I am gonna share some experience that I have faced while using the jio 4G voice,
This app is externally used for HD calling if VOLTE does not work on your phone,
But in my opinion its quite disappointing because networking of jio is unstable calls couldn’t connect properly, even if it is connected call quality is bad too.
2-Using this app it heats up my phone quickly
3-It drowns battery quickly - Thank you