A method of transmitting one text message to a plurality of receivers is disclosed. The method includes inputting numbers of the receivers and a text message to be transmitted, determining a type of a transmission speed of the inputted text message, and transmitting the inputted text message of the determined type to numbers of the respective receivers. If the text message transmission succeeds, the method further includes confirming whether any further receivers of the text message exist and, if so, inputting new numbers of the further receivers and re-transmitting the corresponding text message to the new numbers of the further receivers. In inputting the phone numbers of the receivers, the sender can transmit the text message more rapidly and conveniently using the phonebook function and one-touch dial function.