Howstuffworks "How Cell Phones Work"

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EXPLANATIONS Cell Phones Buying Guide How Buying a Cell Phone Works How Cell-phone Radiation Works EXPERT REVIEWS Cell Phone Reviews PDA Reviews Ce...

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Cell Phones Work , then you know what each of these terms means. Look for dual mode/dual band phones if you travel a lot...
VoIP, on the other hand, uses packet switching . We'll look at packet switching and VoIP in more detail next.   &nb...
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To maintain compatibility with the existing AMPS cellular telephone system, the primary forward and reverse control chan...