Frequency HSDPA /UMTS850/1900, 2100MHZ / EDGE / GPRS / GSM 900 / 850/1800 / 1900MHZ;Transmission (Maximum data rate);UMTS 2Mbps Uplink;HSDPA 7.2Mbps Downlink;Plug & Play (Auto installation);Micro-SD slot (Expandable up to 32GB,use as memory stick);OS:Win 2000/XP, Vista, Windows CE,Linux(Mandriva, Fedora and so on), Mac OSX will be supported