How can I use my iPhone 3G economically in China? I'm traveling to China and would like to use my iPhone there. I would not like to pay AT&amp;T's crazy and predatory charges. What should I do? I don't have much time and want something low on the 'things can go wrong' scale. Oh, and I have a dinosaur 3G, and a 4G.
You can turn on airplane mode, but enable WiFi (Or you could get an iPad with only WiFi), then make calls through FaceTime, or Skype equivalent.

Impossible that you could be charged, but you would have to be near a Wi-Fi source for it to be useful.