"My phone keeps restarting after the Nougat update." Fix: You flashed the wrong build. Download the Fastboot version of the firmware. Wipe system, cache, and internal storage using TWRP (Format data, not just wipe).
However, because official support officially stopped shortly after the Nougat lifecycle, users quickly turned to third-party development to get closer to a stock Android experience. The Role of XDA Developers Forums oppo f3 plus nougat update forum xda updated