T-Mobile may work for ADMIN-1 but my quad band did not work for me in March.
I switched from T-Mobile to Cingular/AT&T specifically for that reason. As of early May my quad band works everywhere I go except for Asia. The rate is $2.99/min for international calls to CR. Even if you dial a local number when in CR it will still be billed as an international call. The good news is that you do not need to dial the "+" when making a domestic call in CR as you are on the I.C.E. network. Any calls to the US will need the "+" when dialed.
Asia, Japan and Korea mostly, uses the 3G band width so you need a totally new phone. The good news is all you have to do is swap SIMS. Again international rates apply. Most of the major cell phone carriers will be switching over to 3G in the next few years anyway.
I have researched each of the larger mobile phone carriers. Cingular/AT&T are the only ones that have a formal agreement with I.C.E. . At least they are the only ones that publish it. T-Mobile has been in negotiations with I.C.E. but are very closed mouth about it. Sprint does not even list CR and some other Central American countires. Sprint has great advertising but lousy international coverge. Tried them already.
Any cell phone carrier does require you to activate international priveledges. Some charge you for it others are free. Cingular and T-Mobile DO NOTcharge for international priveledges. Rates can be anywhere from 1.99/min to 4.99/min. And you WILL be charged even if the call does not go through. Believe me, I just got my bill. There will also be additional charges which can add up, mostly in the form of taxes.
Bottom line: You are ROAMING so the charges are at the maximum.
Because I am in the states about 4 to 8 months of the year, the rest of the time I'm not sure where I am, I chose a cell phone carrier based on my needs for international and domestic calling. Cingular fit. The others did not. ( T-Mobile was a great second choice.)
Maybe I'll change my handle to GlobeTrotter it may be more fitting.
Make sure your phone is unlocked when you get it. That way you can get a local number any time you are over seas and the savings are well worth it. If it is not unlocked contact your carrier and get the code. It is a simple process to unlock it. If your phone is not SIMs equipped all bets are off.
I have posted on this subject earlier.
And NO, I do not work for a cell phone company.

Hey admin's; any chance of getting a spell checker for those of us keyboard impaired when posting? and yes I am joking.
