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. Instead of having unrestricted LTE data in Mexico and Canada, you only get a maximum of 5GB. For those with old capped plans of 5GB or less, there's no change to the limit. For anyone on a One or classic unlimited plan, it's much more restrictive. After you hit the 5GB cap (or less for some legacy plans), you will continue to get unlimited data; it'll just be very, very slow data. Most p...