I am planning on getting selling my voyager or giving it to my brother and take over his t mobile account and purchasing a 16gb iphone. My question is... Which service is better with the iphone as far as downloading, internet, applications, etcs.. and which is cheaper. If i do unlock and use tmobile am i going to be losing any features.. PROs and CONs.. I also watched that SDK thing about the Iphone which is nice.