Before Oppo A71K Userlock Remove, Make Sure The Following Steps Are Performed:
Install QcomMtk_Driver_Setup Lasted
LINK โ DOWNLOAD
How To Connect Qualcomm 9008 EDL Mode?
1.Qualcomm Old Model > Power Off / Vol+ Vol- USB Connect
2.The Oppo A71K is a Qualcomm unit.Therefore, it is necessary to cover the back and support 9008 Test Point.

Device : Oppo A71 (CPH1801)
Operation : Format FS
Checking for existing devicesโฆNot Found
Turn Off phone, hold Vol UP + Vol DOWN and insert USB cable.
Some phones may need Special Boot Cable or TestPoint for EDL mode.
Found Port : Qualcomm HS-USB QDLoader 9008 (COM43)
Driver Info : Qualcomm Incorporated, qcusbser.sys, 2.1.2.7
Connecting to phoneโฆOK
Waiting for responseโฆOK
Init Handshake SequenceโฆOK
Hardware ID : E1A00900 [8953] 00000000
OPK_DATA : 557BAC65705B8A8303276B9FBB8FD533DBB33EA9E55BF80B47647B8549C170B9
Initializing ProtocolโฆOK
Using Auto Loader Selection [1]
Preparing LoaderโฆDone
Sending Loader [8953_015]โฆDone
Executing LoaderโฆOK
Formatting UserdataโฆDone
Disconnect phone and hold Power Button to reset.
Operation Finished.
QcFire Ver. 7.3
Download UMT Qcfire Lasted Version
LINK – DOWNLOAD
Oppo A71_CPH1801EX_11_A.05_180214_firehose_8953_QFIL
LINK – DOWNLOAD
