As you already knew that jio give unlimited data and calling.
Here are some points that I want to share with you : -
The best thing about jio is that they give unlimited data and calling which do not give money operators as of now.
I know that the network coverage is not that great in villages but the internet is working in some slow speed but the fact is that you use internet without not pay anything.
Mukesh ambani takes intiative with jio to make india digital and connect worldwide from all locations.
Network coverage is good in city but poor in villages.
Customer service is very poor like kachra.