Kolkata SIM boxes seizure ignites fears about major international crime

"We have arrested one Amit Gupta from 16 Swinhoe Lane. Gupta was using three active SIM boxes having 512 slots with 73 active mobile phone SIM cards. He was using the technology to terminate the International Subscriber Dialling (ISD) and Voice over Internet Protocol (VoIP) bypassing international gateways of domestic service providers,"