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.
Oppo (and Realme) devices use a strict verification process for bootloader unlocking. The "Serial Not Match" error typically triggers for three reasons:
The error essentially means there is a security mismatch between the unlock token (or command) you are sending and what the device’s hardware expects. Why Does This Error Occur? the serial is not match fastboot unlock verify fail oppo
If you are using a Chinese ROM, the global Deep Testing APK will almost always return a "Serial Not Match" error. You must use the Chinese version of the app linked to an OPPO ID registered in that region. Important Reminder
The Oppo servers haven’t fully "whitelisted" your IMEI/Serial Number despite the app saying "Application Approved." Many users see "Review Successful" in the app
Instead of the standard fastboot flashing unlock , try: fastboot flashing unlock_critical (Note: This is usually for newer models and requires specific permissions.) 5. Check for Regional Restrictions
If you have tried all the above and the error persists, it is likely that Oppo has patched the exploit for your specific firmware version. In this case, you may need to wait for a newer version of the Deep Testing tool or a community-made exploit. The "Serial Not Match" error typically triggers for
Select or WinUSB and pick the "Android Bootloader Interface" version. 4. Use the Correct Unlock Command
Your PC is communicating with the phone using generic drivers that misinterpret the serial string in Fastboot mode. Step-by-Step Solutions 1. Verify the "Deep Testing" App Version
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
Type at least 2 characters to search…