... about the sms modem,we have four itmes,different item different function and of course different price,we have wavecom modem with Q2303 ... ,Q2403,Q2406,Q24Plus. Q2303 support sms.900/1800MHZ Q2403 support sms and mms.900/1800MHZ ... protocol.900/1800MHZ Q24plus suport sms,mms and EDGE.850/900/1800/1900MHZ 8 port modem pool detailed product description: Products ...