Smartphones make up 40% of all mobile phones in the U.S.

poweredbytech:

According to data from Nielsen, 40% of mobile users over 18 in the United States now carry a smartphone. Android carries a 40% share of those smartphone owners, follwed by Apple at 28% and RIM falling to 19%. Windows Mobile users still far exceed Windows Phone 7 users at a 7:1 ratio.

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Under the fold is perhaps the more interesting bit: Amongst those who plan on getting a smartphone in the future, more intend to purchase Android phones than iPhones.