Upgraded from a 4 today to a 6 also, huge upgrade. Swapped from att to sprint as well, 50 dollars a month for unlimited was just too good to pass up, their service is ALMOST as good as att, and the store gave me 150 dollars of acessories of credit for the trade in on my 4 year old 4. So I feel like I got a pretty good deal. 3G service only at my house but it seems at least as fast as att 3G, which is all I had before, but I'll use wifi anyways, but their lte was amazingly fast when I was in town, but then again I have nothing to compare that to since I never used their lte either, although I know their coverage is as spotty as sprints.