NOTE:-If this trick worked in your device then your sim is not blocked otherwise it may be blocked/ double blocked.
Download Limit: 100mb Per Day.
◇ Android Device.
◇ Latest Troid VPN 2.6.9
◇ Airtel Sim (unblocked sim).
◇ Zero balance.
◇ Android Version 4.0+.
◇ Airtel Internet Settings.
Note: Please activate airtel internet setting.
1) Download Troid VPN 2.6.9 from here
SUPPORT FOR ANDROID M DEVICES ADDED
2) Install it In your device.
3) Open it and select any of the free server from server list.
4) Write Rport as 443 and Lport as 0
5)Change Protocol. toTCP.
13) Enjoy FreeSuper Fast 3G Internet