Free 3G 3GB Internet Data - Tata Docomo (march 2012)

Get 3GB Internet Data for Free in Tata Docomo, itz just a simple trick & works greatly !! 
this trick is posted at other website , & itz working for me , so i shared this with you guys , Enjoy &
try it and replay here

sms 'SMART' to 52121
thn wait fr 48 hrs
Offer Valid For This Models:
Nokia: E6,C6-01,c3-01,c5,c6-00
Samsung: Champ 3.5G,Primo, Galaxy S 4GB,Wave II,Monte
Sony Ericson:Xperia™ arc S,X10, X8, X10 Minipro
HTC : Wildfire S,ChaCha,MOzart
and check data
by dialing this check ur data by dialing*111*1#