1. Backup and restore the phone book data saved in SIM card; 2. Capacity 32KB, can save 4 cards, totally 1000 groups phonebook; 3. Read names and numbers saved in device directly; 4. Password setup function; 5. Relieving PIN code function; 6. Can set up company logo display when device is switched on; 7. Single operation, no need to be connected with PC; 8. Without phone book data lost when mobile phone loses; 9. Even power exhausts, it will not lose the information stored in it.