You phone plan includes international text messages? My service with a couple different US carriers didn’t. We had friends a few hours drive in Canada and needed a $5/mo add on to call/text. My experience when driving over the border is just losing service a dozen miles after crossing. I can’t remember exactly if text messages explicitly fail or silently disappear and never get received.
I usually don’t trust my phone to talk to international towers unless I explicitly check beforehand. I’m happy to sip off wifi or buy a local sim because I don’t really trust telecom companies. I usually completely disable cellular. I haven’t seen roaming data in years (not that I deal with this often). Companies prefer to just cut you off in my experience.
