Android 7.0 Nougat beta version is already available for OnePlus 3 and OnePlus 3T handsets, but the company's co-founder Carl Pei confirmed via Twitter that a stable Android 7.0 Nougat is ready and will start gradually rolling out tomorrow, over-the-air.
Another good news is that the recent network drop issue with OnePlus 2 devices is finally solved. The issue was caused by the OxygenOS 3.5.5 update that was released a few days ago. OnePlus has now started pushing out the fix in the form of OxygenOS 3.5.6 update, so check your notifications.
2) Android N stable OTA for the OP3 and the OP3T. Gradual rollout will begin later tonight.— Carl Pei (@getpeid) December 31, 2016