I've noticed that the Sprint model is actually the one with the most LTE supports, and I'm wondering if it's possible to pay full price for a Sprint iPhone at the store and not have it activate on site? Has anyone done this before, for previous iPhone launches? And would the device be unlocked if I paid in full and not have it activated into a contract? I'm looking to use this phone for T-Mobile as well as during my travel to greater China. During the iPhone 5 launch, all the paid in full phones that weren't activated in store were in fact unlocked; that's how I got an unlocked AT&T model but I'm really unfamiliar with Sprint. Thanks for all your help.