Patent ID: 8175622

Claim:
A method for mobile communications, the method comprising: receiving, at a Home Public Mobile Network, a single subscription activation message from a subscriber at a Signaling Gateway (SG) having a SG address, the subscriber being associated with the Home Public Mobile Network (HPMN) and having a HPMN Subscriber Identity Module (SIM) with a corresponding HPMN International Mobile Subscriber Identity (IMSI) and a corresponding HPMN Mobile Station International Subscriber Directory Number (MSISDN); assigning one or more MSISDNs to the subscriber based on the single subscription activation message, wherein each of the one or more MSISDNs is associated with one or more IMSIs stored in the SIM and corresponds to one or more Friendly Public Mobile Networks (FPMNs) coupled to a Visited Location Register (VLR) and a Serving General packet radio service Support Node (SGSN), and wherein the subscription activation message is received from one of the one or more FPMNs; maintaining, at the SG, a local profile of the subscriber corresponding to each IMSI activated in the SIM; associating the one or more MSISDNs with the HPMN MSISDN to facilitate mobile communications corresponding to the one or more MSISDNs assigned to the subscriber; receiving, at the SG, mobile communications originating at the HPMN, directed to the one or more FPMNs, wherein the mobile communications include a Signaling Connection and Control Part (SCCP) message; registering the subscriber with one of the one or more FPMNs; receiving a mobile communication from the subscriber, the mobile communication having a location address, wherein the location address is selected from a group consisting of a VLR address, a Visited Mobile Switching Center (VMSC) address, and a SGSN address; replacing the location address with the SG address, wherein the SG address is associated with the HPMN; and issuing, at the SG, a cancel registration message to at least one selected from the group consisting of the VLR and the SGSN.