Customizing Your Phone872. Tap the On radio box in the Key Tone field.3. Tap the Save soft key to accept the change or to cancel.Contact ManagementThis section provides the operating instructions for managing contacts. Topics include: Local Directory Blacklist Remote Phone Book Mobile ContactsLocal DirectoryThe built-in phone directory can store the names and phone numbers of your contacts. You canstore up to 1000 contacts and 48 groups in your phone's local directory. You can add newgroups and contacts, edit, delete or search for a contact, or simply dial a contact number fromthe local directory.