Tonight I purchased an ATT iPhone 5 for $649. I believe it was purchased as Device Only though I did not see the sales person pick the device only on the handheld unit. My receipt shows No Wireless Service Activation during iPhone sale. The problem I am having is that when I connect the iPhone to Itunes I do not ever get the Congratulations your iPhone has been unlocked screen. Leaving the ATT sim in the phone it just constantly shows No Service, which I do not have. However I bought this phone so I could use it on Tmobile. When I put in my nano Tmobile sim and restart the phone it just shows activation required on the phone and in itunes it says I need to put in a valid sim card. When I put the ATT sim card back in, there is no activation happening. So I have no clue what the problem is or how to unlock this full priced ATT iPhone to use with Tmobile. Did the apple sales guy screw up something when he sold me the phone? Any help would be appreciated.