T-Mobile “unlimited” plan = 5GB limitation. How is that unlimited again?

Earlier this month, T-Mobile reduced its “unlimited” data cap to 5GB, but took the unusual (and welcome!) step of merely throttling users that go over this limit, rather than charging them fines. It seems that change was in preparation for a whole slew of bigger ones at America’s number four carrier — tiered data is in. Phones will now be put into one of three categories with the following data plans: