How can you make a free call from airtel to airtel?

To make a free call from Airtel to Airtel, you can use the Airtel app, which often provides free calling options among its users, especially during promotional periods. Additionally, you can check if you have a valid plan or offer that includes free Airtel-to-Airtel calls. Another option is to use internet-based services like WhatsApp or other VoIP apps, allowing you to call for free as long as you have a Wi-Fi or mobile data connection.