One of T-Mobile's big "uncarrier" moves was to offer international roaming data to most customers for free. However, Canada and Mexico were special cases where you'd get full-speed LTE data on most plans. There wasn't any special limit on that data, which was remarkably generous—too generous, it would seem. T-Mobile is rolling that feature back and limiting LTE to 5GB per month in those countries.
Starting on November 12th, T-Mobile is altering its "Mobile without Borders" program for all customers on One, Simple Choice, and other legacy plans with roaming.Read More
T-Mobile will limit LTE roaming in Canada and Mexico to 5GB starting November 12 was written by the awesome team at Android Police.