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Ruth Peters, a child psychologist in Clearwater, Fla., said most children were not ready for their own phones until age 11 to 14, when they were in middle school.
Nearly 80 percent of teens have cell phones; more likely than adults to use mobile Internet. A new study by the Pew Research Center finds that 78 percent of Americans aged 12 to 17 have cell phones. And it says that three-fourths of teens access to Internet using mobile devices such as smart phones or tablets. That's a higher rate than adults, the study says.