Okay, so my dad is completely technology illiterate. He doesn't even understand that you don't click on internet popups. He's got a phone with Android 5.1.1 and he says he downloaded an app called Force Stop. Now when you turn on or unlock the phone, it goes through this big list of apps that its forcing to close including his calling app. You can't make calls cause it closes the app before you can dial the number. I can't figure it out guys. What has he done to this phone and how can I fix it?