OxygenOS 12 Finally, OxygenOS 12 (Android 12) beta is available for OnePlus 7 and 7T 2 years ago What you must know The Nord CE and 9RT, along with the OnePlus 7, 7 Pro, 7T, and 7T Pro,… The OxygenOS 12 upgrade for the OP 9 and 9 Pro has been pulled by OnePlus 2 years ago It's never easy to provide a large platform upgrade for your flagship phones, and it's even more difficult when you're…