Abstract: A method and system to allowing a user to maintain the privacy of his or her telephone number. The method and system provide a way in which another party may transmit data to the mobile telephone of the user without knowing the phone number associated with the destination mobile telephone. In addition, the method and system provide a way for the user to transmit data from his or her mobile telephone without revealing the phone number associated with the mobile telephone.

Abstract: A apparatus and method for contact expiration management that includes identifying a contact as temporary, setting an expiration date for the temporary contact, and removing the temporary contact on the expiration date. The apparatus may be a mobile device such as a mobile phone. A user of the mobile device may respond to a prompt and select removing the temporary contacts or the temporary contacts may be removed automatically. A cleanup routine operating on the mobile device monitors time stamps on contacts and expiration dates of contacts to determine when a contact might be removed.