... Quad-band GSM/GPRS 850/900/1800/1900Mhz frequency.M10 chipset support Wavecom and Simens open AT,TCP/IP ... gatewayMain functionBulk sms +landline call +IMEI changingFrequency850/900/1800/1900MHzSystem supportWindows7,Vista,XP,2003/2000,Linux,Mac...OS. ... gatewayMain functionBulk sms +landline call +IMEI changingFrequency850/900/1800/1900MHzSystem supportWindows7,Vista,XP,2003/2000,Linux,Mac...OS. ...