3g usb modem unlocked Support HSDPA/UMTS 2100MHz GSM/GPRS/EDGE 900/1800MHz USB 2.0 high-speed slot Chipset: Qualcomm MSM6280 SMS Message Data service USSD function(option) Voice call facility(option) Data transmission up to 7.2Mbps (HSDPA) Data transmission up to 384Kbps (UMTS) Data transmission up to 384Kbps (EDGE) High-capacity phone book / SMS box T-flash card;micro SD card slot (up to 8GB) Operating systems Windows2000, Windows XP, Windows 7, Windows Vista, Windows CE, UBUNTU 8.04, Mac os x 10.4. CD box or paper box.