An update requires breathing room.
If you cannot find an update through the settings menu, you can manually flash official firmware using an SD card: YouTube·OPPO Carehttps://www.youtube.com OPPO Software Update : Step-by Step Guide update oppo f1s
⚠️ Warning: Only follow guides from XDA Developers for the . Using wrong files will brick the device. An update requires breathing room
Even if you stay on stock Android 6.0: