The jio comapny has provided free internet thats why all people started using jio so the network started decreasing day by day
1) its internet works some time and some time not
2) Internet speend is 1 mbps and upload speed is 2 mbps
3) when you go to underground area the network start to decline calls and internet
4) it can only work in 4g mobile not in 2g or 3g
5) Its calling feature is worst when the net is not working you cant make a call thats the major drawback in the jio sim