After nearly a month of beta testing, OnePlus has announced that it has begun rolling out the first official over-the-air update of OxygenOS 5.0 based on Android Oreo for the OnePlus 5.
Oxygenos 5.0 RSS
OnePlus only released the Android 8.0 (Oreo) based update less than two weeks ago for the 3 and 3T; however, since then users have had multiple issues with it, prompting it getting pulled.
OnePlus has started rolling out the Android 8.0 Oreo update with OxygenOS 5.0 for the OnePlus 3 and 3T. The update should reach all devices in the coming days as the process is completed in phases.