Act and Airtel are some good options.
ACT service is excellent. I am using ACT Fibernet at home, the internet is never dropped and I am very happy with the service. With this experience I recommended ACT.
Go for Hathway! Can recommend it from personal experience.
I’ve been using ACT for years and it gives the best speed. Plus, the customer service is satisfactory too.
Using Airtel, they call a lot so the connection is good I'd say..+ they compromise on the charges if you push them a little
Airtel provides better services other than any company in India. Specially in Delhi!
Act is the most reliable and reasonable then Airtel.