Execute the "Write" command and restart the phone. You can verify the fix by dialing *#06# on the dial pad. ⚠️ Critical Note on Legality
If the NVRAM is completely wiped (e.g., after formatting flash), use this. Mt6771 Imei Repair
Critical drivers required for your Windows PC to properly communicate with the phone while it is powered off. Execute the "Write" command and restart the phone
(restoring your original number) is a legitimate service for fixing software bugs. However, IMEI Change Critical drivers required for your Windows PC to
: For minor software glitches where the "CDS Information" is still accessible. *#*#3646633#*#* to enter Engineering Mode. Navigate to Connectivity CDS Information Radio Information Use AT commands such as AT+EGMR=1,7,"YOUR_IMEI" to manually update the entry.
To interface with the MT6771's NVRAM (where IMEI data is stored), you generally need professional-grade GSM tools: Pandora Box/Software: Widely considered the most stable for MT6771. UnlockTool: