This trick works for all Airtel numbers and call
can
only be made to airtel number only.
Now dial these codes accordingly
*337#
*700#
*700*1#
*700*2#
You will see something like this after dialing
those
codes: Dear customer, you still have 100 free
minutes.
HOW TO USE THE FREE CREDIT TO CALL?
Dial *337*2* airtel phone number# to use your
free
minutes.
Enjoy and don’t forget to share on your timeline
for
others to get it.