TECH
04/03/2010 05:12 am ET Updated May 25, 2011

Text Underground: Teen Finds A Way To Text 1,000 Feet Underground

As many city-dwellers know, it's hard to scrap together even a few seconds of cell phone service in underground metros or subways. But a student barely old enough to drive has just invented a new device that can send text messages from well below the surface.

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