GSM frequency: 850/ 900/ 1800/ 1900MHZ UMTS frequency: 2100MHz or 850/ 2100MHz or 850/ 1900MHz ( HSDPA/ WCDMA/ EDGE/ GPRS/ GSM) HSDPA : downlink 7.2Mbps, uplink 384Kbps. Built in antenna, three colored indicator, Plug & Play, auto installation software. operating system: Windows 2000/ XP/ VISTA/ WIN7( 32/ 64bit) ; MAC OS product feature: built in high sensitive antenna, Plug & Play, auto startup, no CD required, support TF card.