Pew study : 39 % of teens say they exchange text messages annually . Study finds that 63 % of teens say they never exchange e-mail . 39 % of teens from households earning $ less than $ 30,000 or more have a cell phone .
Pew study : 63 % of teens say they exchange text messages every day . Study finds that 39 % of teens say they never exchange e-mail . More than 90 % of teens from households earning $ 75,000 or more have a cell phone .