Franklin Wireless CGU-628A 3G GSM Unlocked USB 7.2 Mbps Mobile Broadband Modem Unlocked for any GSM Network in operating frequencies in the operating frequencies Supported for this Modem, with a Broadband data activated sim card. HSDPA/UMTS 850/1900/2100 MHz EDGE/GPRS/GSM 850/900/1800/1900 MHz Compatible with Windows XP/2000/Vista/Windows 7 64 bit and 32 bit MAC OS X / Linux External antenna connector available. Rotation USB connection allows user to connect with ease to laptop or desktop computer Sim card is not included.