I have been using Jio 4g voice services since past 1 month and I have to say it is working pretty good. in the middle of the time some of the users experienced some network related issues. but now it is working fine.
One of the coolest ideas to provide free internet services to the people till 31st December 2016. After that the charges are extremely affordable. so its a great deal.
I definitely recommend this product. Go JIO 4g.