What is advantage of dual band tri band quad band?

Basically, the difference lie on the frequency being used or supported. For GSM dual band phones, the frequencies that is can support are 900/1800 MHz or 850/1900 MHz; for tri-band phones, the...

Yes, they did the song, The Weight. The documentary "The Last Waltz" is about their last show together.

The i850 has neither. Quad Band refers to GSM phones that carry radios that can communicate on any of the four globally used bandwidths (850/900/1800/1900). Nextel uses IDEN radios, not GSM, so the...

dual band

Tri-band