I would like to inform you that the most reliable ISP in Bangalore is Airtel broadband. I am using Airtel broadband for 2 years and I have never found the down time regularly. Yes, you can see the down time for 1 hour in a month hardly. .
If you want the net speed around 8 Mbps to 16 Mbps plan(price Rs.1000 to Rs.1800/-), then I can recommend you guys airtel broadband. Its worthy for every penny.