Someone shared this tips and it works so I feel I should share it to using this package.
How Can I Make my Airtel 2GB for N200 or 6GB for N500 Work on 3GB Mode?
Once you’ve subscribed on your sim,simply tether the network to other phone or to PC and use the tethered device to browse and download and you will notice an increased speed.
On the smartphone that contains the 2GB data package, turn on your Mobile hotspot, and tether it to other device, while you connect with your WiFi and the speed will be greatly increased.
That is all, if you have any questions, feel free to ask.