Sec Form 4 Filing - Datar Srikant M. @ T-Mobile US, Inc. - 2020-07-13

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Datar Srikant M. 2. Issuer Name and Ticker or Trading Symbol T-Mobile US, Inc. [ TMUS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O T-MOBILE US, INC., 12920 SE 38TH STREET 3. Date of Earliest Transaction (MM/DD/YY) 07/13/2020 (Street) BELLEVUE, WA98006 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 07/13/2020 M 300 ( 1 ) A $ 103 13,724 I By Safari LLC ( 2 ) Common Stock 07/14/2020 M 200 ( 1 ) A $ 103 8,200 I By Datar Investment LLC ( 3 ) Common Stock 15,989 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Subscription Rights (right to buy) ( 4 ) $ 103 07/13/2020 S 8,593 ( 5 ) ( 6 ) Common Stock 8,593 $ 0.1715 ( 7 ) 5,000 D Subscription Rights (right to buy) ( 4 ) $ 103 07/13/2020 S 7,424 ( 5 ) ( 6 ) Common Stock 7,424 $ 0.179 6,000 I Safari Investment LLC Subscription Rights (right to buy) ( 4 ) $ 103 07/13/2020 X 6,000 ( 5 ) ( 6 ) Common Stock 6,000 $ 103 0 I Safari Investment LLC Subscription Rights (right to buy) ( 4 ) $ 103 07/14/2020 S 4,000 ( 5 ) ( 6 ) Common Stock 4,000 $ 0.185 4,000 I Datar Investment LLC Subscription Rights (right to buy) $ 103 07/14/2020 X 4,000 ( 5 ) ( 6 ) Common Stock 4,000 $ 103 0 I Datar Investment LLC

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Datar Srikant M. C/O T-MOBILE US, INC. 12920 SE 38TH STREET BELLEVUE, WA98006 X Signatures /s/ Frederick Williams, Attorney-in-Fact 07/15/2020 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Shares acquired through the exercise of subscription rights, at a rate of .05 shares of common stock per subscription right exercised. ( 2 )The reporting person and his spouse gifted all of the interests in Safari LLC to trusts for the benefit of their adult children. The reporting person and his spouse continue to serve as managers of Safari LLC. The reporting person disclaims beneficial ownership of the shares of T-Mobile US, Inc. common stock held by Safari LLC except to the extent of his pecuniary interest therein, if any. ( 3 )The reporting person and his spouse gifted all of the interests in Datar Investment LLC to trusts for the benefit of their adult children. The reporting person and his spouse continue to serve as managers of Datar Investment LLC. The reporting person disclaims beneficial ownership of the shares of T-Mobile US, Inc. common stock held by Safari LLC except to the extent of his pecuniary interest therein, if any. ( 4 )The subscription rights sold were distributed by T-Mobile US, Inc. in a transaction exempt under Exchange Act Rule 16a-9(b). ( 5 )The rights offering commenced on June 26, 2020. ( 6 )The rights offering will expire at 5:00 p.m., Eastern time, on July 27, 2020 unless extended by T-Mobile US, Inc. ( 7 )The price reported in Column 8 is a weighted average price. These subscription rights were sold in multiple transactions ranging from $0.17 to $0.172, inclusive. The reporting person undertakes to provide to the Securities and Exchange Commission, T-Mobile US, Inc. or any security holder of T-Mobile US, Inc., upon request, full information regarding the number of subscription rights sold at each separate price within the range.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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