I am using reliance jio sim for last 2-3months.
Relaince jio is giving us free internet that is a good point l. But it is totally useless, because its speed is not of 4G. It also gave me speed of 400-2000kbps. It never accross the speed of 2 mbps. Which is really poor as 4g speed. And they say about free calling but that is totally an eyewash.
When you try to make any call on any opreator. It alwways say root ki sabhi line veast hain. Means that opreator is rejecting your calls. There are huge line outside there outlets, but when they used it. They came to know that it is not good