In the US, just added Data Roaming to my account through my computer. How do I know that it is activated on my cell phone which has been off since I left Canada. I just turned my cell on and it shows T-Mobile... is that the roaming company for the US?
Do you mean you added the "International Data Roaming" add-on? That's not needed to use data in the US, only outside of NA but good to have none the less.
If you meant east roam then you should be able to see this listed under your add-ons and should have received and email confirming you added it.
And yes, T-Mobile is one of Koodo's US roaming partners.