I get SIM so in my phone there no volte support so I downloaded jio4gvoice app then problem occurs because for its running all time I want to start internet so jio runs on only 4G so battery draining very fast one one time it is not connect easily and battery is also draining fast but present day it is quickly connecting but when net is off then incoming calls attending is impossible and there is Option for massaging and video call I used video call today but not good why because in our village here network is slow but app is ok because there no another option for non volte devices.in case of calling to friend he also had jio sim there clear hd sound quality