In a small apartment in Mumbai, 19-year-old Arjun stared at his trusty OPPO F3. It was 2019, and while the world buzzed about the latest phones, his F3 had been stuck on Android Marshmallow for far too long. Then, one evening, a notification flickered: "Software Update: Android 7.1 Nougat."
If you can't wait for the OTA update or want to update manually, you can download the firmware file and use the Oppo flashing tool. oppo f3 nougat 711 official update download fix