method for inputting letter in mobile communication terminal

PURPOSE: A method for inputting letters of a mobile radiophone unit is provided to easily and promptly input words without inputting letters in every thing when a user inputs predetermined words. CONSTITUTION: An operation mode receives the first letter of an input word through a letter input part in a letter input mode(S10,S12). A control part control an input letter display part to display the input letter(S14). The words stored in a memory part are searched and it is judged whether the word starting with the letter input through the letter input part exists(S16,S18). If not exist, the function of a general letter input mode is performed to receive all letters forming the word and to display the input letters in the input letter display part(S20). If exist, the searched words displayed in a word list part(S22). It is judged whether the word in the display words are selected(S24). The selected word is displayed by controlling the input letter display part(S28).