Free Airtel mb,grab it while it still stand

How to get it
Step 1
>Dial *317#
If you get the message "APPLICATION DOWN", keep trying
Step 2
>If you get the message  "successful........",Dial *688 *1#
There you go you have just received 1GB lasting for 25 days
Step 3
To check your data balance or to confirm, dial *140#
Grab this offer while it still stand before it blocked
Continue to dial *688 *1# as many times as you want