Methods and systems to provide a home system with information about a wireless unit roaming in a visited system based on information the wireless unit provides to the visited system. A mobile switching center (MSC-V) of the visited system receives the information from the wireless unit and routes a message...http://www.google.de/patents/US7289785?utm_source=gb-gplus-sharePatent US7289785 - Method and systems for providing information to a home system regarding a wireless unit roaming in a visited system
