Users encountering this issue should refrain from attempting random unlock tokens, as repeated failures may trigger a temporary ban from unlock attempts by the OPPO security server.

In some diagnostic or engineering setups, the "Serial" referenced is not just the physical sticker serial, but the Electronic Serial Number (ESN) stored in the NV (Non-Volatile) partition. If the NV partition has been corrupted or wiped (common in devices with eMMC damage or bad flashing attempts), the bootloader cannot read the serial number to verify it against the token, returning a "not match" error by default.

Are you currently , or are you seeing this while trying to manually unlock your phone's bootloader? AI responses may include mistakes. Learn more

If you have been approved but still see the error, you might be using the wrong command syntax. While most Androids use fastboot flashing unlock , some older OPPO models or specific firmware versions require: fastboot oem unlock Use code with caution. Or, if you are using the official deep testing environment: fastboot flashing unlock Use code with caution.

) buttons until you feel a vibration to force a normal restart. Firmware Restoration: Use specialized tools like MTK Client