Abstract: An automatic dialing method of a mobile telephone system linked to a mobile telephone network including a first memory and a second memory storing pre-registered telephone numbers of selected subscribers and abbreviated numbers corresponding to the telephone numbers. The automatic dialing method requires determining whether one of a telephone number of a called subscriber and an abbreviated number corresponding to the telephone number is entered by an operator; sequentially storing the telephone number of the called subscriber in the first memory as each digit of the telephone number is being entered by the operator; determining whether a predetermined time period has expired after all digits of the telephone number have been entered by the operator and sequentially stored in the first memory; and automatically dialing the telephone number of the called subscriber for establishing a connection to the mobile telephone network upon expiration of the predetermined time period.