Bharti Airtel has approached the Supreme Court over the assessment of adjusted gross revenue (AGR) dues payable by the company. According to the telecom operator, the assessment by the Department of Telecommunications (DoT) has errors. As per DoT’s assessment, Airtel’s total dues stand at Rs 43,980 crore, out of which Rs 25,976 crore is due. Airtel’s calculation, however, shows that its total dues stand at Rs 13,004 crore. The telco has already paid Rs 18,004 crore.