Sprint is implementing sweeping changes to its upgrade and return programs that are likely in anticipation of its iPhone 5 launch. New leaks from the company's Playbook newsletter show that it quietly dropped the Premier yearly upgrade program at the start of the month, confirmed by the official page. As explained by Sprint and AndroidCentral, existing members will have until the end of 2012 to claim an upgrade, after which they'll be dropped into the regular New For You upgrade plan.
