OnePlus 3 and 3T See Android Nougat Update
Keeping with their self imposed end-of-2016 deadline, OnePlus has released the Android Nougat based OxygenOS 4.0 update for the OnePlus 3 and OnePlus 3T. The update was released very late on December 31st, hitting the deadline and the update is now making its way out to all owners of the 3 and 3T. While it still may take a few days for your phone to see it, it is out and it is only a matter of time.
The update is all focused on Android Nougat. The release notes in the OnePlus forums essentially highlight all of the features of Nougat and speak very little of any other changes that the company has made in their custom version of Android.