I was uploading a picture to a contact profile on my Iphone 4 which is running on iOS7. It was taking a while to load and when i went to check on it the whole screen faded to a blue-ish black colour. I can still tell the screen is on because it isn't completely black. But the phone itself is 100% unresponsive. I tried the 2 button restart and that is not working. I tried charging it, I tried plugging it into itunes. Nothing is working.