I am a jio customer using it since past few months. I am using it in iphone 5c, but really a disspointing thing that I can use it only for internet not for call, as iphone 5c has no volte.
There is an application called Jio 4g voice, which can be used if someone has 4g but no volte. But there is no such application for iphone( IOS) . It is only for Android.
However recently this application has been developed for iphone( IOS) but it is only for few cities. But hope they will enhance it like android application one.
Its internet speed was not good earlier but it is now good. There are bunch of application like jio tv, jio movies, jio music etc. which are really helpful.
Now jio has lunched few good plans, which we can use from 1st march 2017.
Thank you