Dial `*121#` from your Airtel number
Select the option for data balance or internet balance
Check the balance details shown on the screen
Use the Airtel Thanks app to view your net balance
Open the app and log in with your Airtel number
Go to the account or usage section
Send an SMS with `DATA BAL` to Airtel customer care if supported in your region
Call Airtel customer care and ask for your data balance
Check your balance through the Airtel website or self-care portal