pact and light-weight; 2.Easy to operate and very cost effective; 3.Backs-up and restores phonebook data from SIM card; 4.Memory:8KB(250 phone records storage); 5.Supports data exchange amongst different SIM cards; 6.Device independent,No PC or PDA required. We have 25 kinds of SIM card backup device with the price range from USD0.88/PC to USD6.2/PC. For more, please contact with me by MSN