https://community.sony.com.mk/t5/xa-series/signal-strength/m-p/3596432#M19739 <P>your ISP does NOT support voice over LTE. Voice can be transmitter only over HSMA or WCDMA&nbsp;</P><P>1) read wiki for VoLTE&nbsp;<A href="https://en.wikipedia.org/wiki/Voice_over_LTE" target="_blank" rel="nofollow noopener noreferrer">https://en.wikipedia.org/wiki/Voice_over_LTE</A></P><P>2) ask your ISP support for VoLTE calls and compatibilty with XA1 Ultra phone</P> Sun, 10 Dec 2017 20:41:04 GMT Brobddy 2017-12-10T20:41:04Z https://community.sony.com.mk/t5/xa-series/signal-strength/m-p/3596431#M19738 <P>I have an xa1 ultra and whenever i make or receive a call the signal strength goes down from LTE to h. I have set it to LTe preferred but the problem still is there. Any help?&nbsp;</P> Tue, 05 Dec 2017 21:27:56 GMT https://community.sony.com.mk/t5/xa-series/signal-strength/m-p/3596431#M19738 LordQuas23 2017-12-05T21:27:56Z https://community.sony.com.mk/t5/xa-series/signal-strength/m-p/3596432#M19739 <P>your ISP does NOT support voice over LTE. Voice can be transmitter only over HSMA or WCDMA&nbsp;</P><P>1) read wiki for VoLTE&nbsp;<A href="https://en.wikipedia.org/wiki/Voice_over_LTE" target="_blank" rel="nofollow noopener noreferrer">https://en.wikipedia.org/wiki/Voice_over_LTE</A></P><P>2) ask your ISP support for VoLTE calls and compatibilty with XA1 Ultra phone</P> Sun, 10 Dec 2017 20:41:04 GMT https://community.sony.com.mk/t5/xa-series/signal-strength/m-p/3596432#M19739 Brobddy 2017-12-10T20:41:04Z https://community.sony.com.mk/t5/xa-series/signal-strength/m-p/3596433#M19740 <P>I've noticed the same thing. I came to Sony from Blackberry Passport and never had a problem with signal strength and rarely dropped a call.&nbsp;</P><P>This phone drops calls, breaks up, and often the person on the other line cannot hear me at all.&nbsp;</P> Wed, 13 Dec 2017 02:54:30 GMT https://community.sony.com.mk/t5/xa-series/signal-strength/m-p/3596433#M19740 Moodyk 2017-12-13T02:54:30Z