Hello Greg,
Sorry for the audio issue in 29.80.0.60 firmware. Indeed, not all phones upgraded to .60 firmware experience the issue. The issue happens in some specific condition. A configuraion change or reset in .60 firmware will correct the it.
To the other issue you mentioned, can you please directly post it in our forum.
http://forum.yealink.com/forum/index.php
Regards,
James