By the end of 2011, the iPhone will have lost its title as the No. 1 smartphone in the U.S., eMarketer estimates, with Google's Android operating system surging ahead to first place. Android will be installed on 37% of all smartphone handsets in the country by year-end, while Apple will see a slight increase from 28% of the market last year to 29% this year. "Within two years, Google and Apple will control nearly three-quarters of this key segment, making it very difficult for contenders like Microsoft and RIM to achieve scale," said eMarketer Principal Analyst Noah Elkin. For more of eMarketer's coverage on smartphone market share, click here.
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