FREE 50 Local & STD Minutes For Airtel Users
https://play.google.com/store/apps/details?id=com.myairtelapp

(Note :- If You are already download this app, then just update the latest Version).
Enter your mobile number & Register your account on MyAirtel App.
Now Open it , Look for “MyDialer” icon make it your Default Dialer pad.
A notification will be Come to your notification bar ‘Manage you calls Manage your calls efficiently, get free calling minutes and enjoy seamless dialing experience’ You have to click on it to read it.
That’s it!! Once the process has complete, Then benefit will be Credited to your airtel number within 24 working hours