We are traveling away from the kids in November, and I'm wondering if we should add an international plan to at least one of our phones while we are away. It's $10 per day if it's used, and nothing if we don't use it at all on any given day. I'm thinking it's probably a necessity to keep in touch with my mom who will have the girls? But we have never traveled away from them that far before, so I'm not sure!