Based on repair forum data, these MT6771 devices are the most frequent candidates for IMEI repair:
If the NVRAM is completely wiped (e.g., after formatting flash), use this.
Warning: This will overwrite your entire phone. Back up data first.
Step 1: Load the official stock firmware’s scatter file into SP Flash Tool.
Step 2: In the Partition List, ensure nvram and secro are checked.
Step 3: Select Format All + Download (last resort only).
Step 4: Click Download, then connect powered-off phone via USB.
Step 5: Once complete, repeat Method 2 (Maui Meta) to write IMEI numbers – because format all erases the original IMEI even from secro. Mt6771 Imei Repair
An ounce of prevention is worth a pound of patch. Follow these rules:
If you frequently flash custom ROMs, create a flashable ZIP that preserves NVRAM.
Step 1: Install Drivers
Step 2: Download and Extract
Step 3: Connect the Device
Step 4: Load NVRAM
Step 5: Write New IMEI
Step 6: Reboot
Success Rate: 85% | Difficulty: Medium