OnePlus announced that it will start substituting its HydrogenOS for the Chinese market with Oppo's in-house ColorOS, starting with version 12, which is also based on Android 12. Naturally, the OnePlus 9 and 9 Pro will be the first ones to get it whereas the rest will receive it at a later point.
And the distribution of the OS for the OnePlus 9 and 9 Pro in China has started a bit early according to some users. The OTA update weighs around 4.61GB and was expected to hit the handsets sometime in early October along with the Find X3 and X3 Pro.
As of now, there's no official confirmation that OnePlus will swap the international OxygenOS for Oppo's ColorOS, only the Chinese making the switch.
Source (in Chinese)
I think u were talking about the colour OS tat was 2 years before!! Try the new one 😂😸😂
I think colour OS 12 will be the best Android skin ever in market.. it's very much customizable and less buggy compare to One UI and hydrogen OS.. Don't just say anything without using it.. try it before you say something bad..