US smartphone adoption

CTIA: 96 million smartphones in US
By Chris Gullo | 09:46 am | October 12, 2011
Pew: 35 percent of US adults use smartphones
By Brian Dolan | 11:31 am | July 11, 2011
Why Oprah's app is important for mHealth
By Brian Dolan | 01:05 pm | April 30, 2010