Unlocking old Sprint iPhone 4s I have an old Sprint iPhone 4s that hasn't been under contract for around a year now and I have a friend on T-Mobile whose contract doesn't end for another year. He still has a flip phone so I want to give him the old iPhone. Is there a way to unlock the iPhone if it is no longer under contract?
Unlocking is trivial with carrier support.

Here is Apple's article on how to proceed technically once your carrier has unlocked the device:


http://support.apple.com/kb/HT5014


We have a nice thread on this Sprint to T-Mobile shift here:


Getting an unlocked iPhone 4/4S to work on T-Mobile