If you are trying to unlock the bootloader on your Oppo device and hit the dreaded error, you aren't alone. This specific error is a common roadblock for users attempting to root their phones or install custom ROMs.
Many users see "Review Successful" in the app and immediately jump into Fastboot. However, it can take time for the device's internal flag to sync with the server’s approval. the serial is not match fastboot unlock verify fail oppo
If your PC sees the device as a "Marshall London Bootloader" or a generic "Android Device," the serial verification will fail. If you are trying to unlock the bootloader
You are using a Deep Testing/Unlock Tool APK that wasn't designed for your specific model or region. However, it can take time for the device's
Oppo (and Realme) devices use a strict verification process for bootloader unlocking. The "Serial Not Match" error typically triggers for three reasons:
Select or WinUSB and pick the "Android Bootloader Interface" version. 4. Use the Correct Unlock Command
After getting approval in the app, wait at least 1–2 hours before rebooting into Fastboot mode. Keep the phone connected to Wi-Fi during this time. 3. Check Your Fastboot Drivers