If you can provide the (e.g., CPH2385...A.30) that is currently installed, I can give you a more specific guide. Also, are you trying to update the phone or unbrick it? OPPO A57S CPH2385 - GSM HOSTING FILES
For the , firmware updates can be handled through official system settings or by manually flashing stock ROM files if the device is experiencing software issues like boot loops or a "dead boot." Official Software Update (Recommended) Firmware OPPO A57s
ColorOS for the A57s is designed to manage background tasks to maintain efficiency, though heavy usage may require manually closing background apps to prevent sluggishness. Storage Management: If you can provide the (e
Even with the official charger, some phones charged at 10W. Charging IC firmware update in A.12 (March 2023) correctly negotiated VOOC protocol. Storage Management: Even with the official charger, some