The new Oxygen OS 3.0 update comes with a large number of changes. Apart from the fact that it is based on the latest Marshmallow update, Oxygen OS 3.0 comes with a much improved Shelf UX, a better camera experience and other feature improvements in the wallpaper picker. It also comes with the regular bug fixes and performance improvements.
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What’s New In Oxygen OS 3.0
Here is the detailed change-log of Oxygen OS 3.0:
Android 6.0.1 Marshmallow upgradeNew OnePlus Camera UIUI has been cleaned up: swiping up/down now switches between photo/video, whereas HD/HDR and flash settings live in the top right cornerYou can now change the aspect ratio and toggle grid view without going all the way to the settingsNew wallpaper pickerEasily preview and set both home screen and lock screen wallpaper in one place.Shelf UX has been improvedNo more edit mode, long press boards to rearrange or removeGeneral system performance improvementsBenchmarked 47% faster than OxygenOS 2.2.1 on key test scenariosFingerprint performance improvementTested 45% faster than OxygenOS 2.2.1 on averageSettings changesOld app permissions are gone, say hi to new (native Android) app permissions.Alert Slider has its own entry point with more customization optionsImproved settings menu readability by changing the order a bitMarch security patches
If you are going to flash this update on your OnePlus 2, be sure to backup all your data. You can dirty flash this update on your OnePlus 2 if you are currently on Oxygen OS 2.2.0 or higher.
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Download Oxygen OS 3.0 Beta
You can download the latest Oxygen OS 3.0 Beta update from here. Make sure you check out the detailed flashing instructions on the OnePlus forums. Source