Let me be very clear. Unlimited in my world, presumably yours as well, means just that: unlimited. However, in the wireless industry, especially for our esteemed GSM carriers, AT&T and T-Mobile (they deserve each other by the way - not in a merger but when you wish them ill) has a very different definition of unlimited. However, if users are throttled from 4G down to 3G, will you be pissed?
I read this GiGaom post on the possibility that AT&T might sunset EDGE. So, if that happens, does it mean that users who get the nasty text from AT&T are forced to go at a slower 3G speed when EDGE goes away?
T-Mobile is doing something similar as it attempts to move from its current 3G (not buying the 4G nonsense) to LTE by 2014 - there were reports in late 2011 that some users were getting 3G speed on the T-Mobile network when they ought to be getting EDGE only.
Time will tell just how this plays out. I'm more interested in how the unlimited data plan users will be impacted by this.