The latest report out of ComScores MobiLens service indicates that mobile device ownership and use continues to grow - 234 million American aged 13 or older used mobile devices (that's more than 90% of that age group). They also show smartphone penetration growing to 116.5 million in August, a 6% gain from last May. As a result, smartphones are used by about half of all mobile users, and around 37% of the U.S. population.
Looking at what mobile users do (other than make calls) - 75.6% sent text messages to other phones, 53.4% used downloaded apps, 52.0% used a browser, 38.7% accessed social networking sites or blogs, 34.0% played games, and 28.3% listened to music on their mobile device.
On the hardware side, Samsung remained as the top mobile device OEM, but a surge in Apple device ownership moved it into a close third (behind LG). Android maintained the dominant OS, growing slightly to 52.6% of the U.S. smartphone market. Apple's iOS also showed some growth in market share, being used by more than a third of devices (34.6%). Those gains primarily came at the expense of RIM's Blackberry system, whose market share dropped precipitously to 8.3% (down from 11.5% share in May). Microsoft and Symbian also saw their share of the OS market drop.
Source - comScore Reports August 2012 U.S. Mobile Subscriber Market Share, comScore press release