Reliance Jio Chairman Mukesh Ambani has repeated the History:

Reliance Industry was started by selling budget phones with smart features and makes it affordable for common man in which a black and white screen budget phone can also run live tv movies etc. in it.
And after so many years Reliance Industries Chairman Mr. Mukesh Dhirubhai Ambani , Makes A Massive Change in Indian telecom industry by Launching JIO. And now Jio was the topnotch telecom service provider in india in just 1 year. That was the power or Mr. Mukesh Dhirubhai Ambani, and now again a New JIO PHONE is the another gift which reliance was going to give all of Indians in which the phone is almost FREE yes you heared it right its FREE. You only have to spend 1500 Rupees for the phone which have all the Jio apps and Jio features in a budget segment phone. You can give it back to Jio Care and get your 1500 rupees back within 5 years, thats awesome. And you only have to do that choose a Plan and recharge for it and use your Jio phone as long as you want.
So, i my opinion Jio Phone is the killer idea for the budget phone user. Go to your nearest Jio Care and booked it as long as the stock will end.