To answer your question in a literal sense, check that it's unlocked so you have the option to use another cell service from there. And that your phone is compatible with that service.
As mentioned, you can't use Public services there.
As mentioned about using a voip app like TextNow, you could forward all calls to that number to be able to answer those calls in TextNow. Forwarding texts is a bit more work. The phone needs a text forwarding app and the sim needs to be in a phone and it needs to be left on and charged up - in Canada.
There's no way to use Public plan data anywhere other than in Canada.
