I have several questions that don't seem to be answered anywhere. I have two lines on my AT&T account. One is AT&T Next, one is not. The one that isn't is only eligible for "early upgrade" (base price plus $250). - Apple will not sell the iPhone 6S at "early upgrade" price. Only Next or Full Price. Questions: 1) In the long run, for my "early upgrade eligible" phone, should I order my 6S through AT&T and do the early upgrade? Or pay full price through Apple? 2) If I pay full price through Apple, will it come unlocked? Is there a benefit to buying the T-Mobile version over the AT&T version (given that I will use it with AT&T's network)? Thank you... They have made this process so confusing it's ridiculous.