According to the Nielsen 2010 Media Industry Fact Sheet there are over 223 million U.S. mobile phone users over the age of 13
16.7 million of these users also access the web via their cell phones (up from 13 percent in 2008), according to the same study.
18 percent of mobile devices in the US are smartphones (up from 13 percent in 2008), according to Nielsen
8 percent of mobile device users stream audio, according to Nielsen
7 percent view video on their mobile devices, according to the study
25 percent of all mobile devices sold in Q3 2009 were smartphones. On that trajectory, Nielsen estimates that between 40- and 50 percent will be smartphones in 2010.
According to CTIA, The Wireless Association, the total minutes of cell phone use for Americans in 2009 was 2.3 trillion
Americans sent 152.7 billion SMS messages a month and 1.56 trillion over the course of the year during 2009, according to CTIA
35 percent of US adults have software applications (apps) while 11 percent are unsure if their phone is equipped with apps, according to the Pew Internet and American Life Project
Pew reports that, among cell phone users, 29 percent have downloaded apps and 13 percent have paid to download apps