Method and System for SIM Card Reregistration Control in a Mobile Communications Network

A method for registering a mobile device on a mobile telecommunications network, comprising:

• controlling SIM card reregistration upon movement of a mobile terminal out of an operating range of one radio network into an operating range of another radio network,
• wherein SIM cards are reregistered by a mobile virtual network operator using:
• a plurality of servers, each of which is connected to a switchboard of a basic operator of the one radio network, and
• a managing server that supplies a request of the mobile terminal for reregistration of a SIM card thereof to one or more of the plurality of servers connected to the switchboard of the basic operator of the one radio network.

A telecommunications system comprising:

• a plurality of radio networks;
• and
• a plurality of mobile terminals, each having a SIM card,
• wherein reregistration of SIM cards of the mobile terminals are provided as the mobile terminals move out of an operating range of one radio network of the plurality of radio networks, into an operating range of another radio network of the plurality of radio networks,
• wherein the system further comprises a mobile virtual network operator having a plurality of servers, each connected to a switchboard of a basic operator of one of the plurality of radio networks, and a managing server that is connected through communication channels to each of the other servers of the plurality of servers of the mobile virtual network operator, and
• wherein the mobile virtual network operator is enabled to receive and transmit requests of the mobile terminals for SIM card reregistration to the servers connected to the switchboard of the basic radio network operator.