Google, Samsung Top Mobile Market (GOOG, AAPL, SSNLF, MMI, RIMM, MSFT, NOK)

Research firm comScore Inc. (NASDAQ: SCOR) is out with its report on the US mobile phone market for the rolling three-month period through February 2012. The data shows that 234 million Americans now use a mobile device. That number includes all mobile handsets, whether smartphones or the older feature phones.

The leading platform among mobile devices is Android from Google Inc. (NASDAQ: GOOG) with a 50.1% market share. Apple Inc. (NASDAQ: AAPL) is second among platforms, with 30.2% share. Samsung Electronics (OTC: SSNLF.PK) leads handset makers with 25.6% share followed by LG Electronics with 19.4% share, Apple with 13.5% share, Motorola Mobility Holdings Inc. (NYSE: MMI) with 12.8% share, and HTC Corp. with 6.3% share.

Trailing Google and Apple on the platform side are Research in Motion Ltd. (NASDAQ: RIMM) with 13.4% share, Microsoft Corp. (NASDAQ: MSFT) with a 3.9% share, and the Symbian platform from Nokia Corp. (NYSE: NOK) with a 1.5% share. Google and Apple grew share by 3.2% and 1.5%, respectively. The others lost share — RIM and Microsoft — or stayed flat — Nokia.

In handsets, Samsung stayed flat while Apple gained 2.9% and HTC gained 0.4%. LG and Motorola both lost share.

The comScore press release is here.