ZL C6503 microphone problem

[brenyoka]

I just received my new ZL C6503, and am on stock 5.1.1. It seems like a great phone, but just noticed that people can barely hear me during a call. I can hear them fine though.
I tried playing with the mic/call settings, like noise suppression off/on, etc, but to no effect. Anyone had same issue? How could this be fixed?

 

[control freak]

Go to service menu by typing *#*#7378423#*#*
Then go to service tests and go to primary microphone. test it there. That will help you point out if the problem is with mic or not.

 

[brenyoka]

Thanks for the advice. I tried it. It seems the mic does work, although its extremely quiet. What can it be? I have unlocked bootloader in case that matters for anything. Or should I try a different rom? I have the latest "nordic combined" flashed at the moment but I got the phone from HK as refurbished.

 

[kronos789]

Thanks for the advice. I tried it. It seems the mic does work, although its extremely quiet. What can it be? I have unlocked bootloader in case that matters for anything. Or should I try a different rom? I have the latest "nordic combined" flashed at the moment but I got the phone from HK as refurbished.

It could be a matter of the room, it happend to me with a S5, I know its not the model, but after doing a clean reinstall of the room the mic was working fine, so try to reinstall or change rom and see what it happends

 

[KJYap]

Highly chances is hardware issue. I have ZL which also have problem with primary mic. During calls I use loudspeaker,fortunately it works, mayb using the secondary mic behind.

 

[danieldp1990]

Check this video to see the dissasembly and check your mic. https://www.youtube.com/watch?v=7yADs4OsAXg