There are no plans for an official Android 8.0 Oreo or newer update for the Oppo F3. How to Check for Official Software
The officially launched with Android 6.0 Marshmallow and while there were some beta releases for Android 7.0 Nougat, there is no official Android 8.0 Oreo update for this device. oppo f3 android 8 update download
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 There are no plans for an official Android 8
Required to install any non-official software. If an update is found, tap
Oppo typically provides security patches and stability improvements for its older F-series devices, but major Android version jumps are rare for older hardware like the MediaTek MT6750T chipset found in the F3.
Some regions saw a limited beta for Android 7.1.1 Nougat (ColorOS 3.1), but it was never widely rolled out as a final stable build for all global variants.
Since this requires wiping your data, use the Oppo Clone Phone or a PC backup tool first. Where to Find Downloads