That sounds like mic/cable interference to me. It a hardware problem. If you are using the external mic, from my testing (unit tested on my desk at home) the mic cable is not shielded at all and picks up really easy all the interference that the unit gives out and the one you are talking to on the phone hears all these strange sounds that the mic cable pics up.
1. first test mic cable is ok, test that is plugged in correctly, make a Google + voice call again, if the sound is bad go to step 2
2. unplug the mic, the one near the screen will take over, do the test again ? is it better? I bet it's better
3. if it's better you need an mic with good shielded cable
4. if the call test it's not better and the sound is same bad quality that means that you have an hardware issue related to the internals, mic, flat cables.
5. you can either have a look in side and check if all the flat cables inside the headunit and properly inserted
6. or you can send the unit for warranty repairs
Eureka!! I figured it out. I ended up factory resetting, reflashing, and then resetting again. However the problem of terrible noise with Bluetooth Calls during Google Maps still persisted. I was quite disheartened, I also noticed if I hit the home button during the call the call quality would return to normal. So I knew it was something to do with Google Maps. My last ditch effort was to go into the Google app and disable "Ok Google Detection in Google Maps" and VOILA I tested a call during the same scenario and no weird interference! So if anyone else has this issue, just do as stated. Finally, I think my head unit is near back to where I want it.
Cheers Thanks again for all the Q/As it helped greatly!
Thank you for returning with a solution to your problem.
Tried to recreate your issue on my unit but I could't. (paired phone, google maps, google app installed, calling my phone while google apps running)
Do you have Google Assistant (velvet.apk) installed by any chance?
|Thread Tools||Search this Thread|