comScore today released the results of its monthly rolling survey of U.S. mobile phone users for the December-February period, revealing that Apple's smartphone market share rose 3.9 points from November to February going from 35% of total U.S. smartphone platform and hardware sales to 38.9%. Last month's report demonstrated similar growth for Apple. Samsung was the hardware manufacturer with the second largest share of the market at 21.3%, up from 20.3%. HTC, Motorola, and LG all experienced slight drops in market share. Google's Android is still ranked as the top sma