It was enabled for me by default, but the iOS location icon is always displayed on the Springboard when it's being used.<p>Also, Foursquare will constantly send you notifications saying "It looks like you're near Foobar, would you like to check in?". They make it very, very obvious that they're tracking your location.<p>It was a quick matter of going into preferences and looking to see what applications used location services recently to fix things up. The biggest offenders were Foursquare and the Google app. I ended up turning Google off completely, and disabled Foursquare except for when I have the app open. Problem solved.