About the SIM card phone book
If your wireless service provider has set up your SIM card with a SIM card phone book, you can use the SIM card phone book to access contacts
that you have added to your SIM card. The SIM card phone book is different from the contact list on your BlackBerry® device. If you switch SIM
cards, the contacts in the SIM card phone book change.
You can add ADN entries to your SIM card phone book. You can also search for ADN entries or SDN entries. ADN entries appear in plain text
and SDN entries appear in bold.