Hi, I'm planning a European Delivery trip in July and plan on driving through Germany to Alpine resorts in Austria and Switzerland with my son. I'll be using my phone for GPS navigation while driving.
We both have unlocked iPhones so I would like to get SIM cards, primarily for data/texting, that will work in all three countries. Everything I've read is confusing as far as EU roaming, rules for buying, etc. We will start our trip in Germany, then head to Austria and Switzerland last. Is it more economical to get one SIM for Austria/Germany (EU) and a different one for Switzerland? Or is there one that would work for all three? We will be there for two weeks so $10/day x 2 AT&T roaming is pretty steep.