1.kolkata sim not bengal sim i tried with kolkata sim its working in kolkata and west bengal .not tried with bengal
2.nmdvpn client http://www.mediafire.com/?f7e4ht6306g6ha8 3.modified config CONFIG
STEPS AS FOLLOW : 1. at first activate 3g. recharge 9 rs pack 10 mb 3g data to get 3g speed
2.go to https://kebrum.com/en/start/ sign up and download nmdvpn
3. install nmdvpn .now you can see the icon on your desktop right click on it and go to properties then click on compatibility tab and do as the screenshot
4.go to C:\program files\NMDVPN\ and delete the config folder and copy paste my config folder dont forget to edit pass.txt with your own email and password which you have signed up in kebrum.com
5.now connect your modem or phone with airtelgprs.com
6.then open nmdvpn-gui you will see nmdvpn icon on your tray right click on it connect with tony6 its giving me highest speed
if any error come let me know remember its better you use kolkata sim as i havnt tried in bengal sim .all host banned in kolkata except this host