comScore today released the results of its monthly rolling survey of U.S. mobile phone users for the January-March period, showing that Apple's smartphone market share rose 2.7 points from December to March, from 36.3% of total U.S. smartphone platform and hardware sales to 39%, marking a record high share for the company. Samsung was the hardware manufacturer with the second largest share of the market at 21.7% in March, up from 21% in December. HTC, Motorola, and LG again experienced slight drops in market share, with HTC suffering the heaviest loss going from 10.2% to 9%. Google's Android continues to be ranked as the top smartphone platform with 52% of smartphone pl