If you’re an eligible AT&T Mobility customer, you must also subscribe to the Fullscreen service and download the Fullscreen app. We’ll take care of the rest. The offer is only good for 12 months of Fullscreen service, and must be redeemed by April 30, 2017. You must remain an eligible AT&T customer during the entire 12 month period. Fullscreen or AT&T reserve the right to change this offer at any time. Fullscreen or AT&T will provide advance notice if we discontinue this offer.