The present invention is a method of managing missed calls providing a calling party, who initiates a call that is not pick-up by a called party (i.e., intended recipient), the autonomy to retain or delete telephone number of calling party in phone registered on the called party phone as caller identification (ID) through a mobile service provider (MSP) of a telecommunications network. The method may be implemented as part of a telecommunication system or as part of a computer program. Also, provided is a method and system for calling party to create annotation in a mobile service provider system parenthetical information for called party to retrieve or to alert called party.