If you are an Airtel DTH customer then using Missed Call service and SMS Service you can know your Airtel DTH Balance all you need to do is just give the missed call from your Airtel DTH Registered mobile number.
See below How to Check Airtel DTH Balance by using Missed Call and SMS Service.
Airtel DTH Balance
Airtel DTH Balance Missed Call Number
Dial and Give a missed call to 81300-81300 to know Airtel DTH Balance.
Upon giving missed call after 1-2 rings call disconnects and you will receive an SMS from Airtel.
Using Airtel DTH Balance Missed Call Number Service is free of Charge.
Airtel DTH Balance by SMS
Send a SMS in below format to 54325 from your Registered Mobile Number.
Format: BAL and send sms to 54325
Note: You can also check the Balance of Airtel DTH on Airtel Thanks App, Go To Services page Section, then DTH account and See the balance.