E1550 USB Modem run with speed: 7.2 Mbps downlink and 2 Mbps uplink.This E173S also supports Micro SD < up to 32GB>

E11550 USB Modem run with speed: 7.2 Mbps downlink and 2 Mbps uplink.This E220 also supports Micro SD < up to 32GB> which can help you to keep more things,meanwhile can act as a USB memory device also

Specification:

Type: modem USBFrequency (3G): UMTS/HSDPA/HSUPA 2100 MHz lub 2100/1900/850 MHzFrequency (2G): GSM/GPRS/EDGE 850/900/1800/1900 MHzSpeed: 7.2 Mbps downlink, 2 Mbps uplinkInterface: USB 2.0 High SpeedFeatures: 71×26×12,5 mmWeight: 30 gReceive Diversity: NoMicro SD slot: yes (up to 32 GB)Equalizer: YesCompatible with Windows 2000 SP4/XP SP3/Vista SP2/Vista/7; Mac OS X 10.4, 10.5, 10.6; Linux: Ubuntu 8.10/9.04/7.10, openSuse 11.1/11.0/10.3, Fedora 10/9/7, Debian 5.0/4.0, Xandros 4.2, Linpus 1.0.15E, Mandriva 2009.1/2008.1, Red Flag 7.0/6.0

Huawei E220 USB modem 3.6Mbps