Besides upgrading to Android 7.1.1 Nougat, the Gallery app has received considerable improvements with this update. Now it has photo editor with watermark and photo straightening options. Also, folders and individual media files can hide. Below are the main changelog of OxygenOS Open Beta 12 and OxygenOS Open Beta 3.

Main changelog of OOS Open Beta 12 (OnePlus 3) and Open Beta 3 (OnePlus 3T): Below are the known issues of OxygenOS Open Beta 12 and 3. – New Shot on OnePlus wallpaper option – Gallery Improvements: New photo editor with watermark and photo straightening options Newly added media will be highlighted in Photos section Image location will be displayed on grid view Media can be grouped by month and year Folders and individual media can be hidden – General bug fixes If you are already participating in the Open Beta program, you will receive the update over the air automatically. Alternatively, you can download the ROM and install manually. – Compatibility issues with certain third party apps

How to Flash OxygenOS Open Beta 12/3 on OnePlus 3/3T

Note: This guide requires ABD and fastboot set up on your PC. Also, both device requires unlocked bootloader. Backup data before proceeding.

  1. Download OxygenOS Open Beta 12 for OnePlus 3 from here and Open Beta 3 for OnePlus 3T from here. Save the file inside the ADB installation folder.
  2. Switch off OnePlus 3/3T, press Power + Volume Down buttons together to boot into stock recovery.
  3. In recovery, choose “Install from USB” option, tap OK to confirm. A screen with “You are in sideload mode” will be displayed.
  4. Connect your OnePlus 3/3T to PC/Mac and issue the following command in command prompt /terminal For Windows: adb sideload File Name.zip For Mac/Linux: ./adb sideload File Name.zip [File Name.zip=OxygenOS Open Beta file name]
  5. Wait a while, your phone should now update to the selected build and reboot automatically to take you into OxygenOS (Android 7.1.1 Nougat). (Source – OnePlus)