The Central Bureau of Investigation registered a case on 22 February 2013 against Bharti Airtel Ltd and Tata Communications Ltd, the giant telecom companies for having link up with the Singapore Telecom for the purpose of international calls, thereby violating norms of Department of Telecom (DoT).
CBI on 24 February 2013 announced that the two companies were charged for causing a loss of around 48 crore Rupees to the Union Government of India since 2004 because of illegal arrangement. CBI filed an FIR in the local court in Delhi after complaints of Communications and IT Ministry.
CBI accused these operators on charges of cheating and criminal conspiracy. Actually, Bharti Airtel Ltd and Tata Communications Ltd had entered into an agreement with the Singapore Telecom for the purpose of international calls, which violates the norms that are laid down by the Department of Telecommunications.