I hope this is a reasonable place to ask this question. My wife and I are taking a long European vacation this summer. We have a few communications needs that I'd like to know how I'll deal with long before we get there. What we want. - to be able to 'phone home' - to have cellular internet access - to have GPS What we've got right now are a couple iPhone 6 handsets (under contract to AT&T), but I was thinking of buying a new iPad Air2 w/cellular. If I do that, will I be able to buy a SIM once we're there, pop it in my iPad, and have internet that also could be used for Skype and GPS maps? Am I correct in thinking our phones are effectively locked out for the trip when there's no WiFi? We are going to mostly be in France, but also a week in Florence and a week in Austria and several days in England at the beginning and end. Will have a rental car for a few weeks in the middle so need the GPS. Thanks in advance.