I have been using jio scince it was launched for trial .As it had so much to offer for free, it was able to build a big customer base before it was actually launched.But I think it is not up to mark because the calls keep dropping .And also the internet speed is very low in many areas which is the main problem.But as it was given all for free no one complaint , but now we have to pay for it and still there are problems of call dropping and low internet speed even on 4g.