Samsung S4 using Nova Launcher My phone has shut itself down a few times lately, because of heat but no other warning signs. I do use FoxFi and nova launcher. Basically some texts weren't going through so I decided to reboot. Suddenly I get a samsung message warning me about different Operating Systems, push volume up or down to accept or cancel. I had recently accepted the samsung 'policy update' so I thought this was relating to my using nova launcher. So I accept it -- then in small writing I see Odin downloading etc... What?? I pull the battery even though it said not to. I rebooted and things look fine so far. What happened??