To take care a problem with my wired headset. I like a mono one and apple or att doesnt make and sprint has one that will work on the iphone.it broke and Im in the warranty so I go back So while Im waiting for my turn. I played with the evo, it had no 4g and the 3 g had only 2 to 3 bars in the sprint store. The whole thing seemed very slow compared to my iphone 3 gs.