Some 63.2 million Americans owned smartphones in the three-month period ended December 2010, up 60% from a year earlier, according to data from comScore MobiLens. RIM led the smartphone platform ranking with 31.6% of US market share, while second-ranked Google accounted for 28.7%, up 34.1% from the three-month period ended September.

Apple accounted for 25.0% of US platform share as of December, up 2.9% from the previous three-month period, followed by Microsoft with 8.4% and Palm with 3.7%.

OEM Market Share: Samsung Broadens Lead

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