I got a jio sim from reliance free preview offer.the company provide a awesome and attractive offer with the reliance jio sim. in this network I got free voice call to any network for 3 month, its great, . and also I got unlimited data pack for 3 month, ohh its awesome na. and the speed of the data is 2 to 5 mbps, yes really.i like this service provider very much.guys please used this network once and you also loved this network.