Tips & Tutorials May 25, 2018 Download OxygenOS 5.0.3 May 2018 Android 8.1 Oreo for OnePlus 3 / 3T OnePlus is updating OnePlus 3 and 3T smartphones to new OxygenOS 5.0.3 firmware based on Android 8.1 Oreo, carrying May 2018 security patch. The…