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Tmobile ALSO Works QUAD GSM Band phone 2.99 per minute.
Strange, I have repeatedly checked the t-mobile site and they still do not report roaming in Costa Rica, nor does the ICE site.
http://www.t-mobile.com/international/coverage.asp I just called T-mobile and they say they do support roaming at 0.99 per minute. Can anyone confirm this?
Also, if you have a tri-band phone you do not need to upgrade to a quad-band phone. There are currently 4 frequencies used around the world with more to come. 850 / 900 / 1800 / 1900. In the US the frequencies used to be 900 / 1900 when the companies sold dual band phones. Europe and Asia have always used 900 / 1800, you could also get a dual-band there. International travellers would buy the tri-band 900 / 1800 /1900 and be perfectly satisfied. ICE runs on 1800.
Cingular / AT&T recently switched to 850 / 1900. So now they offer the quad-band phones. 850 is also being used in some other countries around the world. One final note on some quad-band phones. Many are dual-band switchable, so normally they run on 850 / 1900 but can be switched to 900 / 1800
manually if needed.