[Galaxy S6 Q&A, Help & Troubleshooting] Zedavatar:
(Duplicated from previous post as per suggestion by admin. See here: https://xdaforums.com/general/help/voice-transmission-phone-calls-t3690651 See

Addendum

notes)

Hello! Long-time lurker, first time poster.

I have a sudden problem with my Android phone (Samsung Galaxy S6 running Android 7.0). Hopefully you bright gentlemen and gentle-ladies can help me:

Approximately 1 week ago (edit: 3 weeks ago), my phone stopped transmitting Voice data on phone calls. I cannot hear what the other user says on their phone, and they cannot hear me, however, pressing number keys DOES transmit the dial-tone to the other user (both ways). It does not matter if I call them or if they call me. It does not matter where I am physically, I have tried in several locations around the city (likely on several towers). It does not matter if they are using a mobile or land-line. (

Addendum

: Hangouts dialer functions perfectly with the hardware, before and after factory reset(s), Bluetooth headset works with Hangouts but not regular Phone)

During this time, all of my data connections work fine. Texts, Email and Browsing is unaffected. Phone performance is normal.

Since this has occurred, I have:

- Simulated battery disconnect

- Wiped Cache Partition

- Force-stopped the Phone app (all three instances)

- Verified the physical Microphone is working using the Voice Recorder app (it works fine)

- Booted the phone in Safe Mode

- Contacted my service provider to check in there was any problems with my account or transmissions.

- Transferred my Sim card to another device to test if my card/connection was ok. (Voice worked 100% on the secondary device)

- And lastly today (two weeks ago); Completed a Factory Reset

(

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:

- Flashed stock firmware from Sammobile via Odin

- Attempted to clean out the Microphones with toothpicks and blunt metal objects, just to be sure

- Plugged in and removed a wired headset as well as checking for debris)

I am sitting here now trying to understand how a hardware problem could possibly cause a failure of Voice encoding on only one app, and how to fix it. Or how a software problem survived the Factory Reset (and Firmware flash) into the fresh install. I did indeed try without any 3rd party apps being installed, without even adding my Google or Samsung accounts to the phone, just plain old Android; no dice.

Any suggestions?

I recall one fixing another phone that had a problem with its Capacitive Touch Screen being not sensitive enough/not reading presses problem by accessing a special menu that allowed me to re-download the driver. Is there anything like that for the Voice? (

Addendum

- I have looked at all the star ** codes available for this model and tried several, nothing has worked so far)

Thanks!

Thoughts today (Oct 31/17): I am not sure that flashing a custom rom is really what may fix the phone. I am willing to do so, but it is somewhat frowned upon by Canadian carriers (or at least it used to be). I was curious if it was a problem with Noise Cancellation or an SD Card problem as those are issues brought up when googling the issue. My current plan is to flash to a stock Android 6.0.1 and see if the phone works then. If so, then try the standard upgrade path. Any suggestions will be helpful!