Share your experience!
Hello guys...help me to solve my problem.
My microphone is not function well during a call...but when i try to diagnose in setting menu...it's work perfectly...i don't know what the problem is...PLEASE HELP ME
still not change
And you are making regular calls with the preinstalled phone app or a third party app?
With phone app...not third party
Hi @Jay00, sorry to hear about this. 
Have you tried changing the network mode in your device and made a few calls? If you haven't done that, I'd recommend doing that, just to make sure that this is not caused by the network.
You can change the network mode in Settings > More > Mobile networks > Preferred network type > GSM Only. Try making a few calls now and see if the microphone works correctly.
Let us know how it goes!
I have the same problem. No one found solution for this yet .This over 1 year now. Mic echo is slow during calls but when turn on loudspeaker it's work perfectly.
Please give a solution for this quickly.
Hi @Danuka, sorry to hear about this. 
Have you had the chance to try the previous troubleshooting that I have posted in this thread? If you haven't done that, do that to start with and report back with how it went! 
I tried everything in this thread and other threads but nothing changed problem still have