yesterday i had downlaoded the skype app then a few hours later i was using my phone when it suddenly started saying the app has closed unexpectedly everytime i tried to open any app or program. so i turned it off took out the battery now when i turn it on it will show the screen with my provider then go to a black screen that keeps saying android across it, like a start up screen but it dont do anything more than go to that screen and stay on it. what do i do?