Mobile Study: People use mobile primarily to check email Research from the Pew Research Center found that of all activity people use tablets and smartphones for, the old workhorse of email is still the most widely used. But the uses are changing. By Matt WilsonOct. 17, 2012 SHARE To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.