Jio is a company of Mukesh ambani and it provide me a fantastic speed on many place but in some place s its speed is very slow. That was a big factor with that this sim give a good speed of around 3mb PS but still this company need some improvement in their network capability.they are providing cheapest data and life time voice calls and message to anyone they are doing such a very unbeliable job to me .by their this method some poor people also get godspeed of data at good rates. They all are also providing net speed to all the people of the villages by making towers on many villages but due to more people buy this its speed become slow and stidy