Back in December 2021, the unlocked OnePlus 9 and OnePlus 9 Pro received the official Android 12 update with OxygenOS 12. After a gap of three months, the latest operating system is rolling out to the T-Mobile variants of the OnePlus 9 series in the US.
The Android 12 x OxygenOS 12 update for the OnePlus 9 is bundled with the firmware version LE2117_11.C.16, while the Pro variant is upgrading with build number LE2127_11.C.16.
Talking about changes, needless to say, the package will carry all the user-friendly and safety features of Android 12. Further, it will be tossed with the OxygenOS 12 goodies. On the top, the build enhances the security by integrating the February 2022 security patch. In addition, it also resolves some general bugs and brings improvements as per the changelog.
However, T-Mobile hasn’t updated its Android update tracker page yet. Although it seems to be a wider rollout as per the user’s feedback. The software will automatically reach out to your device in case it hasn’t already. Alternatively, you can navigate to Settings > System Updates to manually track the update status.