Download Stable OxygenOS 12 C.15 for OnePlus 8, 8 Pro, 8T, and OnePlus 9R with March 2022 Security Patch

Last month, OnePlus released a stable OxygenOS 12 firmware upgrade for the OnePlus 8, 8 Pro, 8T, and the OnePlus 9R based on Android 12. However, many OnePlus users reported that the firmware is full of bugs; as seen in our OnePlus 8 downgrade tutorial. Today, the firm released yet another stable Oxygen OS 12-based C.15 OTA update featuring critical bug fixes and stability improvements.

The OnePlus 8, OnePlus 8 Pro, OnePlus 8T, and OnePlus 9R have all received the new C.15 OTA update featuring Android 12. It’s a hotfix software update that resolves some critical issues and improves the overall user experience.

As for the changes, the current version increases charging speed, enhances calling quality, and addresses a Face Unlock glitch. The OTA also brings the Android security patch level to March 2022. Check out the complete changelog from below.

On top of this, you will get custom Oxygen OS 12 and Android 12 goodies like the new wallpaper-based theme engine (Material You), Privacy dashboard, and updated OnePlus apps.

Furthermore, you get Oxygen OS 12 native features like a custom version of Material You design, Dark Mode with 3 adjustable levels, improved Shelf, Canvas AOD, and much more.

So download and install OxygenOS 12 C.15 update below.

OxygenOS 12 C.15 Features and Changelog

• System
  • [Optimized] the charging speed in some scenarios
  • [Optimized] the communication stability when making a phone call
  • [Fixed] the occasional issue that unable to use face unlock
  • [Fixed] the issue of abnormal display when enabling applications in some scenarios
  • [Improved] system stability
• Camera
  • [Fixed] the abnormal notification issue of “Camera is running”

Original Oxygen OS 12 update changelog

• System
  • Optimized desktop icons with improved textures, by using a design inspired by brand-new materials and uniting lights and layers
  • Fixed the issue that background applications are abnormally closed in specific scenarios
  • Fixed the issue with lens permissions when using third party camera applications
  • Fixed the issue of screen cannot respond when receiving notifications
• Dark mode
  • Dark mode now supports three adjustable levels, bringing a more personalized and comfortable user experience
• Shelf
  • New additional style options for Cards, making data contents more visual and easier to read
  • Newly added Earphone Control Card with Bluetooth earphone one-click adjustment
  • Newly added access to OnePlus Scout in Shelf, allowing you to search multiple contents on your phone, including Apps, Settings, Media Data, etc
  • Newly added OnePlus Watch Card in Shelf, to easily glance at your health stats
• Work Life Balance
  • Work Life Balance feature is now available to all users, allowing you to effortlessly switch between Work and Life mode via quick settings
  • WLB 2.0 now supports automatic Work/Life mode switching, based on specific locations, Wi-Fi network, and time, also bringing customized App notification profiles according to the personalization
• Gallery
  • Gallery now allows you to switch between different layouts with a two-finger pinch gesture, intelligently recognizing the best-quality pictures, and cropping the thumbnail based on the content, making the gallery layout more pleasing
• Canvas AOD
  • Canvas AOD brings you new diverse styles of lines and colors, for a more personalized lock screen experience with inspiring visuals
  • Newly added multiple brushes and strokes and support for color adjustment
  • Optimized software algorithm and improved face recognition to better identify the features and skin color of different figures
• Network
  • Fixed the issue that unable to automatically connect to Wi-Fi
• Bluetooth
  • Fixed the issue that wireless earphones cannot play sound when connecting Bluetooth in specific scenarios

Known issues

1. The clock displays smaller. You can try to adjust it manually or delete it and add the clock widget again
2. Phone application may be replaced by Contacts in Dock. You can adjust it manually to move Phone application in the right place

Download OxygenOS 12 C.15 for OnePlus 8 Series and OnePlus 9R with Android 12

Here you can download and install stable Android 12 based OxygenOS 12 C.15 firmware update for OnePlus 8, 8Pro, and 8T series smartphones. The incremental OTA zips are available for the Indian and North American variants. Stay tuned for the full stock firmware zips and EU variants.

The OTA weighs only 263 MB in size. However, the following are full packages weighing ~3 GB in size. Install via local upgrade method.

