I have a Samsung Galaxy S5 and carry it in my pocket. I am constantly pressing the button, somehow unlocking it and either I call someone or I take screen shots of my phone. The screenshots are not as bad but I have called several people and did not realize it until they call me back. I have a I-Bison protective case on my phone. I took it off thinking that was doing it but even when I do not have the case it does the same thing. Any suggestions?