May I please ask for some help? I figured this might be unique enough for a separate thread.

Starting from scratch, I want to buy a new or used dumb phone just for calling and texting in Eastern Europe. I might visit the region for a week or so, once per year, or even less often. The phone will get its own number, and I don't care too much which country the number comes from. No data required -- again, just calling and texting. An eSIM is fine (as long as it doesn't require an app that in turn requires Google or Apple).

My primary phone will stay at home in USA. It's not a problem to go somewhere in London, for example, to buy a SIM card and complete the process in English. I'm also open to buying service from an American company if it's a better option.

Any suggestions on what kind of dumb phone to get and how to get service for it?