OnePlus announced Software Maintenance Schedule for its phones back in June 2018. As per the schedule, the Android 9 Pie update will be the last major Android OS update for the OnePlus 3 and the OnePlus 3T handsets. OnePlus has finally announced the Android 9 Pie community beta builds for the phones, which can be downloaded here. Since this is not a stable update, it is not being made available via OTA and users who are interested in trying out the new Android 9 Pie build on their OnePlus 3/3T will have to download and flash it manually. 

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