1. A method for retrieving a phone number stored in a mobile terminal, the method comprising: displaying a first letter of identification names in a phone number retrieval mode, wherein each identification name corresponds to a phone number stored in the mobile terminal; selecting one of the displayed first letters; extracting a second letter next to the selected first letter from the identification names having the selected first letter; extracting at least one search keyword consisting of the selected first letter as the first letter of the search keyword and the extracted second letter as the second letter of the search keyword; and displaying the at least one extracted search keyword and the identification names corresponding to the at least one extracted search keyword.