Open the Contacts application.
Touch the contact entry to which you want to add information. The contact name for this entry will remain unchanged after you join with another contact.
Touch the Menu Key > Edit contact .
Touch the Menu Key > Join .
Touch the contact whose information you want to join with the first contact. The information from the two contacts will be merged and displayed under the name from the first contact.
Touch Save to confirm you want to join the entries. The contact information will be displayed in one contact entry.