Relience jio. It is a sim launched by relience which at first told that it will give unlimited calls and unlimited net for three month. But after some time it said that the unlimited data is now converted to limited. Which is not a good thing. Because it promised to give unlimited.
And talking about its customer servise. It is the worst servise. If you want to call customer care you have to wait for like 30 minutes. And there is no garrenty that they will pick u up. And at its customer care center everything is not systematically . And some times its so called 4g network gives a 2g speed.