https://community.sony.com.mk/t5/xz-series/volte-app-needed/m-p/3577454#M24548 <P>My Mobile phone is factory Unlocked Sony Xperia XZ Model F8331 (US) Single Sim.</P><P>I reside in India. I am using Jio4G sim and network. The problem is Jio is not allowing make and receive calls and messages unless Jio4GVoice application is installed. To avoid using this application the phone must be capable of VoLTE. So I tried by using:</P><P>*#*#4636#*#* to enable VoLTE</P><P>The following options are displayed:</P><P>Mobile radio power&nbsp;&nbsp;&nbsp; this is existing (enabled)</P><P>VoLTE provisioned Not enabled and tried to enable</P><P>Video calling provisioned disabled</P><P>Wi-Fi calling provisioned disabled</P><P>When I tried to change to "VoLTE Provisioned" an error message is displayed</P><P>SMSC: Update error</P><P>I don't know what to do to solve this problem</P> Wed, 20 Sep 2017 05:23:08 GMT SuryaSoma 2017-09-20T05:23:08Z https://community.sony.com.mk/t5/xz-series/volte-app-needed/m-p/3577454#M24548 <P>My Mobile phone is factory Unlocked Sony Xperia XZ Model F8331 (US) Single Sim.</P><P>I reside in India. I am using Jio4G sim and network. The problem is Jio is not allowing make and receive calls and messages unless Jio4GVoice application is installed. To avoid using this application the phone must be capable of VoLTE. So I tried by using:</P><P>*#*#4636#*#* to enable VoLTE</P><P>The following options are displayed:</P><P>Mobile radio power&nbsp;&nbsp;&nbsp; this is existing (enabled)</P><P>VoLTE provisioned Not enabled and tried to enable</P><P>Video calling provisioned disabled</P><P>Wi-Fi calling provisioned disabled</P><P>When I tried to change to "VoLTE Provisioned" an error message is displayed</P><P>SMSC: Update error</P><P>I don't know what to do to solve this problem</P> Wed, 20 Sep 2017 05:23:08 GMT https://community.sony.com.mk/t5/xz-series/volte-app-needed/m-p/3577454#M24548 SuryaSoma 2017-09-20T05:23:08Z