It's no secret that OnePlus is cutting its ties with Cyanogen over the fiasco with Micromax in India. It has been developing its own custom ROM to replace CyanogenMod in its future devices. And while it isn't yet revealing what that ROM will look like or will offer, it is now announcing its chosen name. Its ROM will be called "Oxygen OS", at least in the rest of the world. But in China, it will be called Hydrogen instead.