Digital Trends - Everybody knows smartphones are all the rage amongst consumers, and market research firm Nielsen is putting some numbers behind that, with its most recent Mobile Media Report for the third quarter of 2011. Nielsen finds some 44 percent of all phones in use in the United States are now smartphones, and that smartphone penetration is even higher among younger adults: some 64 percent of adults aged 25 to 34 use smartphones, along with 53 percent of users aged 18 to 24.
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