System, method and intelligent to access a plurality of networks card.

摘要

A mobile telecommunications system comprising a plurality of different predetermined networks (18, 20); a plurality of terminals for use in the system; a plurality of smart cards, each terminal being usable in one of the networks (18, 20) in particular, in association with a smart card when the smart card is registered with that network; and means (10) for recording each smart card in a network in particular as the main network, each carrying smart card secret information specific to the main network (18, 20) which is registered smart card and whereby that network can authenticate the smart card and allow use of the terminal with which that smart card is associated with that network (18, 20); and wherein the means (10) register is adapted to unregister each smart card in the network in which it is registered as its home network and reregistering each smart card with a common additional network as its home network and is not included in the predetermined networks (18, 20), by obtaining data from said one of the networks (18, 20), by the recording medium, including an International Mobile Subscriber identifier - IMSI particular that additional network and for use in the same, transmitting said IMSI to the smart card, and activating the secret information relating to one of the networks (18, 20) in particular when registering or reregistering said smartcard said additional network (18, 20).