Hello everyone, especially the Sigma team
i have an y9 prime 2019 (stk-l21m)
the phone build was b351 befor dead
then i try to downgrade for frp bypass
phone get the firmware compltly
but after finish phone is dead an pc dont reconize any usb port
i deassmble the phone and short the test point for huawei com 1.0
then use load fastboot option on sigma
The phone went into fastboot mode
and when sigma tray to unlock bootloader for writing firmware in fastboot mode its just say faild
when u add this build for unlock bootloader
or give me another way to revive my customer phone
