I am sourav mishra and I am going to share my own experience.
So let's start now I used reliance Jio sim.
Jio sim have a great speed in delhi areas but in village areas reliance jio sim not have very good
You can say that bad speed and in voice calling voice is not fresh.
Voice quality is bad. When I was calling in reliance jio sim I can't hear voice of my friend or someone else.
I can't says that reliance Jio sim have network everywhere in India. In sector this woeks well.
But in village areas this not works well.
So thankyou friends good bye and have a nice day