CBI may file chargesheet against Bharti, Vodafone Livemint The Central Bureau of Investigation (CBI), which is probing multiple cases related to the allocation of telecom spectrum, plans to file a chargesheet against Bharti Airtel Ltd., and Vodafone India Ltd., as early as next month, two senior agency officials said. "We are about to complete our investigation in the Bharti and Vodafone cases relating to alleged irregularities in allocation of additional 2G spectrum to these companies during former telecom minister Pramod Mahajan's tenure (in the Bharatiya Janata Party-led government between 2001 and 2003)," one of the officials said. Bharti and Vodafone declined to comment.