Extract the downloaded firmware zip file. Locate the file named .
| Item | Requirement | |------|-------------| | | 4GB to 32GB (format FAT32) | | Card reader | To copy files from a PC (or use phone via USB if it boots) | | Battery level | At least 50% to avoid interruption | | Backup | All user data will be erased (photos, contacts, apps) | | Firmware file | SCL-U31 specific “UPDATE.APP” | huawei y6 scl-u31 firmware sd card