Oxygen and Hydrogen the two variants of the same OnePlus skin. One for China only and the other for the rest of the world. Android 11 debuted in February. Ever since Android 11 debuted companies started constructing their own variants of the new Android. Hydrogen OS 11 and Oxygen OS 11 are pretty much the same, the one difference that stands in Google Services. Oxygen OS features Google Play services while Hydrogen OS ditch Google Play services. The update will bring all the incredible features from the Android 11 plus additional enhancement by OnePlus. The additional enhancements include: