We will be traveling to Germany, Austria, and Italy for a month. Doing something with our own cell phone company is out, as we would have to add an international line to our plan and buy a new phone. What is the cheapest, best way to keep in contact with our USA family as well as our German family we will be visiting for the 1st half of the trip? I have heard of renting a phone, buying a phone, and just getting phone cards and using them at pay phones/ hotel phones. Help!