: If you have bypassed the root verification by modifying the BootROM with test environment keys, ensure your repacking engine signs the final image using the matching private key.

When your Huawei S7721u displays a "Recovery image verify failed" message, it typically indicates that the recovery partition on your device has been corrupted or is incompatible with the bootloader's security verification. This is a security feature of Huawei devices that checks the digital signature of system images before allowing them to boot. The error often appears after attempting to flash custom recoveries or when system updates go wrong.

: Do not use generic Android kitchen repacking tools. Use script sets explicitly tested for older Huawei chipsets.

or T1 series) frequently triggers security halts. The most common technical conflicts include:

Update failure on my HUAWEI phone/tablet | HUAWEI Support Global

Do you have the for your specific region, or should I help you find the correct UPDATE.APP for the S7-721u? How to Fix Huawei Recovery Image Verify Failed Error

If the device can still reach eRecovery mode, it can download official firmware directly over Wi-Fi. Connect to a charger. Volume Up + Power until the eRecovery screen appears. "Download latest version and recovery" and connect to a stable Wi-Fi network. Flash Original Recovery via Fastboot If you have access to the original recovery.img for your specific model: Boot into Fastboot mode. Run the command: fastboot flash recovery original-recovery.img Check Hardware

Depending on whether you want to completely revert to factory settings or successfully bypass the verification check with your repacked image, select one of the following technical pathways.

: This is the most critical component. You need the exact official firmware file that matches your specific tablet model (S7-721u) and your region. A mismatched firmware is a leading cause of this error. Download the full official UPDATE.APP package for your device from a trusted source like the Huawei mobile support page or reputable XDA forums.