The Reliance Jio is the Indian first LTE only network don’t uses have 2G or 3G network not uses. Telecoms are now publishing hard for their 4G service. At the lunched time Mukesh Ambani that user have to pay only for data. However your smartphone should have support for the VOLTE and normal 4G LTE phones are not eligible for voice call and mobile data should be turned on all time to make voice call. Reliance JIo offers free roaming nation wide. All you need to do is just pay for data. The tariff plans of the service all so includes unlimited service and calls and mobile data service. I am using in the one year of the jio network.