A mobile communication device, comprising: a display unit; a memory configured for storing a plurality of phone numbers in an address book; and a controller configured for controlling: the display unit to display a call list including incoming or outgoing call entries corresponding to a plurality of phone numbers, wherein each one of the plurality of phone numbers is associated with a displayed phone number item, the display unit to display, in response to a user selection of an incoming or outgoing call entry of the call list, the phone number item together with all detailed incoming/outgoing call information for the phone number, the controller configured to determine whether the phone number of the displayed phone number item is one of the plurality of phone numbers stored in the address book, and the controller further configured for controlling: the display unit to display a phone number-related menu on the display unit in response to a user request for displaying the phone number-related menu for the displayed phone number item, wherein the displayed phone number-related menu includes either a first address book option or a second address book option, wherein the first address book option of the phone number-related menu is an address book edit option and is displayed if the controller determines that the phone number of the displayed phone number item is one of the plurality of phone numbers stored in the address book, and wherein the second address book option of the phone number-related menu is an address book register option and is displayed if the controller determines that the phone number of the displayed phone number item is different from each of the plurality of phone numbers stored in the address book. a display unit; a memory configured for storing a plurality of phone numbers in an address book; and a controller configured for controlling: the display unit to display a call list including incoming or outgoing call entries corresponding to a plurality of phone numbers, wherein each one of the plurality of phone numbers is associated with a displayed phone number item, the display unit to display, in response to a user selection of an incoming or outgoing call entry of the call list, the phone number item together with all detailed incoming/outgoing call information for the phone number, the display unit to display a phone number-related menu on the display unit in response to a user request for displaying the phone number-related menu for the displayed phone number item, wherein the displayed phone number-related menu includes either a first address book option or a second address book option, wherein the first address book option of the phone number-related menu is an address book edit option and is displayed if the controller determines that the phone number of the displayed phone number item is one of the plurality of phone numbers stored in the address book, and wherein the second address book option of the phone number-related menu is an address book register option and is displayed if the controller determines that the phone number of the displayed phone number item is different from each of the plurality of phone numbers stored in the address book.