Dinstar Multi-SIM VoIP GSM/3G/4G Gateway adopts the cutting-edge Multi-SIM technology, 4 SIM slots per 1 GSM/3G/4G channel, enables the easily transit between mobile and VoIP networks. It is an easy-to-deploy and cost-effective solution for organisations, service providers, and bulk SMS services since it combines the functions of GSM/3G/4G gateway and built-in SIMBank.