T-Mobile’s iPhone discounts are for customers only, but it will still sell you the deviceSorry, you can't buy a $580 iPhone 5 from T-Mobile and then sign up with another carrier -- you have to give T-Mo at least once month of service.
http://feedproxy.google.com/~r/TheAppleBlog/~3/WaKzqfShqa8/story01.htm