WHAT SI Dual band?

PLEASE TELL ME WHAT COUNTRIES YOU CAN PHONE, I KNOW QUAD IS WORLDWIDE AND TRI IS USA AND UK

Answer:

Dual bands that a phone supports two different frequency bands. Not meaningful without knowing which two bands and which technologies the phone will work with.

For North American TDMA and CDMA phones, dual-band indicates that the phone will work in both the 800/850 MHz band and the 1900 MHz band. Most current TDMA phones in the U.S. are tri-mode, meaning they can use both analog and digital in the 800/850 band. Dual-band CDMA phones can be dual-mode or tri-mode. Dual-mode phones only support analog or digital on the 800/850 band, while tri-mode phones support both. The 1900 MHz band is always digital.

A dual-band GSM phone supports two of the four major GSM bands. Depending on which bands, the phone may only work in certain parts of the world. A GSM 850/1900 phone will only in the Americas. A GSM 900/1800 phone will only work in Europe, Africa, Asia, and Brazil. A GSM 900/1900 phone will work on at least one network in most countries around the world.

For more information, see here

http://en.wikipedia.org/wiki/dual_band... The phone bands have nothing to do with what countrys you can phone. Weather you have a dual band, triband or quadband, as long as the phone has service you can call any Country in the world.

What band the phone has is only important if you travel outside of the country that you live in, but again, as long as you are in the country you live and your phone has a signal, you can call anywhere in the world

Cheers

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