Download this application on the Mac, which synchronizes your phone: petewarden.github.com/iPhoneTracker . Launch it, and look, where your device visited, on the map. Here is a fragment of mine:
An open source application, the developers claim that they intentionally introduce inaccuracies in the data so that it is not so terrible. I did not find any surprises with the phone, maybe someone will have better luck (or less;))