To be specific, T-Mobile customers won't get throttled the moment they tip over 50GB downloaded a month; that will only happen if they're in an area where a lot of other folks are sucking down data. Customers who've exceeded that threshold will get "de-prioritized" and download slower than others who haven't reached it. Their status is reset every month.

That's higher than the 22GB throttle threshold for Verizon's Beyond unlimited plan, which that carrier has tried to assuage by restricting resolution to slow down user data consumption. But it's safe to say that arbitrarily throttling is pretty unpopular, which Verizon can do at any time to subscribers of its Go unlimited plan. At least T-Mobile's trying to give users some breathing room with the higher threshold.