From the Pew Internet & American Life Project:
On the eve of Apple’s unveiling of the iPhone 5, 45% of American adults own smartphones. They are particularly popular with young adults and those living in relatively higher income households; 66% of those ages 18-29 own smartphones, and 68% of those living in households earning $75,000 also own them.
More American adults own smartphones than own feature cell phones—that is, the phones that can be used as a phone and for texting, but do not have a smartphone operating system such as Apple’s iOS or Google’s Android. Some 34% of adults have a feature phone; 5% of adults say they do not know if they have a smartphone or not; and 15% of American adults have no cell phone at all.
These latest figures show that smartphone ownership has increased from 35% in May of 2011 to 45%, though there has been no change in smartphone ownership from figures that the Pew Internet Project found in a survey at the beginning of the year.
See Also: Mobile: Young Adults and Teens Lead Growth Among Smartphone Owners (September 10, 2012)
See Also: comScore Reports July 2012 U.S. Mobile Subscriber Market Share (September 4, 2012)