Why hello there. I am facing a pretty frustrating problem with my GS4. I have recently tried installing an application from my Phone's storage, but guess what. It would not let me press Install. It does literally nothing whenever I press it.Cancel is working fine and so does scrolling up and down. Allowing installation from unknown sources is checked and I also tried it with older .apks that I had downloaded and installed but I got the same result. Tried rotating to see if it might be a problem with the screen, nope. What could it be? Is anyone else experiencing this?