After doing a factory reset on my Samsung Galaxy Ace 2 I had a smart stay icon appear in my notification bar. The phone never had smart stay before the factory reset. Android version is 4.1.2, both before and after factory reset. Also, when trying to find settings about it, there are no settings to be found anywhere that correspond to smart stay. Smart stay also does not seem to work (screen display turns off after the same amount of time regardless of looking at the screen or not, screen brightness does not change with looking at screen or not, scrolling with my eyes does not work). Anyone know what this means?