Network issue

[Saroj04]

Im using xperia xz. Recently im facing problem with my phone. If im walking while on a call my other party cannot hear my voice properly. 

[CameronT]

Hi @Saroj04, welcome to the community.

That's a very odd issue you're experiencing, I am sorry to hear it.

So to clarify, if you stand still, is it OK and the other person can hear you, but if you move they can not?
Or is it just in certain areas they can't hear you, regardless of whether you are moving or not?

[Saroj04]

In any area it happens. Ya its the problem still exists. 

[CameronT]

@Saroj04,

Can you please test the microphone.

To do this go to Settings > About Phone > Diagnostics > Test > Microphone. See if you can hear the recording.