile US, Inc. 2013 Omnibus Incentive Plan, as in effect from time to time (and any successor plan thereto).

Payments in Cash. Unless otherwise specifically indicated, all payments under paragraph 5 of this Agreement will be made in cash.

Restrictive Covenant and Confidentiality Agreement.

Responsibilities Upon Termination.

Tax Matters.

280G. In the event any payment, benefit or distribution of any type to or for the benefit of the Executive, whether paid or payable, provided or to be provided, or distributed or distributable pursuant to the terms of this Agreement or otherwise to the Executive under this Agreement or otherwise constitutes a “parachute payment” under Section 280G of the Internal Revenue Code of 1986, as amended (the “Code”), the amount payable to the Executive shall be either (a) paid in full, or (b) paid after reduction by the smallest amount as would result in no portion thereof being subject to the excise tax under Section 4999 of the Code, whichever of the foregoing amounts, taking into account the applicable federal, state and local income taxes and the excise tax under Section 4999 of the Code, results in the receipt by the Executive, on an after-tax basis, of the greater net value, notwithstanding that all or some portion of such payment amount may be taxable under Section 4999 of the Code. Unless the Company and the Executive otherwise agree in writing, all determinations required to be made under this paragraph 8(a), including the manner and amount of any reduction in the Participant’s payments hereunder, and the assumptions to be utilized in arriving at such determinations, shall be made in writing in good faith by the accounting firm serving as the Company’s independent public accounting firm immediately prior to the event giving rise to such payment (the “Accounting Firm”); provided, however, that no such reduction or elimination shall apply to any non-qualified deferred compensation amounts (within the meaning of Section 409A of the Code) to the extent such reduction or elimination would accelerate or defer the timing of such payment in manner that does not comply with Section 409A of the Code. For purposes of making the calculations required by this paragraph 8(a), the Accounting Firm may make reasonable assumptions and approximations concerning the application of Sections 280G and 4999 of the Code. The Company and the Executive shall furnish to the Accounting Firm such information and documents as the Accounting Firm may reasonably request to make a determination under this paragraph 8(a). The Accounting Firm shall provide its written report to the Committee and the Executive which shall include information regarding methodology. The Company shall bear all costs the Accounting Firm may reasonably incur in connection with any calculations contemplated by this paragraph 8(a). The Executive and the Company shall cooperate in case of a potential Change in Control Event to consider alternatives to mitigate any Section 280G exposure, although the Company cannot guaranty any such alternatives will be available or approved by the Company and neither the Executive nor the Company shall be obligated to enter into them.

409A. To the extent that any payment or benefit due to the Executive under this Agreement provides for the payment of non-qualified deferred compensation, the intent of the parties is that payments and benefits under this Agreement comply with Section 409A of the Code (“Section 409A”) and, accordingly, to the maximum extent permitted, this Agreement shall be interpreted and be administered to be in compliance therewith. Notwithstanding anything contained herein to the contrary, to the extent required in order to avoid accelerated taxation and/or tax penalties under Section 409A, the Executive shall not be considered to have terminated employment

General.

Survival. The covenants of the Executive and the Company in this Agreement and in the agreements referenced herein, including but not limited to the covenants imposed upon the Executive in the Restrictive Covenant and Confidentiality Agreement, shall survive the Termination Date.

Notices. Unless and until some other address has been designated, all notices, consents, demands and other communications provided for by or relating to this Agreement shall be addressed as follows and shall be in writing and shall be deemed to have been given at the time the same is delivered in person or is mailed by registered or certified mail:

Dispute Resolution. Except for any claims arising out of, or relating to, the Restrictive Covenant and Confidentiality Agreement attached hereto, any controversy, claim or dispute arising out of or relating to the Executive’s employment with the Company either during the existence of the employment relationship or afterwards, and including, but not limited to, any common law or statutory claims for wrongful discharge, discrimination or unpaid compensation, shall be resolved exclusively by arbitration in King County, Washington. Arbitration shall be conducted in accordance with the now prevailing commercial arbitration rules of the American Arbitration Association (the “AAA”), with one arbitrator designated in accordance with those rules. The parties agree to abide by all decisions and awards rendered in such proceedings. Such decisions and awards rendered by the arbitrator shall be final and conclusive and may be entered in any court having jurisdiction thereof as a basis of judgment and of the issuance of execution for its collection. All such controversies, claims or disputes shall be settled in this manner in lieu of any action at law or equity; provided, however, that nothing in this paragraph 9(c) shall be construed as precluding the Company from bringing an action for injunctive relief or other equitable relief. In any such dispute, the prevailing party shall be entitled to its or his attorneys’ fees and costs, in addition to any other relief that may be awarded. The exclusive venue for claims arising out of, or related to, the Restrictive Covenant and Confidentiality Agreement, shall be the state and Federal courts of King County, Washington.

