I had taken 4G wifi dongle with 2GB unlimited plan and they were fine for the 3 months with billing. Last month the bill was 1110 when asked how this increased they said it is a mistake and it will be rectified, pay only the amount as last month.
This month again the bill was 1110 they have come up again it will be more as I have used more data! since it is 2GB unlimited the seed should come down as after 2GB limit and I should not be charged.
Be careful this is repeated problem with Airtel as I understand with couple of my friends also. Please don’t trust double check the bills before you play.