eMarketer estimates 78.9% of 12- to 17-year-olds in the U.S. will be smartphone users this year, putting them on par with the total adult...

eMarketer estimates 78.9% of 12- to 17-year-olds in the U.S. will be smartphone users this year, putting them on par with the total adult...

eMarketer estimates 78.9% of 12- to 17-year-olds in the U.S. will be smartphone users this year, putting them on par with the total adult...