Shares of Bharti Airtel fell by 2.97 per cent to settle at Rs 406.80 on the BSE.
Similarly, Idea Cellular lost 2.29 per cent to Rs 187.75.
"Telecom majors Airtel and Idea corrected after TRAI reduced the ceiling on national roaming tariffs from May 1," said Rakesh Goyal, Senior Vice President of Bonanza Portfolio.
"TRAI has reduced ceiling tariffs for national roaming calls and SMS and has mandated telecom service providers to offer a special roaming tariff plan. These changes will come into effect from May 1," it said in a statement.