Reliance jio is giving the welcome offer and preview offer for free but the service of the operator is not that great, it has low internet speed sometime it can’t open Google. But the average speed is like 100KBps around. Well I have used the reliance 3g which is even faster then the jio 4g. Although it is giving the 1GB data at 51 but if the speed is like this then it would be a problem for jio.