Out of nowhere there is an "Emergency Call" button on my lock-screen display. It was NOT there 24hrs ago. From what I've read this is a lock-screen feature, but I will NEVER use it. My lock-screen is set to "swipe" so why in the @!$##@ would I need that button? What app or feature suddenly but it there within the last 2 days? How do I get rid of it (if possible)?