Jio is a 4G network started by Relaince.I recnelty bought a JIO sim and I am having a life time experience with it.It gives me free 4G data as well as free call.The network coverage is quite good as well as convienet. I even get uninterrupted coverage at places where other networks dont get.The service of JIO is pretty good the customer support is also good When ever I get any problem I call them and I get instant answers and the problem is solved very quickly.Since JIO is free I dont get charged anything and I enjoy all things for free as well as I can download free apps from the JIO App store.So I would recommended each and everyone to buy JIO as it free of cost and in future you will enjoy its service when it is paid