Jio Fiber
Hathway and ACT are good as long as you don't get any issues. Both of their customer service dept are worst. They won't understand the issue, they will just close the ticket raised without resolution.
Airtel - comparatively better CS.
Jio - sometimes CS is fine, many times similar to ACT/Hathway.
Which: bsnl, why: because I say so.
It’s area specific. Try private ones for better service
For you, airtel/jio/act For your worst enemy: hathaway
Depends on the location. Airtel and Jio did not exist in my area till a year ago. My cablewalla gives me 200 Mbps unlimited up and down for 9000 a year.
Airtel is great. Decent price, prompt service and low latency plus free Airtel xstream subscription with longer plans. Jio is better but not available everywhere