If the OTA (Over-the-Air) update is not showing, you can look for firmware files on official support pages. OPPO Software Update : Step-by Step Guide
Download and install the MediaTek USB VCOM drivers on your computer. oppo f3 android 7 update download
If your F3 is stuck on bootloop or won’t start, you can use the recovery method. This is a last resort for manual installation. If the OTA (Over-the-Air) update is not showing,
A: It is highly unlikely. Since the update is years old, OPPO no longer pushes it as an OTA update. The phone will typically show "Your system is up to date" even if it's on an older version. oppo f3 android 7 update download