I will be traveling abroad soon and wanted to know how to use the iphone 4s features - camera,internet,wi-fi,music etc without using the calling feature. Do I need to call att and ask them to block my data so that there is no charge. When I get into the plane do I need to put it on airplane mode? and keep it that way rest of the trip. Also, I will be taking my macbook (2007) and would need adapter to charge both iphone and macbook. The apple travel kit is around $40 is there anything cheaper which can do the same thing cheaper which I can buy from Amazon or something. Also, I would like be able to facetime my in the U.S, how can I do that with my iphone 4S. Haven't used facetime much.