If you are looking for a broadband connection, airtel should be your choice, Although plans are a bit expensive compared to Hathway and BSNL/MTNL, the service is more than superior and the ISP support is great.
The connection reliability is more than enough and you will not face any issue with the network. Even in case you face an issue, be assured that your issue will be resolved in next 24 hours. I have been using it for past 1 year and till dat I have not faced any issue in terms of the broadband speed and connection. Prior to that I was using hathway and had a bitter experience with that so I switched to airtel and I am having happier times.
The subscription process is also quite simple and if you have all the documents, the connection will be done in max 3 business days. This is go for it network for your home or business.