Verizon now offers 4G service in my area, AT&T doesn't and I have not been able to get any information on when they might move up to 4G. My iphone 4s reports 4G on the screen. I'm not sure about the technology on this; if I were to unlock my AT&T phone and move to Verizon would I then be able to get 4G? Or do I have to change phones?