| 摘要 |
<p>Methods and arrangements for use in a telecommunications system where the system includes a plurality of different predetermined networks, a plurality of terminals and a plurality of smart cards, each terminal being usable in a particular one of the networks in association with one of the smart cards when that smart card is registered with that network, and each smart card carrying secret information specific to the home network with which the smart card is registered and by means of which that network can authenticate the smart card and allow use of the terminal with which that smart card is associated in that network; the method including registering each smart card with a particular one of the networks as its home network, selectively de-registering each smart card from the network with which it is registered as its home network and re-registering each smart card with a different one of the networks as its home network by obtaining from said one of the networks data including an International Mobile Subscriber Identifier - IMSI - particular to and for use with that network, transmitting said IMSI to the smart card, and activating the secret information relating to a particular one of the networks when registering or re-registering the smart card with that network.</p> |
