Nobody knows anything about the "iPhone 5" -- what it will have, when it will appear.
Except for one thing: I absolutely guarantee it will support LTE. Other than that, all bets are off.
Everything you have read from anywhere is just guessing, most of it less educated than they'd care to admit.
To put this another way: I have a fairly strong belief that I know who is going to win the next US presidential election. But it's a BELIEF, not a FACT, and it won't be a fact until the day after the election. It's important, I think, not to mix up strongly-held beliefs with facts.