PayTM is a popular online digital platform allows the customers to buy any product and to pay BSNL bills directly, so you can complete BSNL bill payment for postpaid mobile, landline, using credit card and other services quickly from PayTM home page in online or through mobile application. Bharat Sanchar Nigam Limited has allowed PayTM
source https://99-networks.com/paytm-bsnl-bill-payment-promo-code-offers/