I have been using Jio from the day its been introduced.
At first I was skeptical about a company providing all facilities for giving free. Later when started to use it things for not that smooth.
Calls were not getting connected, heavy call dropings.
Apps used to crash.
Sometimes there used to no service at all.
Later things started to getting better.
Now we get the network in all possible places where we go. Call dropping is almost nill. Apps are working fine.
The best part is their offers its all ways a surprise.
Definetly a best ISP !