The only official source is the OPPO Community firmware portal at https://community.oppo.com/cn/rom. You must create an account and log in to access downloads.
oppo.com/in/rom/">Official OPPO India Support page to download the latest stable version.
Flash the custom ROM following developer instructions precisely oppo f3 android 8 update download
Check official support
This is a generalized guide for advanced users. If you are uncomfortable with command-line tools, do not proceed. The only official source is the OPPO Community
The quest for the is a journey from official disappointment to community-powered innovation. While OPPO abandoned the device on outdated software, the developer community has stepped in to offer a second life to this capable selfie phone.
OPPO does not provide public firmware downloads directly on its main website. Official firmware is only available through the OPPO Community platform after account authentication. While OPPO abandoned the device on outdated software,
What is your current and Android security patch date ? (Found in Settings > About Phone).
There are no plans for an official Android 8.0 Oreo or newer update for the Oppo F3. How to Check for Official Software
Background limitations on apps significantly improve standby time.