With the device off, hold Volume Up + Volume Down + Power .
If you are attempting to flash a Huawei S7721U device and encountering the dreaded error, you are likely dealing with signature mismatch issues or corrupted partition headers. This error typically occurs when the bootloader rejects the recovery image because it does not match the expected cryptographic signature or the file structure is invalid. huawei s7721u recovery image verify failed repack
Insert the card into the powered-off device. Press and hold Volume Up + Volume Down + Power simultaneously until the update process begins. 2. System Restoration via HiSuite With the device off, hold Volume Up + Volume Down + Power
typically occurs when the device's bootloader detects an unauthorized or corrupted image, often after a failed update or an attempt to flash a modified (repacked) recovery image Understanding the Error Insert the card into the powered-off device
The (often a distribution switch or ONT/CPE device) may encounter a “Recovery Image Verify Failed” error during firmware updates or recovery mode operations. This report explains the root cause, the security mechanism behind the failure, and the repack procedure required to bypass or correct the verification error.
The bootloader on the S7-721u is designed to verify the integrity of the recovery partition before allowing it to boot.