Call quality audio from earpiece speaker is still bad at full volume even after latest 22 July 2019 update version WW-16.1220.1906.167. call quality at 75% volume is OK but at full volume the audio distorts especially if the person you are talking to is standing somewhere there is background noise (like other people is talking in background or music is playing in background) that background noise becomes wavy/screechy/distorted and even make person voice inaudible.