You’ve read the horror stories of foreign trips with the iPhone. I will give you one word of advice to save big money. Turn your iPhone to Airplane mode for the whole trip. I visited Mexico and took it off airplane mode for 1 day, yes 1 day. The phone transfered data constantly and it gave me a nice little $45 extra juice on my bill at the end of the month. Nothing like $3 each emails, and $10 accidental hit of the safari button. I knew in advance the cost and the airplane mode thing so I probably saved myself a few hundred dollars. I hope I’ll save you some as well.