Jio4gVoice is now available on itunes app store launched on 15th Feb2016. Current version is available only for iphones not ipad.
Also jio sim is a must in the phone which means you can’t use the current version of Jio4gvoice with Jio mifi devices. Another reason why ipad are left out. Seems like Apple doesn’t want user to have jio4gvoice on iphone 5s which is the main contender for this app missing the VoLTE feature.
iphone 6 and above models do have VoLTE. So this app is mostly beneficial for iphone 5S and below model. Iphone 5s is hottest selling phone for Apple in India. Interestingly on app store description of this app says ” Currently available for Mumbai and Karnataka users only” however it’s not being implemented as users from other state are also able to use this app without any glitch.