You need a GSM Core Network[1]. For more details, you can take a look at HLR and AuC components which are responsible for authentication. [1] https://en.wikipe

You need a GSM Core Network[1]. For more details, you can take a look at HLR and AuC components which are responsible for authentication. [1] https://en.wikipedia.org/wiki/Network_switching_subsystem#Authentication_center_.28AuC.29 https://en.wikipedia.org/wiki/Network_switching_subsystem#Au...