USB HSUPA Modem 1. WCDMA: 2100MHz 2. HSUPA: 5.76Mpbs HSDPA: 7.2Mpbs 3. Voice Call, SMS, Phone Book,USSD 3G HSUPA ModemNetworkFrequency Support (GSM): 850/900 ... BookVoice CallUSSD ChargeTrafffic statisticsOS SupportedWindows 2000, XP, Vista 32/64, Windows 7Mac OS, LinuxMemoryMicro SD card slot: Support up to 32GPC ...