Release the buttons once the Huawei logo or an update progress bar appears.
The first boot after a firmware update can take up to 10 minutes. If it takes longer, try performing a "Wipe Cache Partition" from the recovery menu (Hold Volume Up + Power). How to FLASH HUAWEI phone Using SD card [Full Tutorial] Huawei Scl-u31 Firmware Sd Card
In the menu that appears, navigate to > Software Upgrade > SDCard Upgrade . Confirm by tapping OK to begin the installation. Troubleshooting Common Issues Release the buttons once the Huawei logo or
If your phone cannot reach the home screen, use this hardware-button method: Power off your Huawei SCL-U31 completely. Insert the prepared SD card. How to FLASH HUAWEI phone Using SD card
Press and hold the buttons simultaneously for 5–8 seconds.
Extract the downloaded firmware zip file on your computer. You should see a file named inside a folder. Insert your SD card into your PC.