A method, system, and apparatus, including a program encoded on computer-readable medium, for routing communications to a mobile device includes registering a cellular telephone identifier with a visitor location register associated with a bridge mobile switching center adapted to receive communication through a cellular backbone network and route communications over a packet-switched network and determining that cellular communications using the cellular telephone identifier are disabled. A home location register associated with the cellular telephone is notified that the cellular telephone is roaming in a network served by the visitor location register. A communication directed to the cellular telephone is received at the bridge mobile switching center. The received communication is routed to the cellular telephone.