Eighty-five percent of Americans currently own cell phones . Three-quarters of Americans ages 18 to 34 own an MP3 player , but only 56 % of the next oldest group ( 35 to 46 ) do . 29 of all U.S. households have gone mobile phone-only . Eighty-five percent of Android own e-reader devices such as the Nook or Kindle .
Eighty-five percent of Americans currently own cell phones . 29 of all U.S. households have gone mobile phone-only . Eighty-five percent of Android own e-reader devices such as the Nook or Kindle .