A mobile station-based locator system is disclosed including a GPS-enabled mobile station in communication with a E911-enabled wireless network. The mobile station may include a Subscriber Identity Module (SIM) card configured to notify a subscriber when the mobile station is near a forbidden zone using...http://www.google.fr/patents/US20070111703?utm_source=gb-gplus-shareBrevet US20070111703 - Mobile station-based locator system
