ROAMING METHOD AND APPARATUS FOR MAKING THE SAME

摘要

The roaming process allows a subscriber of a home public land mobile network (HPLMN) to be connected to a visitor public land mobile network (VPLMN). This is done without a roaming agreement with the home public land mobile network, when an international mobile subscriber identity (IMSI-PPLMN) is made available by a partner unit (PPLMN) having a roaming agreement with both mobile networks. The connection to the visitor public land mobile network can be established by replacing the international mobile subscriber identification (IMSI) for the home public land mobile network with the partner network identification on the subscriber identification module card (SIM).