Patent ID: 7493124

Claim:
A method for updating information within a communication system, the method comprising the steps of: engaging, by a first wireless network, in a call with a mobile unit that wirelessly interfaces with the first wireless network; receiving a message from the mobile unit on the first wireless network, wherein the message was placed by the mobile unit utilizing a second wireless network wirelessly interfacing with the mobile unit and wherein the message is a message taken from the group consisting of a short message service (SMS) message, an email, an IP ping, a data call, a web request, a multimedia message, a push-to-talk call, and a call alert message; determining, by the first wireless network, identification information from the message; associating, by the first wireless network, the identification information with a particular mobile unit and with a particular mobile unit attribute that needs updating; and updating, of a database and by the first wireless network, location information for the particular mobile unit based on an address of the received message and to reflect the fact that the particular mobile unit is no longer associated with a Wireless Local Area Network (WLAN).