I am confused. I want to pick up another unlocked iPhone directly from Apple, but there seems to be a lot of confusion on which model they offer. I'd like the new unlocked model just to future proof my phone, or incase I decide to jump to T-Mobile. I originally thought Apple will offer this model April 12th? So if I purchased an unlocked iPhone from them tonight it would be the old model which includes: HSPA+ 21 and LTE on AT&T 850/1900mhz, LTE 1700mhz/2100, 700mhz HSPA+ 21 1900mhz on T-Mobile and their LTE ???