Operating frequency(3G): HSUPA/HSDPA/UMTS 2100MHz Operating frequency(2G): GSM/GPRS/EDGE 850/900/1800/1900MHz Speed: HSUPA 5.76Mbps; HSDPA 7.2Mbps Interface: USB 2.0 high speed Dimensions: 95 mm × 48 mm × 13 mm Weight: 90g Receive Diversity: HSUPA/HSDPA/UMTS 2100MHz Micro SD card slot: Yes (Up to 32GB) Equalizer: Yes WiFi: 802.11.b/g Encryption: WEP, WPA, WPA2 OS: Windows 2000 SP4 / XP SP2 / Vista; Mac OS X 10.4 and 10.5 with latest upgrades; Linux: Ubuntu(7.10/8.04/8.D10), OpenSUSE ( 11