T-Mobile's "Canada and Mexico are considered domesic!" isn't really true.
Most American cellular companies now offer data and calling plans where Canada and Mexico enjoy a special roaming status not bestowed on other international destinations. If you read the ads, you're generally led to believe that usage in our two nearest neighbors is considered "domestic" – even at full LTE speeds. For most one- or two-week vacations, this is effectively true. I'd heard rumors online that people on longer visits had their service throttled or completely cut off by T-Mobile if the majority of their cellular usage in a single billing period is Canada/Mexico roaming. Well, I just got that dreaded text today, March 14th. For the record: My billing cycle resets on the 22nd of each month . I got to Mexico Jan 26th , and have been back in the states since March 4th. Now, at this point, I don't care if they throttle my Can/Mex roaming for the rest of this billing cycle because I'm back home, but I am curious what would have happened if I...