As a former Sprint customer, I'll disagree about that particular carrier. Sprint has offered "unlimited" data for a long time, but after they finally got the iPhone a few years ago, they saw a surge in data usage and started implementing undisclosed and seemingly random soft caps on all their unlimited data customers, all while claiming they offered "truly unlimited data" that wasn't throttled. They have only very recently admitted[1] to throttling some of their customers, but it's actually been going on for a long time according to customer complaints in their support site.
As for T-Mobile, it's my understanding that they changed their policy to include the possibility of throttling and initially didn't disclose it until it was leaked[2].
Of course, neither of these situations are as customer-hostile as AT&T has been, so maybe the FTC won't go after them. But I wouldn't be surprised if Sprint and T-Mobile make changes to their policies if AT&T loses.
As for T-Mobile, it's my understanding that they changed their policy to include the possibility of throttling and initially didn't disclose it until it was leaked[2].
Of course, neither of these situations are as customer-hostile as AT&T has been, so maybe the FTC won't go after them. But I wouldn't be surprised if Sprint and T-Mobile make changes to their policies if AT&T loses.
[1] http://bgr.com/2014/05/08/sprint-throttling-unlimited-data-d...
[2]http://bgr.com/2014/08/13/t-mobile-unlimited-data-throttling...