iPhone 5s Freezing
My iPhone 5s will sometimes freeze when I hit the home button twice to close an open app. I have updated to the latest update. I try a hard boot by pressing the home key and the sleep wake button. It will take a little while before it responds. I then hold the sleep wake button until I get the sign off. It some times will happen three or times until I give up and leave it for a while.
iPhone 5s, iOS 8