If you're visting from the US: T-Mobile ONE gives you unlimited* 4G LTE data in Canada and Mexico, and throttles you to 128kbps in ~140 other countries (enough

If you're visting from the US: T-Mobile ONE gives you unlimited* 4G LTE data in Canada and Mexico, and throttles you to 128kbps in ~140 other countries (enough to get basic maps). Their previous plan, Simple Choice, would throttle you to 2G speeds when you were in Canada, but it was still enough to use Maps. If you're a long-term visitor, then, yes, you should just get a local prepaid SIM from Rogers. Disclaimer: I'm a T-mobile customer.