"who calls the software on their phone the Droid Razr's OS or the Galaxy SII's OS?" I do. "operating system" is a very ambiguous term. Depending on who you ask

"who calls the software on their phone the Droid Razr's OS or the Galaxy SII's OS?" I do. "operating system" is a very ambiguous term. Depending on who you ask, Linux, GNU, Gnome and Ubuntu are all called an "operating systems". Android is not a operating system in the sense the term is used for Windows 7 or iOS. The comparable OS to those systems is what Samsung, HTC, Google etc. ship with their devices. Different operating systems based on a common platform.