Your MAG Box device is under Android TV, so you will have to install the Smart STB app from Google Play, then go to the customer area on the app's website and use its software ID to switch your license to the new one. The last thing to do is to make sure that the virtual MAC address displayed by Smart STB after switching licenses is the same as the one you provided to your provider, as it will not work if it is changed. Since your MAG is under Android TV, another easier way is to contact your provider and ask him to switch your account to the M3U link in order to provide you with Xtream codes to use on IPTV SMARTERS or other free other applications.