How to Fix "The Serial is Not Match fastboot_unlock_verify Failed" Error on Realme and Oppo Devices

Will These Expert Methods Solve Your Frustrating fastboot_unlock_verify Failed Error? Is Your Realme/Oppo Stuck on 'Serial Not Match' Error? Try These Powerful Fixes

The "The serial is not match fastboot_unlock_verify failed" error is a common bootloader unlocking issue that primarily affects Realme and Oppo devices. This error prevents users from accessing fastboot mode or proceeding with bootloader unlocking, effectively blocking custom ROM installation and device modification attempts.

Understanding the Error

This error occurs when there's a mismatch between the device's serial number and the fastboot verification process. The issue typically manifests during bootloader unlocking attempts and can render fastboot mode completely inaccessible on affected devices.

Solution 1: Force Fastboot Mode via ADB Command

Many users have successfully bypassed this error by using ADB commands to force entry into fastboot mode:

1. Download and extract Android SDK Platform Tools on your computer
2. Enable USB Debugging in Developer Options on your device
3. Connect your device to the PC using a high-quality USB cable
4. Open Command Prompt in the platform-tools directory
5. Enter the following command:

   adb shell reboot bootloader

6. Your device should bypass the serial verification and boot directly into fastboot mode

Solution 2: Firmware Flashing via MTK Client

For persistent cases, flashing the firmware using MTK Client software can resolve underlying serial verification conflicts:

1. Obtain the latest version of MTK Client compatible with your device
2. Ensure you have the correct firmware files for your specific model
3. Use MTK Client to flash the official firmware
4. This process resets the bootloader verification system
5. Follow the software's instructions carefully to avoid device damage

Additional Troubleshooting Steps

• Verify USB Connection: Use original USB cables and different USB ports to eliminate connection issues
• Check Driver Installation: Ensure proper ADB and fastboot drivers are installed on your PC
• Enable OEM Unlocking: Confirm that OEM Unlocking is enabled in Developer Options before attempting bootloader modifications
• Use Official Tools: Always use manufacturer-approved tools and firmware to prevent further complications

Important Considerations

• Bootloader unlocking voids device warranty
• Always backup important data before attempting these procedures
• Incorrect firmware flashing can permanently damage your device
• Some newer Realme and Oppo devices have additional security measures that may prevent these methods from working