This is the official software used to flash MediaTek chips.
A new pop-up window will open. Click on .
For dual-SIM devices, switch to the second SIM tab and input the second valid identity string.
He worked methodically. First, he imaged the board, copying every sector and logging offsets. He traced the EFS partitions, the NV items that normally stored identity strings. The default tools returned errors—access denied, signature mismatch. So Rafi wrote his own small harness: a script that spoke slowly to the bootloader, mimicking the handset’s own initialization. He learned the board’s quirks—the way the PMIC responded after a cold boot, how a certain GPIO needed a gentle pull to let the debug UART wake. Mt6771 Imei Repair
Maui META (Modem Engineering Testing Architecture) is a more low-level professional tool used by engineers to directly interact with the baseband processor. It is more complex than the SN Writer Tool but can succeed where other methods fail.
How to fix an invalid IMEI issue on your smartphone - Airtel 15 Mar 2024 —
Power off the device. Connect it to the PC while holding a volume button (usually Volume Down or both) until the tool detects it in META mode. Load Database: Select the (Application Processor Database) and (Modem Database) files specific to your device's firmware. This is the official software used to flash MediaTek chips
A success dialogue box will confirm the change. Click Disconnect and restart the phone. Troubleshooting Common Errors "Baseband Unknown" Error
You cannot fix an Mt6771 IMEI without a computer. You will need a Windows PC and specific software tools.
Input the original IMEI numbers (usually found on the device box or under the battery) into the tool's interface. For dual-SIM devices, switch to the second SIM
: Install the latest MTK USB VCOM Drivers on your PC so your computer can communicate with the phone in "Meta Mode" or "Preloader Mode".
A common, devastating issue for these devices—often caused by custom ROM flashing, root procedures, failed firmware updates, or corrupted NVRAM—is the loss of the IMEI number, resulting in "Invalid IMEI" or null IMEI, which causes the phone to lose cellular network functionality.