My unlocked Sony ericsson W850i that I use on Tmobile's service in the states, let's me do lots of things at once like: listen to music while I play a game: text while I make a call: or go on the internet while I'm on a call (I looked for directions once while talking to the person I was going to pick up!) to name a few! It's a pretty smart phone for a non-"smart phone"....