cellphone
As one guy put it... the best in the US is Verizon (CDMA) system... As usual, the US is behind on the technology as the rest of the world, especially in Europe and Asia are on GSM. Cingular has GSM but limited.... However, you can go into these countries, say... Hong Kong or even Manila, and change the GSM chip on your phone to a much stronger GSM phone chip allowing you to receive and communicate with a much stronger signal at places not normally received by the likes of Voicestream or Cingular. I'm not sure exactly how it works, but there are very few places in the Asian communities here in the States that do this.. if I find them, I'll let you know. Nevertheless, GSM is the way to go with a minimum of a tri-band phone so you would be able to use it in most countries with a weaker signal. I know that in say, Belize, for example, my Verizon phone works because they're predominantly a TDMA/CDMA system. So, it depends on what system your destination is under.