A great step by reliance to give unlimited calling, sms and Internet till 31st December. I feel even after the free offer ends its the cheapest compared to other networks. But, the problem for now is that the speed is very low during the day. Its only good at odd times when majority of the people are sleeping and the data traffic is low. Most of the time it’s speed is even not as much as 3G. The other problem is the voice quality. Most of the time, when talking to a person who uses some other moblie network, the voice quality is very poor and not even audible sometimes. Also, to keep incoming calls and outgoing calls activated one has to keep the moblie data necessarily onn which consumers too much of battery. Another problem is with the calling app of jio. We can only call using the jio 4G voice app in which auto - recording is not possible. These are the setbacks of using the jio sim. But because we are getting these things for free now I would recommend it. Though I don’t think you should continue using it after the free welcome offer ends!