xperia Z3 and Z3c Distorted Voice Calls When Connected to WIFI

[itsmehuey]

I purchased an Xperia Z3, love the device but experiencing a MAJOR issue with voice calls being distorted when connected to WIFI. The person on the other side of the call can hear me fine but the line on my side of the call is all distorted and garbled. If I switch off WIFI or disconnect from WIFI then the voice calls work perfectly fine. The issue only occurs when I'm connected to WiFi. There seems to be multiple reports of this issue on Whirlpool forums and mainly for Optus customers. My partner's Xperia Z3c is also having the same issue. I returned one Z3 due to this issue and was given a replacement but the issue still persists on the replacement so I think there is a software issue that needs attention and needs to be fixed ASAP!

[tooch]

I'm having this exact same problem with my new Z3.

At my workplace in the Melbourne CBD, I'm unable to hear the other person on the phone at all if I'm on wifi at the same time. It's completely broken up and distorted, yet they can hear me clearly.

It's definitely not a problem with the provider (Optus also), as with wifi turned off there is no problem, and many of my colleagues in the same building are also with Optus and have no problem at all.

When I'm at home (approximately 20 km from Melbourne CBD), I can be on my home wifi and still make calls ok, so it appears to be maybe related to certain signal levels/frequencies?

Please look into this problem Sony, as the Z3 is a wonderful device and is almost perfect for my uses in every other way. Don't let this rather major but probably fixable issue mar an otherwise excellent flagship phone!

[Rickard]

Sorry to hear that you're having issues with audio during calls.

Can you please send me a PM with the following information and i will escalate this internally for further investigation:

Name:
Phone nr:
E-mail:
Country:
Operator:
IMEI nr:
Build number:

Could you also test if it happens regardless of network mode. Try GSM only and WCDMA only under Settings -> More -> Mobile networks -> Network mode.

[itsmehuey]

Just sent you a response, Rickard

[travs]

I've got this issue too and sent you a PM. Forcing the phone to GSM only "works" in the sense that calls are clear.  When on LTE and Wifi active, it is all garbled at least for me.  

This seems like a software issue; would love to get this fixed because I love this phone - other than this issue

[itsmehuey]

@Rickard - still no updates or solutions? This issue is starting to get very frustrating. Having to switch off wifi/switch to GSM everytime I need to make/take a call....

[Mr_Lu]

@itsmehuey Hello,  very strange behavior, which software is runing on your phone? 23.0.A.2.93? The distrorted sound you experenced is from ear-speaker or loud-speaker? 

[itsmehuey]

Correct, 23.0.A.2.93. It is occurring regardless of what I'm using - loud speaker, ear speaker, wired headphones, Bluetooth earphones etc..

[Rickard]

I don't have update yet i'm afraid. I will update this thread as soon as i have more information.

[Mazinkaiser]

Same problem here.

Regardless of LTE or Wifi I sound distorted to the people I call. My Boss just told me this morning I can't run meetings with this horrible sound. I told him I just got this phone and told me fix it. So Sony please fix it!

Android version 4.4.4

Model: D6616

Build 23.0.D.1.123

IMEI 

Carrier T-Mobile