Looking for clarification on calling/texting to Canada


This may seem like a no brainer, but I just want to be absolutely sure before I start talking to people in Canada on a regular basis. I have the Go Unlimited plan. The lowest one. It states that you can call & text at no extra charge as long as you don't use more that 50% of your data in Canada or Mexico in a 60 day period.

Does this mean you are physically in Canada/Mexico or the calls are made from the US to someone in Canada/Mexico?