This is a GSM wireless twin sim phone which operates just like an ordinary mobile phone and is compatible with all networks.It has an FM radio calendar sms features and alarm.-Support GSM 850/900/1800/1900Mhz dual sim cards-Caller ID-Dot-matrixed display-Multi-languages selection &customized,spanish,english,chinese.arabic,russian etc-SMS function-IPNo. setting-Call in/callout/call divert/call waiting/three way conference call-lock up function:keypad,SIM card,network-Local No./direct No./limited No.setting-Speed dialing-Redial button-Calendar, Alarm and clock-Rechargeable backup battery-Ringer volume adjustableFeatures:1. Support GSM850/900/1800/1900Mhz2. Caller ID3. Dot-matrixed display with Spanish,English, Chinese, optional4. SMS function5. IP No. Setting6. Software upgrade jack7. Data service, Support CSD and GPRS class 10/8. Connect PCby USB port8. Call in / Call out /Call divert/ Call waiting limitation function9. Lock up function: SIM card, network, cell and operatedcompany10. Local No. / direct No. / limited No. Setting11. Speed dial function12. Redial function13. Support three-way conference call14. Save more than 100 SMS on the phone15. 7-level headphone volume and silence adjustable16. Speaker Phone17. Low-power indicator18. Storage 20 missed call or received calls and the last tendialed number19. Voice mail function