| 摘要 |
A method of operating a mobile telecommunications apparatus in a telecommunications system where the apparatus includes means for making outgoing telephone calls via the system, means for receiving a user generated input defining a call destination and routing means for selecting a preferred route to the call destination via the system for an outgoing telephone call by referring to routing information stored in the apparatus. The method includes registering with a network of the system which is local to the current location of the apparatus, receiving network identification information from the local network, determining from the network identification information whether the stored routing information requires updating, and outputting a request message for receiving updating information for updating the stored routing information if the stored routing information is determined to require updating.
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