Originally Posted by
GadgetFreak
I have several Tri Band phones that work everywhere but Japan and Korea and quad bands wont work there either. It just depends on what the three bands are.
Quad band is needed in some areas of the US. I know here, northern MN has tons of new GSM coverage, but without a quad band phone, it won't work. They are putting GSM on some of the "old" cell frequencies, which isn't covered with most tri-band phones.