OnePlus brand has released a new OxygenOS beta update for Oneplus 3 and 3T users. This software update will be available as Open Beta 21 (OnePlus 3) and Open Beta 12 (OnePlus 3T). One interesting fact with this update is it adds Parallel app support for both handsets. This means now you can use the dual version of same app like Whatsapp, Facebook, Twitter etc.

The firmware bundle also includes the version update of some apps, optimizations and bug fixes. Below you can see the changes and tweaks in detail.

Launcher Update: After this update the OnePlus launcher version will be bumped to v2.1.5. The new version includes redesigned folder UI, swipe left or right to switch folders, added 4 preview look thumbs for the homescreen folder icon and adds double finger slide option.

Gallery Update: The new version of gallery app (1.8) brings light theme support and can open RAW image formats.

File Manager Update: It will update the file manger app version to 1.7.1. Now you can edit the search items by long pressing the items.

Optimizations & Bug Fixes: The more battery power consumed by bluetooth device will be fixed by this update. Coming to optimization part, it will merge the call histories of same person into one.

These are the list of modifications that has been updated by OnePlus on their forums. It will arrive as OTA update for existing open beta members. Want to participate in beta program then download ROM from official page and flash it on your device.