In some cases, this error is triggered by hardware faults, such as a faulty battery or a short circuit in the charging port/board, which can force the device into a recovery loop. Note on Repacking
The bootloader expects a specific RSA signature at the end of the image. Repacking tools often fail to replicate this without the private keys.
nand erase 0x200000 0x800000 # Adjust offset and size huawei s7721u recovery image verify failed repack
# Copy image to /tmp (via USB stick mounted as /mnt/usb) cp /mnt/usb/repacked_recovery.img /tmp/ # Flash using mtd utility mtd write /tmp/repacked_recovery.img recovery
) typically indicates that the bootloader has rejected the recovery image because its digital signature is missing, corrupted, or does not match the official Huawei firmware In some cases, this error is triggered by
tftp 0x80800000 repacked_recovery.img
Turn off the device and connect it to a power source or PC via USB. nand erase 0x200000 0x800000 # Adjust offset and
, stuck on the logo, or able to boot into the main operating system?
: Huawei firmware images use proprietary headers containing data segment lengths and checksum offsets. Standard Android kitchen tools often structure these headers incorrectly.