Here Is Complete Guide :
*Connect Phone in Normal Mode..
*Click On Transfer Documents.
*Now Dial *#800#.
*A Pop-Up Menu Will Be Appear.
*Click On ATCI.
*Click On Enable ATCI Once..
*Go Back To Tab Others And Click On USB ACM..
*Now Click On Close Port then Click On Open GSO Port..
Now Open Ufi Box Android Tools:
*Select Brand Oppo..
*Select Platform Mediatek ..
*Go To Service Tab..
*Click On AT Mode..
*Select Com Port(Mediatek USB Vcom)..
*Insert Imei Number..
*Click On Write...
*Job Done..
*Enjoy...
Proof:
BEST REGARDS:-
Akbar Ali
Abu Hassan Gsm *Always like my posts to appreciate my work.
*Connect Phone in Normal Mode..
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*Click On Transfer Documents.
*Now Dial *#800#.
*A Pop-Up Menu Will Be Appear.

*Click On ATCI.
*Click On Enable ATCI Once..
*Go Back To Tab Others And Click On USB ACM..
*Now Click On Close Port then Click On Open GSO Port..
Now Open Ufi Box Android Tools:
*Select Brand Oppo..
*Select Platform Mediatek ..
*Go To Service Tab..
*Click On AT Mode..
*Select Com Port(Mediatek USB Vcom)..
*Insert Imei Number..
*Click On Write...
*Job Done..
*Enjoy...
Proof:
BEST REGARDS:-
Akbar Ali
Abu Hassan Gsm *Always like my posts to appreciate my work.