By Karthik , 19 May 2012 TRAI: Most consumer complaints in 2011-12 against Airtel India Today reports that TRAI data indicates that the highest number of consumer complaints were registered against Bharti Airtel in 2011-2012. This information was presented in Parliament by the Minister of State for IT, Milind Deora. Tags Airtel TRAI milind deora parliament complaint