answer:Your phone may not be compatible with the telephone networks in Europe. In any case, if you’re leaving from the USA, you’ll be at least 5 hours ahead of the US East coast, and farther ahead of the other time zones. So communication will be spotty in any case with your friends and family that much out of phase. (When I travel overseas I just turn off my phone when I get onto the plane “there”, and turn it on again when I land “here” – unless I use its clock features while I’m away. It’s just not going to work where I’m going, and there’s no one I’m talking to in any case. I use the computer and send emails to folks back here.) If the trip is all-inclusive, then you won’t need much cash at all. Whatever you feel like carrying should be fine. It’s been a long time since I’ve traveled to Europe, so I can’t suggest a number now, anyway.