Huawei Scl-u31 Firmware Sd Card Official
Cause: The UPDATE.APP is corrupted, or it is for the wrong model (e.g., SCL-L01).
Fix: Delete the file, redownload from a different mirror, and try again.
A: Rare with official firmware, but if it happens, you need to root and restore the modem partition via a backup. Write-protected IMEI is usually safe. Huawei Scl-u31 Firmware Sd Card
Once the phone boots to the setup screen: Cause: The UPDATE