Will a local SIM card purchased in one European country work in a different European country or is buying an "international SIM card" the best solution?
My wife and I will be traveling to Spain in March and plan to get local SIMS to keep in touch if we get separated. We have unlocked GSM phones, one of which I purchased in Italy a few years ago. Later in the spring, I will be traveling to Greece by myself. I'll be making a connection through the airport in Rome and if for some reason there is a problem with connections I would like to call the Athens hotel and let them know. Can I use the Spanish SIM rather buying a new Italian SIM at the airport for just one or two calls? When I get to Athens, what will work there? The original Spanish SIM or a local Greece one?
I have read on this site and many mothers reviews of just about every SIM (Mobal, Natl Geographic, CelloMobil, Telestial, Eurobuzz, etc. etc.) and when I think I have settled on one I find a very negative review by someone who had a terrible experience with the service, customer service reps, surprises on their bill, etc. Any help is appreciated.