FREE Airtel 1 GB GPRS Google service Data

This is an old trick(offer) but still working in many states.

first activate 3g then sms SMART PI to 54343. 
Done. 

Wait for maximum 72 hours. 
You will get 2gb or 3gb and 100 video minutes for 60 or 90 days. 
 Must try. 
Offer can be activated only once on an aircel number. 
3g required. 
Thank you.