Hi djralph_0476, Thanks for your patience. We have improved the sound quality in wired headset and bluetooth devices on the latest firmware update WW-17.2018.2007.428. You may manually download it from our website: https://www.asus.com/Phone/ZenFone-Max-Pro-M2/HelpDesk_Download/ System upgrade may cause part of data missing, please backup your important data before system upgrading. Thank you.