Thanks for the info. I’ve added it to my travel info. I double checked and AT&T allows calling US numbers from other countries at no extra charge using wi-fi calling. As for any local calls while traveling in Europe I decided to pay the few extra Euros to get their package that comes with a French (iirc) number that gives unlimited calls and texts in 50 different countries/territories which will cover all the places I’ll be staying or transiting.