If your phone is running the stock, unmodified software, you cannot download an official Android 8 update from Oppo. Checking your system updater will always show "Your system is up to date."
If you're an Oppo F3 user, we recommend that you upgrade to Android 8. However, make sure to back up your data before installing the update, and follow the installation instructions carefully to avoid any issues. oppo f3 android 8 update download
Select "Install from storage device" and choose the downloaded file. 2. Unofficial Android 8 Update (Advanced Users) If your phone is running the stock, unmodified
Download sources and authenticity
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