Add a new contact to the SIM card. The name of the contact. The phone number of the contact. The index of the new contact. Delete a contact from the SIM card. The index of the contact. Retrieve a contact from the SIM card. The index of the contact. The contact structure containing index, name, and number. List all contacts on the SIM card. The list of contacts where each contact has an index, name, and number. Find a contact from the SIM card. The pattern to search for. The list of matching contacts where a contact has an index, name, and number. Get the number of contacts stored on the SIM card. The number of contacts.