T-Mobile USA is getting ready to launch ts uncarrier phase 3 plan of allowing its users to use their mobile data plans in 100 countries without incurring any additional charges (that is what all the leaks and rumors say). Canada is on the list of countries.
The new feature will allow all Simple Choice customers to use unlimited 2G data and texting in any of the supported countries. Voice calls (in country) will be capped at $0.20 per minute. This is not an add on package, it will be included for free in all customer plans.
In addition to the above , T-Mobile has upgraded its network to 4G LTE ahead of schedule.