Patent ID: 6990331

Claim:
A mobile terminal including a receiving circuit for receiving a message having text data transmitted by radio through a telephone network, a display for showing a message received, a memory circuit for storing a message received, and a control circuit for controlling operation of the receiving circuit and the memory circuit, the control circuit comprising: means for preparing check data by performing a predetermined operation expression to data for one or a plurality of predetermined fields out of a plurality of fields constituting a received message; check data comparison means for comparing the check data prepared for a received message with check data prepared for a message stored in the memory circuit in receiving the message, and indicating whether the two check data are the same; first message storing control means for comparing only a received message having the same check data as a check data for a message stored in the memory circuit with a stored message having the same check data, and when the two messages are not same, newly registering the received message in the memory circuit; and second message storing control means for newly storing, in the memory circuit, a received message having check data different from check data for any stored message without comparison of the messages.