OnePlus declared that it will begin subbing its HydrogenOS for the Chinese market with Oppo's in-house ColorOS, beginning with variant 12, which is additionally founded on Android 12. Normally, the OnePlus 9 and 9 Pro will be the initial ones to get it while the rest will get it at a later point.
What's more, the dissemination of the OS for the OnePlus 9 and 9 Pro in China has begun a bit right on time as per a few clients. The OTA update weighs around 4.61GB and was relied upon to hit the handsets at some point toward the beginning of October alongside the Find X3 and X3 Pro.
Any remaining OnePlus gadgets delivered after the OnePlus 7 and 7 Pro (those two included), should see their OS adaptations knock up to ColorOS 12 at some point in the main portion of 2022.
At this point, there's no authority affirmation that OnePlus will trade the worldwide OxygenOS for Oppo's ColorOS, just the Chinese doing the switch.