16 Port,Quad-band,support 64 sim cards,IMEI number is changable,Supoort bulk voice call & ... bulk SMS,SMS software in set,plug play Hotspot Gateway,16 Ports 64 SIM Cards GSM FWT Gateway,GSM Gateway Call Termination. The interfaceboard of this device is ... PC or Laptop16 Port , 4 Sim Cards Slots in every port:Working enviroment Fixed Wireless Terminal 16 Port with 64 sim cards Quad-band GSM/GPRS FWT