Wireless devices such as Apple's iPhone are transforming the way we go online, making it possible to look up driving directions, find the nearest coffee shop and update Facebook on the go, the Associated Press reports. All this has a price--in airwaves.


As mobile phones become more sophisticated, they transmit and receive more data over the airwaves. But the spectrum of wireless frequencies is finite--and devices like the iPhone are allowed to use only so much of it. TV and radio broadcasts, Wi-Fi networks and other communications services also use the airwaves. Each transmits on certain frequencies to avoid interference with...

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