OnePlus smartphones sold outside of China are equipped with OxygenOS, but smartphones sold in China are equipped with HydrogenOS; however, with the announcement of the Oppos ColorOS OnePlus 9 series in March, the situation has changed. These are OnePlus 8, 8 Pro and 8T.
This revelation comes from OnePlus COO Liu Fengshuo. He visited Weibo to announce that the OnePlus 8 Trio will receive ColorOS updates in the first quarter of 2022. Will come too. However, OnePlus previously stated that its international variants will continue to be used in conjunction with OxygenOS. Whether this will change with future OnePlus smartphones remains to be seen.