Download OxygenOS open beta 21/12 for Oneplus 3/3T

Latest OxygenOS open beta 21 for OnePlus 3 and OxygenOS open beta 12 for OnePlus 3T is released. The update brings a variety of new features and improvements that you can easily see in the official change log below. OnePlus Open beta updates keep rolling out with multiple improvements and bug fixes, but this new update brings some interesting new features and one of them is parallel app, this features allows you run same apps with different profiles or instances. You can download the firmware from the link below and install it manually on your device by following the instructions.

It is also reported that Android O for OnePlus 3 and OnePlus 3T will be released later but till then get these open beta updates on your device. If you are running previous beta update then you can easily update your device via OTA and if not, then go ahead and follow the manual process to download install OxygenOS open beta 21 for OnePlus 3 and OxygenOS open beta 12 for OnePlus 3T.

Change log: Source OnePlus

New addition:

Parallel apps – Introducing the all new parallel apps feature that lets you run a parallel version of the same app using a separate account, now supports Facebook, Twitter, Whatsapp, Instagram and many other 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

Merged call history from the same number

Download and install OxygenOS beta 21 on OnePlus 3 and beta 12 on Oneplus 3T

Before you begin:

Your device should be charged minimum 60% to avoid shut down during the process.

Latest USB drivers for OnePlus should be installed on PC. Here

Set up adb and fastboot drivers. Follow this quick guide


Download OxygenOS beta 21 for OnePlus 3

Download OxygenOS beta 12 for OnePlus 3T

Process to install OxygenOS beta 21 on OnePlus 3 and beta 12 on Oneplus 3T

Download the OxygenOS open beta 21/12 for Oneplus 3/3T and transfer the downloaded zip file in a specific folder.

Now open the same folder press Shift+Right Click on any empty area in the folder then choose ‘Open command window here’.

Issue the following command to reboot your device into recovery mode

adb reboot recovery

Once in recovery mode, select ‘Install from USB’ and then type the following command (from the same folder where you placed the firmware file) to start the adb sideload process.

adb sideload

The installation process will start and wait for it to complete. Once the process is completed simply type

fastboot reboot

That’s it! You have the latest OxygenOS beta update on your device.

Source OnePlus [1 | 2]