<SEC-DOCUMENT>0001283699-21-000099.txt : 20210511
<SEC-HEADER>0001283699-21-000099.hdr.sgml : 20210511
<ACCEPTANCE-DATETIME>20210511180846
ACCESSION NUMBER:		0001283699-21-000099
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210510
FILED AS OF DATE:		20210511
DATE AS OF CHANGE:		20210511

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WESTBROOK KELVIN R
		CENTRAL INDEX KEY:			0001190588

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33409
		FILM NUMBER:		21912784

	MAIL ADDRESS:	
		STREET 1:		MILLENNIUM DIGITAL MEDIA SYSTEMS L.L.C.
		STREET 2:		16305 SWINGLEY RIDGE ROAD, SUITE 100
		CITY:			ST. LOUIS
		STATE:			MO
		ZIP:			63017

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_162077090676814.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-05-10</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001190588</rptOwnerCik>
            <rptOwnerName>WESTBROOK KELVIN R</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>2021-05-10</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>7500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>136.15</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>22588</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">The price reported in Column 4 is a weighted average exercise price. These shares were sold in multiple transactions at prices ranging from $136.146 to $136.165. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission upon request, full information regarding the number of shares sold at each separate price within the range set forth on this footnote.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Frederick Williams, Attorney-in-Fact</signatureName>
        <signatureDate>2021-05-11</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
