One other comment about AT&T/Cingular...if you have a tri- or quad-band GSM phone, you don't even need to take it into a store. Just call the number on the web site and tell them that you want overseas access enabled and that's it. We've done this with both Nokia and Motorola GSM phones. Unless you travel overseas a lot, then go with the no monthly cost and higher per minute option (we basically use this capability for emergency contact). Lastly, read the manual on your phone for any special actions when changing bands. My Nokia automatically switches (but is only 3-band), while my wife's Motorola requires a manual keyboard switch between US and international bands (but is 4-band so it works more places).