So of course I upgrade to the 5S first thing Friday morning, and transfrerred over my unlimited data AT&T plan (never giving it up until they take it away... which is coming soon I'm afraid). At any rate, I'm already at 7GB or so 50% of the way through my month, and was being throttled on the 5. After changing to the new 5S however, I am no longer being throttled. I have confirmed through the app that I am still on unlimited, and have paperwork from the upgrade indicating so, so this doesn't seem to be an issue of the switcheroo they tried last year either... Anyone else not throttled after the change? I wonder if it's tied to the SIM or the IMEI? Definitely enjoying it regardless!