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(Non-Volatile RAM), where the IMEI and calibration data are stored. Meta Mode (Recommended)
Navigate to > CDS Information > Radio Information . Select Phone 1 (for the first SIM). At the top (AT+), type: AT +EGMR=1,7,"YOUR_ORIGINAL_IMEI" . Mt6771 Imei Repair
These methods should only be used by authorized technicians to restore a device's IMEI (found on the box or SIM tray).
This happens when the device storage chip (eMMC/UFS) is write-protected by a locked bootloader. Ensure you are using a reliable Auth Bypass tool that targets the MT6771 boot ROM exploit. This public link is valid for 7 days
Method 2: Using Professional Service Tools (Technician Level)
If SN Writer fails, a professional tool like ChimeraTool provides a more robust, automated approach. Can’t copy the link right now
Connect it to the PC while holding to enter boot mode. Once detected, go to the Repair tab and select Repair IMEI . Enter your original IMEI and click Start Procedure . Using Infinity CM2 MTK Open the CM2MTK module. Select the MT6771 CPU/Platform in the settings. Navigate to the Security tab.
With Android 13+ introducing verification and Google’s hardware-backed keymaster, MediaTek is gradually locking down NVRAM writes. Newer chips (Dimensity series) use efuse mechanisms to prevent rollback. However:
The MT6771 chipset (Helio P60/P70) utilizes a specific secure boot architecture. Understanding where the IMEI is stored is critical for a successful repair:
The phone did not correctly enter Meta Mode. Ensure drivers are installed, and try a different USB port/cable.