Many users confuse Android version with ColorOS version. ColorOS 5.0 (based on Android 8.1) rolled out to the Oppo F7 and Find X, but never to the F3 series. The last official firmware for the Oppo F3 remains:
Warning: This will wipe all data. Unlock your bootloader first (which may be complex on Oppo devices). Proceed at your own risk.
Requirements:
Steps:
Result: A clean, bloatware-free Android 8.1 Oreo experience with all core features: picture-in-picture, notification channels, autofill APIs, and better background app management.
Let’s address the elephant in the room immediately. Officially, the Oppo F3 does not have an Android 8.0 (Oreo) update.
When Oppo launched the F3, it shipped with Android 6.0 Marshmallow layered with Oppo’s own ColorOS 3.0. Later, Oppo rolled out an update to Android 7.1 Nougat (ColorOS 3.2). However, Oppo’s official update policy for mid-range devices from that era did not include a second major OS upgrade. Oppo F3 Update 8.0 Download
They are either running a custom ROM (like LineageOS) or have modified the build.prop file to change the Android version number displayed. It is not official.
If you absolutely need Android 8.0 (Oreo) features (Picture-in-Picture, Notification Channels, Auto-fill), you must unlock the bootloader and install a Custom ROM.
Prerequisites:
Recommended Custom ROM: LineageOS 15.1 (Android 8.1)
Step-by-Step Installation (Advanced Users Only):
Absolutely not. These files are often ransomware or corrupt. Always check checksums and community feedback on XDA before flashing anything. Many users confuse Android version with ColorOS version
Pros: Latest features, security patches, better performance.
Cons: Bugs (camera or VoLTE may fail), no official support, risk of bricking.