1）Backs-up and restores phonebook data from SIM card. 2) Memory: 16KB-500 telephone records. (2 different SIM Cards data Storage) 3) Password lock & phonebook viewing 4) Calendar display 5) Support data exchange among different SIM cards 6) Easy to operate, user-friendly operation interface supported 7) The Data can be saved in the device more than 3 years, even if out of the electricity. 8) The device is accordance with ISO/IEC 7816-3, GSM11.11 and GSM 11.12 standard; it can support 3V SIM card and R-UIM card.