The following packages are intended for the model numbers as listed below:

• Packages with build tag IN11DA are intended for the following variant:
  IN2021: India
• Packages with build tag IN11AA are intended for the following variant:
  IN2025: Global
• Packages with build tag IN11BA are intended for the following variant:
  IN2023: EU

Note: As of writing this article, only the OTA update zips are available. For full stock firmware, stay tuned!

Download Oxygen OS 12 C.15 for OnePlus 8

• India
  • Incremental OTA from C.11 to C.15

Previous stable OxygenOS 12

• OnePlus 8
  1. India (IN2011_11.C.11):
     • Full update
     • Incremental from Open Beta 1 (C.10)
  2. Global (IN2015_11.C.11):
     • Full update
     • Incremental from Open Beta 1 (C.10)

Download Oxygen OS 12 C.15 for OnePlus 8 Pro

• India
  • Incremental OTA from C.11 to C.15

Previous stable OxygenOS 12

• OnePlus 8 Pro
  1. India (IN2021_11.C.11):
     • Full update
     • Incremental from Open Beta 1 (C.10)
  2. Global (IN2025_11.C.11):
     • Full update
     • Incremental from Open Beta 1 (C.10)

Download Oxygen OS 12 for C.15 OnePlus 8T

• India
  • Incremental OTA from C.11 to C.15

Previous stable OxygenOS 12

• OnePlus 8T
  1. India (KB2001_11.C.11):
     • Full update
     • Incremental from Open Beta 1 (C.10)
  2. Global (KB2005_11.C.11):
     • Full update
     • Incremental from Open Beta 1 (C.10)

Bonus Download Oxygen OS 12 for OnePlus 9R

• India
  • Incremental OTA from C.11 to C.15

Previous stable OxygenOS 12

• OnePlus 9R
  • India (LE2101_11.C.14):
    • Full update
    • Incremental from Open Beta 1 (C.13)

How to install Oxygen OS 12 full stock firmware onto OnePlus 8 series?

Most of the above-listed updates are incremental OTA updates. Meaning, you need to be on the previous Oxygen OS 11 firmware and install the OTA zip via stock recovery or via adb commands.

Visit this tutorial here for incremental OTA: How to install OTA updates on any Android device?

Alternatively, for full updates, do the following:

MP version – Stable official version
DP version – Developer Preview version
OBT Version – Open Beta version

MP and OBT to DP upgrade guide—via Local OTA Update
Note: This upgrade method will erase all the contents of the phone, please be sure to backup first.

1. Download the latest ROM upgrade zip package from the specified server.
2. Copy the ROM upgrade package to the phone storage.
3. Go to Settings -> System -> System Updates -> Click top right icon -> Local upgrade -> Click on the corresponding installation package -> Upgrade -> System upgrade completed to 100%.
4. After the upgrade is complete, click Restart.
5. Update successful.

Downgrade to Android 11 via rollback package on OnePlus 8 series

Tutorial: How to Downgrade OnePlus 8, 8Pro, 8T to Stable Android 11 (Without Losing Data) from Android 12

• OnePlus 8
  1. India:
     • Rollback package
  2. Global:
     • Rollback package
• OnePlus 8 Pro
  1. India:
     • Rollback package
  2. Global:
     • Rollback package
• OnePlus 8T
  1. India:
     • Rollback package
  2. Global:
     • Rollback package
• OnePlus 9R
  1. India:
     • Rollback package

How to downgrade?

For users who have already upgraded to this OxygenOS 12 stable firmware, can rollback can download the full firmware from the downgrade section and install via this apk. With it, you can choose to rollback. It will open automatically after being installed, then you just need to click the button on the top right corner, to select the upgrade file as mentioned in step 3 of the instructions above.

1. Download the suitable rollback package from the links below.
2. Copy the Rollback package to the phone storage.
3. Install this apk. You’ll need it to roll back. Then, open the “MyApplication2” app -> tap LOCAL UPGRADE, then enter the Recent page -> tap the top-left menu icon -> chose your phone model -> find the downgrade package and tap -> then will jump to another page and have an Installation options alert, tap INSTALL NOW -> wait to finish the installation -> tap reboot​​
4. After the upgrade is complete, click Restart.
5. Rollback successful.

Source