Instead of a patched stock Nougat, consider a custom ROM based on Android 9, 10, or 11. These are often more stable and actively maintained for the OPPO F3.

Step 3 — Prepare PC & Drivers

Officially, OPPO did not release a broad over-the-air (OTA) update for Android 7.1.1 for the F3 model. While some regions may have seen specific builds, most users remained on Marshmallow (Android 6.0) throughout the device's lifecycle.

Despite risks, users attempt this for:

: Ensure all personal files are backed up, as manual flashing can lead to data loss if not done correctly. Download Firmware