That comment introduces some confusion with "moving travelers from paper tickets to the use of their phones" before giving a mixed list of benefits of e-tickets and mobile boarding passes.
E-tickets were introduced in the 1990s, and essentially all airlines were using them by 2008. They don't have anything to do with phones. Mobile boarding passes are a more recent development.
E-tickets were introduced in the 1990s, and essentially all airlines were using them by 2008. They don't have anything to do with phones. Mobile boarding passes are a more recent development.