Today, all of a sudden my home button stopped working properly, when I clicked it, it wouldn't do anything except take me to my contacts, which is a shortcut I have. The phone wouldn't get out of the phone app no matter how hard I press the home button, and when I would try to power the phone off, the option wouldn't come up. I know it's not a hardware problem because when I double click it, it takes me t my shortcut. Does anyone know what's wrong??