You can find community-maintained versions of or AOSP-based ROMs on forums like XDA Developers . Note that these are "Stock Android" experiences and will not feature the ColorOS interface you may be used to. Risks and Warnings
The device will automatically check the Oppo Update Servers for any available OTA (Over-The-Air) packages. If an update is found, tap . Running Android 8.0 via Custom ROMs oppo f3 android 8 update download
You will need to flash a tool like TWRP (Team Win Recovery Project). You can find community-maintained versions of or AOSP-based
Since this requires wiping your data, use the Oppo Clone Phone or a PC backup tool first. Where to Find Downloads oppo f3 android 8 update download