The number of teenagers in the U.S. who own smartphones is expected to reach the 74 percent mark this year, compared to less than 50 percent in 2013, according to eMarketer. The survey found that ownership among adult millennials is more than 90 percent. EMarketer forecasts that 88 percent of 12- to 17-year-olds will have mobile phones by the end of the year, and among those, 84 percent will have smartphones. “Results of a February 2016 survey for Adestra by Flagship Research give an indication that older teens are more likely than younger ones to have smartphones,” reports eMarketer. “Among the 14- to 18-year-olds polled, 87 percent said they ‘own and use’ a smartphone.”