Hello,Its a system app.You can't delete it without root or a PC. Also If you have a PC and know how to use ADB commands then you can uninstall it without root access.
Please be informed that the app is automatically get generated when you insert any SIM in the device and it can not be uninstalled. However, it is a default app.
To uninstalled the Airtel application kindly once coordinate with the Airtel network service provider.
Team Samsung Members