Jio 4g voice app is using for calling by joi network. It required to those 4g mobile only which no wallet option . By which dirrct calling is not done from mobile call lgo. So jio make the jio4g voice . By this we are able to calling . This app required the internet connection to make a call from this app. The layout is bitter older its required to change. In starting day it getting issues to make a call but by passing day it make better and all massages and calls are in or out through this app. But when internet data is off than number is switced off no calls are made from it .