Yes can vouch. 200mbps plan + static IP, still getting 1gbps.So @napstersquest gave me the idea and I tested it my self.
He's from another state so I guess it's verified.
First was the Sercomm router, then the Nokia router. Got gigabit with both.
My plan is the 1099 rental (plus 199 for static IP) for Airtel Black. DTH + 200mbps fiber.
The thing is they most likely give you a dual band router for speeds like 200mbps and above, and the GPON unit they provide generally has at least one gigabit port.What is important is that you should have the router which is capable of 1gbps. If you take a plan which is 300mbps or less, you get a router capable of just 300mbps and all fails. So start with a connection which is more than 300mbps and then migrate back to something less. Airtel black gives first month free so don't worry and go for the Rs.3999 plan.
So you can ask them to set it up in bridge mode (which they do without much hassle when you have static IP - if you have the Sercomm router you can even do it yourself) and use a router of your choice.
I did face some issues, I have shared them here: https://techenclave.com/threads/need-help-in-port-forwarding-airtel-xstream-with-static-ip.206808/
But overall Airtel seems to be the best so far (I have tried Siliconcare (local), jiofiber, Hathway and Gazon).
And for the price, I am definitely getting an insane deal.
Currently, I have the Nokia G2425A router in the hallway of a 3BHK flat, and an Archer C80 connected via CAT5E, located in my bedroom( acting as an access point).
3-6 mobile phones and 1 laptop, 1 desktop connected directly to Nokia's wireless access point,
1 raspberry pi 4 connected via ethernet to Nokia router,
1 server, 1 laptop, Xbox, LG TV connected via ethernet to Archer C80,
and 2 phones and 1 laptop connected to Archer C80's access point.
I have no issues getting near gigabit speeds on torrents on the server or on the PC, and as long as I am in good range, the LAN transfers are almost always gigabit no matter which AP I am connected to.
This test was run on my gaming PC:
And this is on my OP Nord 2 connected to Archer C80 (about 8-10 feet away)