I have about 25 users who have company supplied iPhones. They travel overseaes quite a bit, and I have them all on unlimited domestic data and voice plans. I also have all the features offered for International travel (World Traveler, International data plan, etc..), however some of them come back from a weeks trip with a MASSIVE bill. Does anyone have good suggestions that I can type up in an email to these users specific to the iPhone that will minimize costs or at lease make them aware of the charges that they are incurring? Thanks.