New Delhi, Nov. 25 -- TRAI has imposed a penalty on Airtel, BSNL, Reliance Jio and Vodafone Idea. This is in regards to the case where they did not respond appropriately to a show-cause notice that TRAI issued. It was due to failure in block phishing activities on their networks. The other entity that snowballed into the case was Tat teleservices. In June, One97 (Paytm parent company) had moved the Delhi High Court against telcos, TRAI and the Centre for not blocking those who were defrauding its customers by phishing activities over mobile networks.

BSNL has been slapped with the highest fine of Rs.30 crores, according to an affidavit filed by the Trai at the Delhi High Court. Almost 60-70% of the fraudulent messages and phishing attemp...