4. From the Recovery Menu do a total data erase (including Delvik Cache). When completed, go back to Recovery Principal Menu and choose Flash ROM from SD Card. Navigate the location you copied the ”HTC Flyer Tablet_4.1 Jelly Bean.zip” file and follow the directions for installing Android 4.1 Jelly Bean on your HTC Flyer Tablet. As soon as the installation is over, just reboot your HTC Flyer Tablet device, and here you go, you’ve just upgraded it to the new Android 4.1 Jelly Bean