Wi-Fi in flight has yet to soar

Launched four years ago, the use of Wi-Fi on U.S. airlines has yet to catch on, with estimates that the wireless technology is still used by only 7 percent of the flying public. There are a number of reasons: With Wi-Fi cropping up for free in many airports and public locations, passengers don't want to fork over as much as $10 for a flight of a few hours. Passengers also may not know when Wi-Fi is available on a flight since the airlines provide the wireless service on only a small percentage of their planes.

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