The ColorOS 13 Closed Beta update for the OnePlus 9R and OnePlus 9RT has already begun rolling out by OnePlus in China. A few days ago, the manufacturer began offering the OxygenOS 13 Closed Beta programme for these two smartphones in the Indian market.
Since ColorOS 13 and OxygenOS 13 share the same code base, they are nearly indistinguishable. It’s obvious that with Android 13, OnePlus has upped their software game to a whole new level. The company has previously committed to providing major Android updates for its flagship phones for a full three years.
The ColorOS 13 Closed Beta will be available for registration to Chinese users of the OnePlus 9R and OnePlus 9RT. To join the Android 13 Closed Beta, go to the beta application link and fill it out with your information. After the application has been submitted, OnePlus will perform a verification. Assuming your acceptance was successful, the software update will be delivered wirelessly. Navigate to Settings > About device > Up to date or Available Updates to manually check for updates.
For More details you can check out the Oneplus Forum (Chinese) For OnePlus 9R and OnePlus 9RT.