The image of the affluent and white cellphone owner as the prototypical mobile Web user seems to be a mistaken one, according to a report published Wednesday by the Pew Research Center’s Internet and American Life Center.

The study found that African-Americans and Hispanics continue to be more likely to own cellphones than whites and more likely to use their phones for a greater range of activities.

This increase in mobile Web use, first noticed in a similar study by the Pew Center last summer, is driven both by age and economics, according to Aaron W. Smith of the Pew Center.

Younger people and people living in households making less than $30,000 a year are increasing their mobile Web use at particularly fast rates, he said, and the African-American and Hispanic populations are younger and poorer relative to the white population.

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