Governing Law. This Agreement shall be exclusively governed by and interpreted under the laws of the State of Washington.

Waiver. The waiver or failure of either party to insist in any one or more instances upon performance of any term, covenant or condition of this Agreement shall not be construed as a waiver of future performance of any such term, covenant or condition, but the obligations of either party with respect to such term, covenant or condition shall continue in full force and effect. No course of dealing shall be implied or arise from any waiver or series of waivers of any right or remedy hereunder.

Severability. Each provision of this Agreement shall be interpreted where possible in a manner necessary to sustain its legality and enforceability. If any provision of this Agreement shall be unenforceable or invalid under applicable law, such provision shall be limited to the minimum extent necessary to render the same enforceable or valid. The unenforceability of any provision of this Agreement in a specific situation, or the unenforceability of any portion of any provision of this Agreement in a specific situation, shall not affect the enforceability of

that provision or portion of provision in another situation or

the other provisions or portions of provisions of this Agreement if such other provisions or the remaining portions could then continue to conform with the purposes of this Agreement and the terms and requirements of applicable law.

Amendments. This Agreement shall not be amended orally, but only by a written instrument executed only by the Chairman of the Board or the Chair of the Compensation Committee of the Board, on the one hand, and the Executive, on the other.

Entire Agreement. This Agreement, along with any other agreements expressly incorporated by reference herein, embody the entire agreement and understanding between the parties with respect to the subject matter hereof and supersedes all prior oral and written agreements and understandings between the Company and the Executive with respect to the subject matter hereof, including, without limitation, the Original Agreement and the prior related term sheet. To the extent the provisions of this Agreement are inconsistent with the terms of any underlying compensation plan or program, including without limitation any annual performance bonus plan or the Incentive Plan, the terms of this Agreement shall control.

Free and Voluntary Act. The Executive agrees that he is entering into this Agreement as a free and voluntary act and that he has been given adequate time to decide whether or not to sign the Agreement and signs it only after full reflection and analysis. The Executive further acknowledges that the Executive has been given an opportunity to obtain an attorney’s independent counsel and advice, and that the Executive has read and understands the complete Agreement. Each party agrees that they have cooperated in the drafting and preparation of this Agreement; any construction of this Agreement shall not be construed against any party as drafter.

Indemnification. The Executive shall be covered by the Company’s indemnification provisions and directors and officers insurance policies generally applicable to Company executives and directors. Subject to the terms and conditions of such provisions and policies, these provisions and policies shall continue to apply to the Executive after any termination of employment with respect to his service prior to termination of employment, on the same basis as for other former officers and directors.

Legal Fees. The Company shall promptly reimburse the Executive for his legal fees incurred in connection with this Agreement, and any agreement referenced herein, including, without limitation applicable grant agreements, the NDA agreement and the prior related term sheet, not to exceed $25,000, upon reasonable documentation.

Binding Effect: Successors. This Agreement shall inure to the benefit of and shall be binding upon the Company and its successors, assigns and legal representatives and the Executive, his heirs and legal representatives. The Company will cause any successor following a Change in Control Event to assume Company’s obligations under this Agreement, and failure to do so shall constitute a material breach of this Agreement unless otherwise agreed to by the Executive and the successor company. The Executive may not assign, transfer, or otherwise dispose of this Agreement, or any of his other rights or obligations hereunder (other than his rights to payments hereunder, which may be transferred only by will or by the laws of descent and distribution), without the prior written consent of the Company, and any such attempted assignment, transfer or other disposition without such consent shall be null and void.

Counterparts. This Agreement may be executed in two or more counterparts, each of which shall be deemed to be an original but all of which together shall constitute one and the same instrument. The execution of this Agreement may be by actual or facsimile signature.

Authority and Ratification. The Company represents that it has obtained all approvals, including Board and Compensation Committee approvals, required to enter