OnePlus 3/3T: OxygenOS Open Beta 21/12 Rolls Out With New Features and Optimizations


OnePlus 3/3T owners who are signed up for OxygenOS Open Beta program starts getting the new OxygenOS Open Beta 21/12 update with new features and a handful of optimizations. The update includes Parallel Apps function, new launcher and several optimizations. The OOS Open Beta 21/12 OTA update starts rolling out and all OnePlus 3/3T beta participants will get the update shortly.

One of the main features of OxygenOS Open Beta 21/12 is Parallel apps function. This function allows OnePlus 3/3T users to run a same app with different accounts, for example WhatsApp, Facebook, Twitter, Instagram, etc.


The Launcher is also updated to version V2.1.5 with features like double finger slide, redesigned UI for folders, and optimized home screen folder icon. The update also includes updated Gallery app and File Manager.

Official Changelog of OxygenOS Open Beta 21/12

New addition:

Parallel apps: All new parallel apps feature that lets you run a parallel version of the same app using a separate account. Right now this supports Facebook, Twitter, Whatsapp, and Instagram (and a few more popular apps)


Updated to Launcher V2.1.5: Optimized home screen folder icon, with a preview look of first 4 icons in the folder.

Redesigned UI for folders, allowing switch between folders by swiping left or right

Added double finger slide support, you can now slide the home screen with one finger while using another to hold an item

Updated to Gallery V1.8: Supports light theme, supports opening RAW format images.

Updated File Manager to V1.7.1: Long pressing search items now shows edit operations

Optimizations: Call histories from the same person will now be merged

Bug Fixes: Fixed increased battery consumption after connecting to a Bluetooth device

Installation Instruction:

If you are participating in the OxygenOS Open Beta program, you will receive the new update via OTA. If you are not joined for the OxygenOS Open Beta program, but want to try the latest update on your OnePlus 3/3T, you can download the ROM and install manually via ADB.

To install the new update, download OxygenOS Open Beta 21 for OnePlus 3 from here and OxygenOS Open Beta 12 for OnePlus 3T from here.

After downloading the full firmware, follow this installation instruction. (Source – OnePlus)