: Attempting to modify or "clean" the firmware is difficult; standard ADB and fastboot commands often fail or return "unknown command" errors, making it hard for users to hard reset or clear system partitions.
Stick to the trusted sources listed earlier. U696cl Firmware
Flashing firmware will erase all data. Back up your photos, contacts, and documents. Battery Life: Ensure the device is charged to at least 50%. USB Cable: Use a high-quality OEM data cable. Install the MTK (MediaTek) USB Drivers : Attempting to modify or "clean" the firmware