Is everyone happy with the voice call quality on CM12.1 Nexus 5? I can hear the caller most of the time fine, but the caller always have a hard time hearing or has a lot of echo effect. I was hoping this update will fix it, but still same. I tried it on 2 Nexus 5 devices and both are doing exact same.

Also, does this build use the second microphone to reduce background noice? It doesn't look like it does.

Any ideas to fix it?