... MSM6280 2. Windows2000, Windows XP, Windows Vista, Win7... 4g usb wireless modem 1901C-21M Model No: 1901C-21M Product Description1)Network Technology ... : HSPA+, HSUPA, HSDPA, HSPA, UMTS, EDGE, GPRS, GSM 2)Frequency ... Bands: WCDMA 850/1900/2100/MHz, EDGE/GPRS/GSM 850/900/1800/1900 MHz 3)Antenna Diversity Support ...