What is Backout days - These days are the special days on year where lot of mobile phone users send text messages and make voice calls to wish their closest people, so telcos take full advantage of these days by charging them the standard rates.
In starting of 2020, BSNL officially announced that there will be no Blackout days on its network in 2020, as they do in 2019. In 2019, Reliance JIO is the first telecom operator who does not have any Blackout days. Gradually Airtel, Vodafone-Idea, BSNL also follow this in 2019.
In 2020, Bharti Airtel and Vodafone Idea yet to announce the same. Also since BSNL till not arrange 4G networks in India, BSNL does not increase tariff plans to complete private telcos.