Updated to WP8.1 couple months ago and everything was working fine.
Now handset speaker/mic doesn't work. Phone does work with headset plugged in or connected to my car via Bluetooth.
Volume control drop down scroll bar only shows headset volume (used to show ringer volume as well). Ringer does work.
Tried shutdown/restart, hard reset, and now have done a full reboot back to initial state. No change.
Suggestions?