I'm on an iPhone 5 and AT&T's LTE speeds in Manhattan have utterly collapsed -- where I live and work at least. I used to get an average of 30mps down and around 15mps up. Now it's between 5 & 6 mps down and 2mps up. That's full speed--I'm not throttled. It's still very usable of course, but these speeds are less than what Id expect from a carrier that prices itself as premium.