... SMS Machine sometimes.With different module inside,it supports dual-band,tri-band,quad-band network.Q24plus is sidly used in Canada,south america ... /GPRS/CDMA Modem2.Based on Wavecom or Siemens Module,dual band 900/1800Mhz,tri-band 850/1800/1900Mhz or 900/1800/1900Mhz.quad ... -band 850/900/1800/1900Mhz with TCP/IP,OPEN AT. 3. ...