3G UMTS GSM HSUPA USB Dongle Support HSUPA / UMTS 850/ 1900MHz (optional) or 850/ 2100MHz (optional) or 900/ 2100MHz (optional) GSM / GPRS / EDGE 850 / 900 / 1800 / 1900MHz USB 2.0 high-speed slot Chipset:Qualcomm MSM 6290. SMS Message Data service USSD function(option) Voice call facility(option) Downlink speed up to 7.2Mbps (HSDPA) Uplink speed up to 5.76Mbps (HSUPA) High-capacity phone book / SMS box T-flash card:micro SD card slot (up to 32GB) 3 colors LED indicator Operating systems Windows2000,Windows XP, Windows 7,Windows Vista, Windows CE,UBUNTU 8.04 or later, Mac os x 10.4 or later. CD box.