I have had the iP4 (ATT), 4S and 5 (Verizon) and sadly for one reason or another sold each one, the iP5 would have been great with the bigger screen higher res display, but the lack of voice (3G) and data (4G) at the same time like Android phones can do was a deal breaker and so it went.
I am hoping this time its better or else I will have to consider a move to ATT to get the benefits, but their service simply sucks in my market.