Strange thing for my blog, but I just had a bad experience trying to call my wife who is visiting a friend in Panama.
First this works for AT&T and for people with Smart Phones. My wife has a Samsung Galaxy II that is an “international phone”.
It is not the cheapest or the only way to do it.
Basically you have to add AT&T Standard International Long Distance to your wireless plan. If the phone you are dialing is an AT&T phone, you should be able to just dial it. No country code or any other special numbers. Be sure to add the area code. You can get a bit of a discount by adding AT&T World Connect® for $4 a month. It might be worth it.