I bought the single devise plan and have a question. Is that just 1 devise period or 1 devise at a time? I have 2 tablets, one I have fun with and another to access my email and read books. Since our phone provider does not have an international plan the only way we have to keep in touch is through email. I would still love to play my games on the other tablet but if I can’t use it I don’t have to bring it along.