With the recent discovery that Apple's iOS and Google Andorid phones "logged your location" data and that it was possible to take the stored data and turn it into a graphic that showed your previous location. Microsoft has confirmed that "Windows Phones don't store location history in a manner similar to the iPhone, which records the location data in an unencrypted file."
Microsoft told PCMag that;
"phones running Windows Phone 7 don't store location history. Like most other phones, the platform offers plenty of location-based apps, and those apps require user consent before they begin tracking. Windows Phones also offer the common feature of a "global switch" that lets the user disable all location services, and Microsoft says its "Find My Phone" service keeps only the phone's most recent location."
PCMag also contacted Nokia, RIM, Google, and HP about how the companies' mobile platforms store location data, and none, save Microsoft, have responded.