VI announces unlimited data without FUP between 12 AM and 6 AM

Nice to see Vi trying to get back in the game.
Only time will tell how good is the performance at night. If they can provide a respectable speed say 5-10 Mbps, it will be good. Giving cheap speeds like what Jio does (1-2 Mbps) would make it pointless.
I'm also waiting for the answer, but will update tomorrow if my daily data is deducted or not.
I would be already active if you have recharged with eligible plans earlier.
Similer to the weekend rollover.
Confirmed with customer care...

From above link-
Only with ViTM Unlimited Daily Data recharges, starting Rs. 249.

* This benefit is only applicable for recharges done on or after 16th Feb 2021
So existing plans would not able to test it, and their data balance would be used at night.