Patent ID: 8036649

Claim:
A mobile communications device comprising: (a) a telephone directory storage unit for storing a telephone directory comprising one or more service identifiers, each said service identifier being associated with a telephone number stored in said telephone directory storage unit; (b) a receiver for receiving a message comprising at least one telephone number and at least one associated service identifier; (c) a comparator coupled to said telephone directory storage unit and said receiver for comparing the or each said service identifier of said received message with the or each said service identifier stored in said telephone directory in said telephone directory storage unit; and (d) an update unit coupled to said comparator for updating the or each said telephone number stored in said telephone directory, wherein if the comparator determines that the service identifier corresponding to said telephone number received in said message matches the service identifier stored in said telephone directory, the update unit updates the telephone number stored in said telephone directory with the telephone number received in said message which is associated with said service identifier.