Features: 1) High-quality voice calls with 8kbps EVRC 2) SMS / phone book / caller ID display 3) Indoor / outdoor antenna optional 4) Supports R-UIM and ROM-SIM mode 5) Circuit data service: up to 9.6 / 14.4kbps 6) Packet data service: up to 153.6kbps 7) PC fax 8) Backup battery 9) Emergency calls 10) Caller ID display, call transfer, call forwarding, call waiting 11) Call holding and three-way talking 12) Support DTMF and two-stage dialing 13) Volume adjustable