Therefore, cell phones will not be completely out of classrooms anytime soon. Cell phone ownership among young people and children has skyrocketed in the past few years. A Pew Research collaboration with the Berkman Center for Internet and Society at Harvard University reported that as of 2013, 78 percent of teens ages 12 to 17 owned a cell phone, 47 percent of which were smartphones.

Source: Could smartphone bans help students achieve more? (+video) – CSMonitor.com