This happens most frequently when flashing a modified or "repacked" firmware zip, utilizing an incorrect build version, or when the recovery partition has been corrupted. Below is a comprehensive, step-by-step guide to diagnosing and fixing this error on your Go to product viewer dialog for this item. Understanding the Error
: This package includes the necessary adb and fastboot commands to communicate with your device. You can download the official platform-tools from Google's developer website. Once downloaded, extract the ZIP file to a simple folder on your PC (e.g., C:\platform-tools ).
Interrupt the boot process (press Ctrl+C or f during countdown). At the HI_SILICON_V000# prompt: huawei s7721u recovery image verify failed repack
# Step 1: Extract the first 262144 bytes (header + boot code) dd if=original_recovery.img of=header.bin bs=1 count=262144
If all local zip/dload methods fail and you cannot get the device to boot, you can use Huawei's official companion tool to restore the device to its factory state. This happens most frequently when flashing a modified
dd if=original_recovery.img of=recovery.squashfs bs=1 skip=262144
fastboot devices fastboot flash recovery RECOVERY.img fastboot reboot Use code with caution. You can download the official platform-tools from Google's
The error message occurs on Huawei devices when a modified, corrupted, or improperly signed recovery partition fails the secure boot cryptographic signature check. For legacy HiSilicon/MediaTek based Huawei tablets and phones (such as variations related to the S7/MediaPad lines), resolving this error during an image modification or "repack" process requires bypassing or correcting the hardware-enforced verification mechanisms.
Open a command terminal on your PC and flash the original binary using the following command: fastboot flash recovery RECOVERY.img Use code with caution.
Use tools like 华为FirmwareEditor to repack the modified firmware image:
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.