A new study by the Pew Research Center's Pew Internet Project reports that 35 percent of American adults now own smartphones. Of those owners, some 35 percent use an Android device, while 24 percent use an iPhone and another 24 percent use BlackBerry. In addition, 25 percent of smartphone owners do most of their internet browsing on the device.

Neilsen reported smartphone adoption in the US at 31 percent earlier this year, which square well with Pew's new numbers. Last fall, Pew reported that 9 percent of adults have downloaded a health and fitness app.

Other statistics from the report focus on groups with high percentages of smartphone owners, those include: adults living in a household earning an income of over $75,000 (59 percent); those possessing a college degree (48 percent); those between the ages of 25 and 34 (58 percent); those between the ages of 35 and 44 (44 percent); African-americans and Latinos (44 percent).

A majority of higher income earners own smartphones now. A majority of those between the ages of 25 and 34 are now smartphone users. The numbers make clear that soon a majority of all mobile phone users will be using smarphones.

You can read the full Pew report here. (PDF)