Yes you hear it right now just send a sms and get 500 mb 3G data free on your mobile. if you are a Tata Docomo user then you can get free 500 mb data just by sending one sms.
How to get free data:
1.Just send a sms from your mobile ANDROID to 54321.
2.Soon after sending sms from your mobile you will get confirmation sms and free 500mb data with in 48 hours.