OnePlus 5, 5T start getting Android 8.1 Oreo-based OxygenOS 5.1

OnePlus, weeks ahead of its OnePlus 6 smartphone launch, has started rolling out new OS updates for the existing OnePlus 5 and the OnePlus 5T smartphones. The update comes in the form of OxygenOS 5.1 and is based on Android 8.1 Oreo. These include a bunch of system upgrades, optimisations and improvements in the launcher.