MT6771 devices utilize a specific architecture that requires specialized service tools to communicate with the device's NVRAM (where IMEI data is stored). Popular options include: The official MediaTek

(Non-Volatile RAM), where the IMEI and calibration data are stored. Meta Mode (Recommended)

Leo didn't answer immediately. MT6771 repair wasn't like changing a screen; it was digital heart surgery. He connected the device to his workstation, the cooling fans whirring to life. The Digital Descent

on your PC to ensure the computer can communicate with the phone in "BROM" or "META" mode. Ensure the device has at least 30%–50% battery to prevent it from turning off during the process. Hardware ID:

Download the latest SN Writer tool and extract it on your PC. Open Tool: Launch SNWriter.exe as an administrator. Configuration: Select USB VCOM as the COM Port type. Target type: Select Smartphone . Check the IMEI checkbox. Check Dual IMEI if your phone supports two SIM cards. Load Database Files: Click Load DB and navigate to your stock firmware folder. Select the MD1_DB file. Select the AP_DB file.

Maui META is the official MediaTek tool for modifying IMEI numbers without root access. It works on almost all MT6771 devices.

Use a high-quality cable to connect the phone to the PC. Step-by-Step Guide to Restoring the IMEI Step 1: Install the Drivers Download the MediaTek USB VCOM drivers on your PC. Turn off signature enforcement on Windows if needed. Install the drivers and restart your computer. Step 2: Set Up Maui Meta

Connect the device to your PC while holding the Volume Down or both Volume buttons to trigger the correct diagnostic mode.

Incorrect preloader drivers or a device stuck in a boot loop.