Reliance Jio feature phone was unveiled on today (Friday 21st July 2017) is seems to be a bridge between the smartphones and feature phone, Interestingly on paper data is unlimited but actually 512 MB of data can be used with high-speed and after that 128 KBPS speed of internet will be given, hence it is type of unlimited data policy.
With Rs. 1500 which will be refunded after three years, It is best and cheap 4G offering till now. Most probably there will be postpaid plans as well with this feature phone after span of time.
Also there is no Whatsapp support within the phone, but in future it may come.
Update : Recently Facebook app is available for the phone.
Stay tuned for more updates about Reliance Jio.