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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2018-01-10</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001650575</issuerCik>
        <issuerName>Borqs Technologies, Inc.</issuerName>
        <issuerTradingSymbol>BRQS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000050863</rptOwnerCik>
            <rptOwnerName>INTEL CORP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2200 MISSION COLLEGE BLVD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SANTA CLARA</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>95054</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>ORDINARY SHARES</value>
                <footnoteId id="F1"/>
                <footnoteId id="F2"/>
            </securityTitle>
            <transactionDate>
                <value>2018-01-10</value>
                <footnoteId id="F3"/>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>226587</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4192756</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Through wholly-owned subsidiary</value>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">On August 18, 2017, pursuant to that certain Merger Agreement, dated December 27, 2016 and amended on May 10, 2017 and June 29, 2017 (as amended, the &quot;Merger Agreement&quot;), between Borqs Technologies, Inc. (the &quot;Issuer&quot;) and, among other parties, Zhengqi International Holding Limited (&quot;Sponsor&quot;), Issuer's wholly-owned subsidiary, PAAC Merger Subsidiary Limited, merged with and into Borqs International Holding Corp (&quot;Borqs International&quot;), with Borqs International surviving such merger as the surviving entity and wholly-owned subsidiary of the Issuer.  Pursuant to the Merger Agreement and an escrow agreement entered into in connection with the closing of the merger, the Issuer issued certain Ordinary Shares to an escrow agent to be held in an indemnity escrow account, including 1,278,776 Ordinary Shares to be held for the benefit of Sponsor.</footnote>
        <footnote id="F2">(Continued from Footnote 1)Pursuant to a Repurchase Agreement, dated January 10, 2018, between the Issuer and Sponsor, the parties agreed, among other things, that (i) 1,277,625 Ordinary Shares held in escrow for the benefit of Sponsor, would be distributed to the Issuer's remaining shareholders pro rata, with Intel Capital Corporation, a wholly owned subsidiary of Intel Corporation (&quot;Intel Capital&quot;), receiving 217,524 Ordinary Shares in such distribution and (ii) 51,151 Ordinary Shares held in escrow for the benefit of Sponsor would remain in escrow for the benefit of the Issuer's remaining shareholders, pro rata, with Intel Capital being entitled to receive 9,063 of such Ordinary Shares.</footnote>
        <footnote id="F3">This report is being filed within two business days of Intel Coporation being made aware of the transaction contemplated herein by the Issuer.</footnote>
        <footnote id="F4">The securities reported in Table I of this report are owned indirectly by Intel Corporation through Intel Capital.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Susie Giordano, Corporate Vice President</signatureName>
        <signatureDate>2018-01-16</signatureDate>
    </ownerSignature>
</ownershipDocument>
