With these details, I can provide custom firmware links or targeted troubleshooting steps. Share public link
(the app you use to make calls).
Method 2: Repairing IMEI via Maui Meta Tool (No Root Required) mt6580 imei repair code
If the engineering menu method fails or returns continuous errors, the NVRAM partition on your device might be corrupted. You will need to use a PC tool to rewrite the data parameters. 1. Maui Meta Tool (Official MediaTek Tool) With these details, I can provide custom firmware
A pop-up window will appear. Click and upload the DB file from your stock firmware folder. With these details
If the engineering code fails, use ADB (Android Debug Bridge) with root. This works on 90% of MT6580 devices.