What is Quad bands cell phone
What is a frequency band?
Cell phones use radio waves to transmit your conversations. These radio waves can be at different frequencies, just the same as regular radio stations are at different frequencies.
For example, if you're listening to FM radio stations, they are in the FM radio band (of course!) which is between 88-108 MHz. If you're listening to AM radio stations, they are in the AM radio band, between 0.55 and 1.6 MHz.
Quad bands cell phone can work in 850/900/1800/1900 MHZ,the quad bands cell phone can work all over the world.
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