To bypass this signature block, you must flash the repacked RECOVERY.img file directly via Fastboot interface commands instead of running it through the standard UPDATE.APP wrapper:
binwalk original_recovery.img
If you are intentionally repacking the recovery (e.g., to add root or custom features), you must bypass the signature check:
Swap to a high-quality SanDisk or Samsung SD card under 32GB formatted cleanly to FAT32. Fastboot hangs on < waiting for device > terminal response. huawei s7721u recovery image verify failed repack
Recovery image verify failed System halted
: Huawei Versatile Routing Platform (VRP) images are digitally signed by Huawei’s private keys. A repacked image alters the payload, invalidating the original RSA/ECC digital signature embedded in the file header.
This will create a new, repacked recovery image with the modified verification components. To bypass this signature block, you must flash
If your tablet is bootlooping or locked on the Huawei logo, triggering the forced update mode will bypass the standard Android user interface and force the hardware to look at the SD card. Power off your Go to product viewer dialog for this item. tablet completely. Insert the MicroSD card containing the dload folder.
If you still see verify failed , the signature or hash check is – you will need a hardware programmer to disable it.
FirmwareEditor - pack -o repacked_recovery.img A repacked image alters the payload, invalidating the
| Offset | Size | Field | |--------|------|-------| | 0x00 | 4 | Magic ( HUWI ) | | 0x04 | 4 | Image length | | 0x08 | 256 | RSA signature | | 0x108 | ... | Kernel + rootfs |
Phase 1: Reverting to Stock via Fastboot (Emergency Recovery)
Alternatively, from a working S7721U:
: Run the repack script. This tool automatically retains the precise original base offsets, pagesizes, and command lines. ./repackimg.sh Use code with caution. Phase 3: Bypassing the Secure Boot Verification Check
Download the official stock firmware package ( UPDATE.APP ) for the . Open Huawei Update Extractor on your system.