OnePlus has started the incremental rollout of a new OxygenOS 12 - C.15 build for the OnePlus 8T model. This OTA will be incremental and will reach only a small percentage of users, but very soon, they will be going for a broader rollout of the update.
The new update optimizes the phone's charging speed in some scenarios. The update also fixed some previously known issues to make the system stable and smoother. This update is currently being rolled out only for Indian users, but soon they will be rolling out the update for other regions too.
OnePlus 8T was released on 16th October 2020 with Android 10 out-of-the-box, and upgradable to Android 12, OxygenOS 12 (as of 2022)
On March 19th 2022: the much-awaited android 12 with OxygenOS 12 was released for Oneplus 8T in India & North America, you can read more details here

Source: Oneplus Community Page
| Android OS | Update | Release date/status | Estimated time |
| Android 11 | Out-of-the-box | October 2020 | Nil |
| Android 12 | First update | March 2022 | 6 month |
| Android 13 | Second update | Eligible | Unconfirmed |
| Android 14 | Third update | Eligible | Unconfirmed |
The OnePlus 8T will receive three years of major OS updates and four years of Security updates.
Check your device>>> OnePlus Android 12 update list
The OnePlus 8T Software Update with OxygenOS 12 with C.15 Build is currently rolling out in India.
Once the update is available on your device, you can head over to Settings >> About Phone >> Software Update section to update your OnePlus device with the latest update.
For more OnePlus Android updates, please download our android app – available on the Play Store