Jio Air fiber is now available in India

Expensive hai, fully rollout hone do.

great offering. lets see how airtel stands against this.

I'm already enjoying Airtel Fiber 40Mbps at 600 including taxes

It's not good at all for me. I use local broadband. No fancy apps or OTT is provided by them on my plan (higher plans do provide OTT like SonyLiv/Disney+). If I take 6 months plan, I get the rate at effectively ₹347/month with 40 Mbps speed. 

Downtimes are maybe once or twice in a month that too for minutes. Using for the past 4 years. This Jio one costs double for 10 mbps less speed. The OTT bundles are good but in DD we find OTT subscriptions at very less prices if we buy from Dimers. Don't know why they made OTT compulsory.

What is the difference between using air fiber and  5G sim.

I think their 599 postpaid plan as speed will be much more for unlimited data..is a better option...and for ott...u can get what u want easily in less price rather than getting ones which u don't require....or there is Kodi for TV or laptops

My mobile phone gives 200mbps speed and that too I only pay 395 for 84 days.

As long as they have unlimited 5g for current plans this is not needed.

Does this require external antenna installation or its fully portable like the Airtel device? 100 mbps plan is Rs.100 more than Airtel. But Airtel has launched only in delhi & mumbai.

There should a plan without the add-on channels etc, just pure internet. 

Incidentally, at my location TPlink MR600 gives avr 40 mbps+ with Jio SIM on on 2CA LTE.

This is game changing for rural areas. My in law house is in village , no fiber could possibly reach there. But recently I started getting 5g network in my phone so now they can install wifi for smart tv.

Jio Airber and fiber ott plans are same.. But they should've included non ott plans... Maybe launch later i guess