This is the most dangerous step. Downloading an incorrect or malicious file can destroy your device or infect your PC. Follow these rules:
These phones are known to use the MT6731 chipset. If you own one, search for your specific model:
Important: Even two phones with MT6731 may have different partition tables. Only use firmware labeled for your exact model. mt6731 flash file
If your device shows "Invalid IMEI" or "Baseband Unknown," the NVRAM partition is damaged. Flashing the nvram.bin or nvdata partition from the original MT6731 flash file restores your network functionality.
There are several scenarios where downloading and flashing the official MT6731 firmware becomes necessary: This is the most dangerous step
A valid MT6731 flash file package must contain:
| Partition | Image File | Description |
|-----------|------------|-------------|
| Preloader | preloader_mt6731.bin | BootROM stage 1 – critical, device-specific |
| LK (Little Kernel) | lk.bin | Secondary bootloader (fastboot) |
| Boot | boot.img | Kernel + ramdisk |
| Recovery | recovery.img | Recovery environment |
| System | system.img | Android OS (usually AOSP/Go edition) |
| Vendor | vendor.img | Vendor customizations (if A/B or dynamic) |
| Data | userdata.img | Factory data partition |
| Cache | cache.img | Temporary cache (often omitted) |
| NVRAM | nvram.bin | IMEI, Wi-Fi/BT MAC, calibration data |
| Tee | tee.img | Trusted Execution Environment |
| Logo | logo.bin | Boot logo splash |
| Secro | secro.img | Secure data (network locks, etc.) |
| Metadata | – | Dynamic partition metadata (Android 9+) |
| Super | super.img | Logical system/vendor/product (Android 10+) | Important: Even two phones with MT6731 may have
Critical: NVRAM and secro are device-unique. Flashing generic versions may cause IMEI loss or network issues.