I have the TMo Simple choice plan. Ok, TV commercial showed the SC New North American Plan which now includes Canada and Mexico. Plus 6gigs of data, which I had 5. The new plan is cheaper, so I switched. Saving $5 and I get an extra gig of data. So I called TMo just to confirm and ask a few questions. It would to be my advantage to switch so I did.
CS rep did offer to sell me quite profusely I must say; a data package for overseas. Saying that WiFi calling isn't very good should I use it. He also said that Wifi wasn't always available. I'll be in Paris and Amsterdam. However, I know better and thanks to FTers I'm confident I can succeed.