Quote Originally Posted by Brian@Chicago View Post
I have taken my various iPhones a few times. It's not airplane mode you want to be in, because that shuts off your wifi, too. International Data Roaming-->OFF is what you want to be on, unless you have an International Data Plan. That will allow you to access all wifi services still, and also make calls at $2 a minute, so probably not for everyday use, but you can still make calls and (I think) send and receive texts for a reasonable amount. The second you turn International Data Roaming on, you will start sucking all kinds of data and you'll pay for it when you get home.
You can leave it in airplane mode, then turn wifi back on.