Visonicom VGM21D411 is a 3.75G modem HSPA+ USB data card UMTS 2100MHz with downlink up to 21Mbps and uplink 5.76Mbps. It also backward supports HSUPA/HSDPA/WCDMA 3.5G/3G network and EDGE/GPRS/GSM 2.75G/2.5G/2G network of 900/1800/1900MHz.The 3G dongle also supports Micro SD Card up to 8GB so that the 3g card can be…