Smartphone Ownership Doubles Year Over Year to Nearly One-Third of Americans, Says New Arbitron/Edison Research Study

COLUMBIA, Md., April 5, 2011 /PRNewswire/ -- The percentage of Americans age 12 and older who have a smartphone has more than doubled in the past year, from 14 percent to 31 percent of the population according to the new national survey from Arbitron Inc. (NYSE: ARB) and Edison Research, The Infinit

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