Every once is a while I get a screen on my phone that I cant figure out where it comes from or what is triggering it, or why its useful. It has big ICON buttons on it and one of them is Footprints and then others, like Mail and such. Anyone know what it is and how I can control it? or what good it even is? Seems ot happen a lot when I am in the car plugged into the power and when I pull in my garage....GPS related? Cant figure it out!