I’ve bought my self a Jio sim just for the sake of free call but after a couple of days when ever I want to call its like all the lines are busy please try after sometime. I face this problem every night. And coming to 4g. The network I get is pretty good but from past 6 days im not getting that fast bet which I used to get at the starting when I brought my self a new sim the speed of the net became pretty slow. I’ve heard many people are facing problems with their phone after placing a Jio sim in it. I’m also facing a problem that is every morning I wake up my phone says your phone is not able to detect your sim. So these are the problems im facing with my Jio sim so I suggest people not to take a Jio sim if they have a new phone with you because it may ruin your device.