MStar unpack/repack tools (Python/bash scripts, e.g., mstar_repack ) Purpose: Extract, modify, and rebuild MStar upgrade_loader.pkg or update.img firmware images. Skill Level Required: Intermediate to Advanced (Command line, Linux familiarity)
Modifying firmware violates the TOS and warranty.
: Mount or unpack system.img or recovery.img to add apps or change settings.
Newer MStar Android 7.0+ builds often use LZ4 compression for the ramdisk rather than GZIP. Older repacking tools attempting to decompress an LZ4 ramdisk with GZIP will fail. Modern tools must detect the compression format automatically.