Originally Posted by soitgoes

Things changed in the past few months.
https://support.t-mobile.com/docs/DOC-23332

Originally Posted by canadiancow

They changed it in late July. You have to actually switch plans (same price, but you get the better Canada/Mexico service). I didn't realize that was required until I landed in YUL and got a text about high speed data passes and $0.20/minute calls.

I called 611, and 10 minutes later, I had full speed data.

With the North America plan, you are never throttled in Canada. That doesn't mean you're always going to get amazing speeds, since it depends on the network and your signal strength. But that's the same as how a Rogers subscriber could have poor speeds because Rogers has poor coverage in an area.