According to a 2015 report by the Pew Research Center, 96 percent of all US adults own a mobile phone, and 68 percent own a smartphone. Among US smartphone users, 97 percent of them regularly use their phone to send text messages, 89 percent use it to access the Internet, and 88 percent send and receive email.5 Worldwide estimates are that 3.2 billion people, 45 percent
