Use dir to ensure the flash has enough free space for the new image and the extraction process. 3. How to Fix "Recovery Image Verify Failed" on S7721U
Is your serial console output running stable without baud rate line noise?
mksquashfs recovery_root/ new_recovery.squashfs -comp lzo -b 131072 -noappend
This comprehensive technical guide explains why repack verification fails and how to successfully rebuild and flash a validated recovery image. Understanding the Roots of Verification Failure huawei s7721u recovery image verify failed repack
Or a Huawei-specific header:
If the device is stuck in a boot loop or the above method fails, use Huawei's emergency recovery mode.
Navigate to the "Enter serial submenu" to configure file transfer, or choose "Update software" from the main menu. 3. Clear Existing Flash/Backup Data Use dir to ensure the flash has enough
Before initiating complex recovery procedures, verify the basics:
Connect your phone and enter (Power + Volume Down while connected).
Once the extraction is complete, navigate to your extracted_images folder. Among the extracted files, you will find a file named RECOVERY.img . This is the original, unmodified recovery image that should match your device's bootloader. This file is the key to resolving the "verify failed" error. mksquashfs recovery_root/ new_recovery
: 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.
I can provide the exact BootROM commands to resolve this issue. Share public link