Press and hold the buttons simultaneously until the update screen appears. Advanced Repair
To recap the critical success factors:
When your SCL-U31 turns into a digital brick, the most reliable solution is reinstalling the stock firmware using an SD Card (also known as the "dload" method). Unlike using complex PC tools (like SP Flash Tool or QPST), the SD Card method is safer, faster, and requires no drivers. Huawei Scl-u31 Firmware Sd Card
Confirm the update and wait for the device to reboot automatically once finished. Press and hold the buttons simultaneously until the
on your device; back up important files beforehand if possible. Step-by-Step Guide 1. Prepare the SD Card Connect your MicroSD card to a computer. the SD Card method is safer