No error message pops up on the phone it will play music and I'll be using other apps on my phone then out of nowhere it will shut down the app why is that  I'll be playing music and using other apps on my phone  and randomly it will just close the application and ill have to open the app again for it to play music again. Why does Pandora keep shutting it self off and I have a revvl 4 from T-Mobile what can I do to fix it  ... View more