<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2008-02-22</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001091973</issuerCik>
        <issuerName>SUNCOM WIRELESS HOLDINGS, INC.</issuerName>
        <issuerTradingSymbol>TPC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001243621</rptOwnerCik>
            <rptOwnerName>ANDERSON SCOTT I</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1100 CASSATT ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BERWYN</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>19312</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common</value>
            </securityTitle>
            <transactionDate>
                <value>2008-02-22</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>4850</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>27</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">For purpose of effecting a 1 for 10 reverse stock split, SunCom Merger Corp., a wholly owned subsidiary of SunCom Wireless Holdings, Inc. (the &quot;Issuer&quot;), was merged with and into the Issuer on May 15, 2007, with the Issuer as the surviving corporation in this merger.  In the merger, each issued and outstanding share of Class A common stock of the Issuer was converted into 0.1 share of Class A common stock of the Issuer.  This  transaction was exempt pursuant to Rule 16b-7.</footnote>
        <footnote id="F2">On February 22, 2008, pursuant to the terms of that certain Agreement and Plan of Merger, dated as of September 16, 2007 (the &quot;Merger Agreement&quot;), among T-Mobile USA, Inc. (&quot;T-Mobile USA&quot;), Tango Merger Sub, Inc. (&quot;Tango Merger Sub&quot;) and the Issuer, Tango Merger Sub was merged with and into the Issuer, with the Issuer surviving as a wholly owned subsidiary of T-Mobile USA. Under the Merger Agreement, each share of Class A common stock of the Issuer, other than shares owned by T-Mobile USA, Tango Merger Sub or the Issuer (as treasury stock or otherwise), was cancelled and converted
 into the right to receive $27.00 in cash, without interest and less any applicable withholding taxes.  In reliance upon and in accordance with that certain no-action letter issued to Skadden, Arps, Slate, Meagher &amp; Flom LLP (available January 12, 1999), this transaction was exempt under
 Rule 16b-3(e).</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Laura Porter, Attorney-In-Fact</signatureName>
        <signatureDate>2008-02-26</signatureDate>
    </ownerSignature>
</ownershipDocument>
