Patent ID: 8467782

Claim:
A mobile communication terminal, comprising: an attachment module configured to provide, during attachment and prior to completing attachment and connection to either of a home network and a visited network, a request to attach to the home network through the visited network when the mobile communication terminal is roaming, wherein the request includes i) a request to use a first packet data network (PDN) associated with the home network, and ii) a request to use a second PDN associated with the visited network; a response module configured to receive a response to the request to attach from the home network, wherein the response includes i) a first tag associating a first IP address with the first PDN, and ii) a second tag associating a second IP address with the second PDN; and a communication module configured to communicate with the first PDN through the home network by selectively using the first IP address, and communicate with the second PDN through the visited network by selectively using the second IP address; wherein the request to attach includes access point names (APNs) that identify at least one of the first PDN and the second PDN; and wherein the response includes i) a first of the APNs appended to the first IP address, and ii) a second of the APNs appended to the second IP address.