After flashing a full firmware package, NVRAM is overwritten. You can hex-edit a backup of the NVRAM partition using the addresses from the scatter file to manually restore IMEI.
- partition_index: SYS14
partition_name: NVRAM
file_name: NVRAM.bin
is_download: true
type: NORMAL_ROM
linear_start_addr: 0x3800000
partition_size: 0x500000
region: EMMC_USER
Warning: Incorrect addresses will brick the device permanently. MT6577 Android scatter emmc.txt
The scatter file dictates the low-level boot order specific to the MT6577 architecture. You will typically see a hierarchy of partitions essential for the SoC to initialize: After flashing a full firmware package, NVRAM is overwritten
DSP / NVRAM:
MBR (Master Boot Record) / EBR (Extended Boot Record): Warning : Incorrect addresses will brick the device
The inclusion of "emmc" in the filename distinguishes this from NAND or SD card variations. The MT6577 was a transitional chipset that supported both NAND Flash and eMMC.