The Anti-Terror Cell (ATC) of the Bengaluru Police probing the operation of illegal telephone exchange along with the Military Intelligence has so far unearthed 109 SIM box devices comprising 3,000 SIM cards, Police said on June 14, reports ET Telicom. The Bengaluru police had earlier said that its anti- terror cell coordinated with the Military Intelligence and unearthed six illegal telephone exchanges where 30 SIM boxes with 960 SIM cards were used.The gang used to convert the international phone calls to local phone calls using the Voice Over Internet Protocol (VoIP) causing financial losses to the Department of Telecommunication besides posing a security threat to the country, Police said.Since most of the calls originated from the Middle East, the payments were made there.