Open your phone’s messaging app
Create a new SMS
Type `DATA` or `BAL`
Send it to `121`
Wait for Airtel’s reply with your data balance
If that does not work, send `STATUS` to `121`
Check the SMS response for your remaining data balance and validity
Open your phone’s messaging app
Create a new SMS
Type `DATA` or `BAL`
Send it to `121`
Wait for Airtel’s reply with your data balance
If that does not work, send `STATUS` to `121`
Check the SMS response for your remaining data balance and validity