Another month, another round of ComScore's US mobile studies. For the three-month average period ending in February 2012, 234 million Americans age 13 and older were found to be using mobile devices, with Samsung having its products in the hands of 25.6 percent of the American mobile market. Behind it came LG (19.4 percent, dropping from 20.5 percent), Apple (13.5 percent, a 2.3 percentage point increase), Motorola (12.8 percent, down from 13.7 percent) and HTC (6.3 percent, a 0.4 percentage point increase).

Overall, 104 million people were deemed smartphone owners, representing a full four million person uptick since just last month. Over on the platform side, Android managed to surge from 46.9 percent in November of 2011 to 50.1 percent, while Apple rose from 28.7 percent to 30.2 percent at the expense of RIM and Microsoft; those two managed to lose between two and three percent of their market share over the same period, but we're guessing the tide will turn for Microsoft as soon as that hotly-anticipated Lumia 900 gets to shipping. Eager for more charts and call signs? Head on down to the source.