Hi all, I know this has been asked in various forms countless times, but I couldn't find my exact question. Me, my wife and three kids will be in Berlin for a month. We both have iPhone 4 (att). data, calls overseas, etc are not important to us, but calling and texting each other while in germany is very important. What is the best way to do this? replace sims? would i need to jailbreak both phones? (if possible, i would rather not). buy/rent phone there? i have never done this, is it straightforward? costly? any help much appreciated.