It is really very easy to activate your Night Pack of Airtel. Follow the below steps in order to activate your Airtel Night Plan:
Dial the USSD code *121# on your phone’s calling app.
Follow the instructions appears and reply with the unlimited night plan options.
Lastly, select any of the Airtel night pack of your choice.
A confirmation message will arrive within a minute, and your SIM will get recharged with your chosen Airtel Night pack from 12 AM to 6 AM.