Modifying your device’s firmware carries risks including permanent bricking. The author and platform are not responsible for any damage to your Oppo F1s. Proceed at your own risk.
Before attempting to flash a custom Android 7.1.2 firmware, ensure you have the following:
: Some users use flash files to downgrade or upgrade between different ColorOS builds. Installation & Technical Requirements Installing or "flashing" firmware on an is a technical process that requires specific tools:
The Oppo F1s will not receive Android 8.0 or higher officially. Android 7.1.2 (ColorOS 7.1) is the latest and most stable final firmware. Use it to restore performance, fix boot issues, or remove custom ROMs before selling the device.
Yes, immediately. The Oppo F1s is out of warranty by now (released 2016), so this is irrelevant for most users.