<SEC-DOCUMENT>0001283699-21-000116.txt : 20210604
<SEC-HEADER>0001283699-21-000116.hdr.sgml : 20210604
<ACCEPTANCE-DATETIME>20210604162206
ACCESSION NUMBER:		0001283699-21-000116
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210603
FILED AS OF DATE:		20210604
DATE AS OF CHANGE:		20210604

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Datar Srikant M.
		CENTRAL INDEX KEY:			0001376436

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33409
		FILM NUMBER:		21996745

	MAIL ADDRESS:	
		STREET 1:		ICF INTERNATIONAL, INC.
		STREET 2:		9300 LEE HIGHWAY
		CITY:			FAIRFAX
		STATE:			VA
		ZIP:			22031

	FORMER NAME:	
		FORMER CONFORMED NAME:	Datar Srikant
		DATE OF NAME CHANGE:	20060925

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			T-Mobile US, Inc.
		CENTRAL INDEX KEY:			0001283699
		STANDARD INDUSTRIAL CLASSIFICATION:	RADIO TELEPHONE COMMUNICATIONS [4812]
		IRS NUMBER:				200836269
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		12920 SE 38TH STREET
		CITY:			BELLEVUE
		STATE:			WA
		ZIP:			98006
		BUSINESS PHONE:		800-318-9270

	MAIL ADDRESS:	
		STREET 1:		12920 SE 38TH STREET
		CITY:			BELLEVUE
		STATE:			WA
		ZIP:			98006

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	METROPCS COMMUNICATIONS INC
		DATE OF NAME CHANGE:	20040315
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_162283810965543.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-06-03</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001283699</issuerCik>
        <issuerName>T-Mobile US, Inc.</issuerName>
        <issuerTradingSymbol>TMUS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001376436</rptOwnerCik>
            <rptOwnerName>Datar Srikant M.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O T-MOBILE US, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>12920 SE 38TH STREET</rptOwnerStreet2>
            <rptOwnerCity>BELLEVUE</rptOwnerCity>
            <rptOwnerState>WA</rptOwnerState>
            <rptOwnerZipCode>98006</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2021-06-03</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1687</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4083</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>13843</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Legacycap LLC</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>13724</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Safari LLC</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>8200</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Datar Investment LLC</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Represents restricted stock units granted under the Issuer's 2013 Omnibus Incentive Plan; such units vest in full on June 3, 2022 (the one-year anniversary of the grant), subject to the terms of the Issuer's Director Compensation Program.</footnote>
        <footnote id="F2">The reporting person and his spouse gifted all of the interests in Legacycap LLC to trusts for the benefit of their adult children. The reporting person and his spouse continue to serve as managers of Safari LLC.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Frederick Williams, Attorney-in-Fact</signatureName>
        <signatureDate>2021-06-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
