Hi all. Looking for just a little advice. Going to Bahamas at the end of August for a week. I will really be using my iphone as a camera. Might make just a few phone calls threw the week and a few txt. I'm assuming I should get an international package from AT&T? Also if when I am not using it can I just leave airplane mode on? I'm just afraid of missing something and coming home to a huge phone bill. Any one have some advice or experience with this?