According to comScore, 69.5 million people in the U.S. owned smartphones during the three months ending in February 2011, up 13 percent from the preceding three-month period. Google Android grew 7.0 percentage points since November, strengthening its No. 1 position with 33.0 percent market share. RIM ranked second with 28.9 percent market share, followed by Apple with 25.2 percent. Microsoft (7.7 percent) and Palm (2.8 percent) rounded out the top five.
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