Complex sentence: On the 31st of December 2016 OnePlus released OxygenOS 4.0.0 to the public via OTA download, it is based on Android Nougat and includes its features including several other modifications.
Split into simpler sentences: On the 31st of December, 2016, OnePlus released OxygenOS 4.0.0 to the public via OTA download. It is based on Android Nougat and includes its features and several other modifications.