Patent ID: 7379436

Claim:
A system comprising: a first communication system comprising a home network and a visited network, the home network having a subscriber and a Home Location Register (HLR), the subscriber having a mobile device and a profile in the HLR; at least one Voice-over Internet Protocol (VoIP) communication system coupled to the home network and the visited network; and a gateway coupled to at least one of the first and the VoIP communication systems, wherein the gateway monitors roaming links of the first communication system and detects the mobile device registering with the visited network, wherein the gateway receives location information corresponding to a location of the mobile device and selects a VoIP routing number corresponding to the location, wherein the subscriber's HLR profile is set, via a SS7 message, to transfer calls for the mobile device via the selected VoIP routing number, and wherein the gateway uses the selected VoIP routing number to transfer calls for the mobile device received at the home network to the mobile device via the VoIP communication system.