Unlink a madden mobile account from facebook

Linking it to Google play games or the device itself from the device you want it on should remedy that. Not sure why it won't let you disconnect/log out of the Facebook sync on the current device. But if he logs in with Facebook from new device & uses either secondary lync option or both it should free you from it in theory. Then go to Google play and remove it from the "my apps & games" icon in the menu icon in top left corner, go under "all" in the apps page after you Uninstaller from your device and click on the "X" next to madden mobile to completely remove it from your devices app history & permissions. I hope this helps the both of you get it resolved. All the best to you guys, happy holidays.