I have BSNL Broadband (Fibre-Optik) which is very stable, fast and good. I get 150 GB free data a month which is sufficient for me. The speed is 40-50 Mbps as per ookhla speed test. I had earlier tried Airtel. Even though the speed was good, after a week or ten days of using you get the message that you have exhausted all the data and must upgrade by paying additional amount to continue at the same speed. If you don't do this, you had it!