Here is procedure to hack Rs 99 gprs plan and get 2.5 GB data free for 30 days
Make sure your account balance is low , in case of failure
First go to this link
http://rcom.co.in/rcom/rworld/music/mobileCallerUser_screen1.jsp?plan=postMobileNet
Submit your Name and mobile no. (enter mobile no. starting with 0)
you will receive a pin via sms on your mobile
Activate your plan using this link
http://rcom.co.in/rcom/rworld/music/MobileAuthentication.jsp?AppID=109&plan=postMobileNet%2099
Enter your mobile no. and pin, its done. you will receive a successful activation message of your Gprs plan
Now you can enjoy free internet surfing and downloading on your mobile and PC
