| 摘要 |
A mobile communications device includes: a telephone directory storage unit for storing a telephone directory; a comparator for comparing a service identifier included in a received message with a service identifier stored in the telephone directory; and an update unit for updating the telephone number stored in the telephone directory. If the service identifier corresponding to the telephone number received in the message matches the service identifier stored in the telephone directory, the update unit updates the telephone number stored in the telephone directory with the received telephone number.
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