OPPO generally does not allow official bootloader unlocking on modern devices. When the system detects a manual attempt to enter Fastboot or bypass security checks, it triggers this "verify fail" message. Firmware Mismatch:
If the error appeared spontaneously, it might be due to a shorted Volume Minus key . Disconnecting or replacing a faulty volume button has resolved the infinite "serial mismatch" loop for some technicians. OPPO generally does not allow official bootloader unlocking
Some users report this error specifically on newer Android versions (like Android 13), while downgrading to an older version (like OxygenOS 11) sometimes resolves the verification mismatch. Recommended Solutions OPPO generally does not allow official bootloader unlocking
: Stuck on "the serial is not match fastboot unlock verify fail" – Any fix? OPPO generally does not allow official bootloader unlocking