Mt6768 - Nvram File
On MT6768, NVRAM data is typically split across two logical partitions:
A dumped NVRAM.bin (size usually 512KB or 5MB depending on firmware) follows this internal structure:
| Offset Range | Content | |--------------|---------| | 0x000000 – 0x0001FF | NVRAM header (magic, version, checksum) | | 0x000200 – 0x00xxxx | LID (Logical ID) table – metadata for each data item | | Variable | Actual data records (IMEI, MAC, RF calib) | | End of file | Checksum / footer | mt6768 nvram file
Each data record is identified by a LID (e.g., LID 0xA5 for IMEI, LID 0x04 for Wi-Fi MAC).
dd if=/sdcard/nvram_fixed.bin of=/dev/block/by-name/nvram On MT6768, NVRAM data is typically split across
Below are three proven methods, from easiest to most advanced.
mt6768_nvram_backup.bin.Warning: Never download random NVRAM files from untrusted sources. Using another device’s NVRAM will copy that device’s IMEI, which is illegal in most countries (IMEI cloning). It will also cause RF calibration mismatches, leading to poor signal or battery drain. A dumped NVRAM
However, if you need a "generic" or "blank" MT6768 NVRAM file for repair purposes (to later write your own IMEI using Maui META or SN Writer), consider these sources:
Before downloading, verify that the file header matches MT6768. Open the file in a hex editor (like HxD). You should see strings like NVRAM, MT6768, or board IDs.
The MT6768, also known as the Helio G85 or Helio G90/G95 series, is a mid-range 64-bit ARM Cortex processor widely used in budget and mid-range smartphones. While the chipset is robust, the software partition structure on devices using this SoC is sensitive to corruption during flashing or rooting.