Jio4g voice is an application which is used to make calls in the phone which don’t have a VOLTE feature. The concept is very good as will help many users for having better jio experience. But while using this feature I noticed that the application disconnect while talking which is very irritating and creates a lot of problems in emergency. The layout and design of this application is clean and smooth, easy to use. The highlighting feature of the application is it’s ability to make calls even in non VOLTE phones. But still this phone is not very useful as it disconnects regularly while calling. Therefore I suggest to use jio sim in phone which supports VOLTE.