AT&T/Cingular has really great international calling plans that are very cost effective
. Thus you are able to still travel throughout the world without having to worry about roaming and international call fees. Also, if you use data on your iPhone, which most of you do, you will want to make sure that you have an international data plan as well. The worst homecoming surprise you can get is opening your cell phone bill only to find several hundred dollars worth of extra charges and fees. However, if you plan ahead and make sure that you obtain a new service plan that includes international cell phone use, you will not have to worry about extremely high charges.