I think some are just being confused by the GPS Sat Icon (dish with green waves, that I guess kind of looks like it could be an ear with waves coming out of it) and the Location Services Icon (Target Icon) is all. Location Services is allowing programs access to where you are (through Network Triangulation, as well as probably through GPS if its on). The GPS Sat Icon won't even show up unless your phone is actively seeking/syncing with GPS satellites, so even if you turn on GPS, that icon may not show up unless you or something on your device does something which requests your location, via the GPS radio.