Argentina - Cell phone Frequency for Argentina (& Chile)

Do I need a quad-band cell phone for Argentina and/or Chile? What frequency is used -- 850, 900, 1800, 1900?? (Search only brought me to the "shared" cellphone that is/was loaned out, and to the area codes necessary.) Thanks.

For GSM, 850/1900 is used in both countries.

Please see here for details....

http://www.gsmarena.com/network-bands.php3?sCountry=ARGENTINA

Thank you both -- and, Alex, that gsmarena link is super!:D

For some reason GSM Arena has the wrong info. about 1800. If you need an updated list, check GSM Word

Argentina
http://www.mobileworldlive.com/maps/network.php?cid=3206&cname=Argentina

Chile
http://www.mobileworldlive.com/maps/#selectCountry

the rest of the World
http://www.mobileworldlive.com/maps/#selectCountry

If you live in EU, get a Quad band, because Dual and Tri-band in EU are 900/1800 or 900/1800/1900 ;)

Thanks for the update.

Thanks fede, didnt realize it was not updated.