Screen goes black while in call

[Igs]

Hi,anyone have this issue in the moment when start ringing on the other side,screen goes black i can wake it up only by double pressing the camera key,i read that this is common issue with xz2 phones someone has report that changing the stock dialer is making this problem goes away but not in my case,i check sensors in diagnostic menu phone says diagnostic is ok,im not using any screen protectors or covers and nothing is covering the sensors,i did full factory reset and having the same problem again,i dont have a warranty on it so any susggestion would be great.

[NunoSEN2]

@Igs;

I supose you tested the device after factory reset before install any backup or third party apps, if not test the device in safe mode.

After factory reset the only thing you can do software wise is a software repair with Xperia Companion.

[Igs]

Okay,how to test device in safe mode? I know all about companion ill try to repair it

[NunoSEN2]

@Igs;

Here you have: Safe Mode

[Igs]

In safe mode problem remain the same, and software repair with companion is the same thing like clean install factory reset I didn't do it because it's a same thing (I didn't get any result with factory reset)

Before reset and after reset situation is the same. 

[NunoSEN2 · Accepted solution]

@Igs;

Let me just clarify you that a factory reset is not exactly the same thing as software repair with Xperia Companion because a factory reset simply erases all data and restores settings to factory default with the files existent on the phone, a software repair with Xperia Companion makes a fresh clean installation with a download of the last firmware available for the device.

[Igs]

Current firmare in the phone and one offer by sony companio is the same one

[NunoSEN2]

Yes @Igs, but there is always the possibility (remote) that some files in your phone might be corrupted or missing.

[Igs]

Okay,i will give a  shot later,but i read that repair with s.companion problem remail,will report here

[NunoSEN2]

@Igs, just to clarify, are you sure the proximity sensor test in diagnostic is resulting ok (turning on when you cover the sensor and off when you uncover it)?