My BV6000 has very very low sound coming out of the speaker. Alston at Blackview is kindly supplying a replacement speaker. Does anyone have experience with this repair? Is it possible that there is a OS bug or conflict that causes the sound to be so low? The sound cand be heard when placing the speakerport against the ear and the quality is OK, not fuzzy. Any comments?

Hope this will help you.
To enter the engineers code go to phone and dial pad and enter the code.
*#9646633#
You are now in engineer mode with the top tab telephony.
swipe across until you get to hardware testing.
select audio
select volume
select voice
you will see the drop down menu for receiver, hac, headset, speaker.
select either receiver or speaker
manually change UL gain to say 240.
scroll down the screen and hit the button Set.
go back using < key.
then select voice again just to check the setting for UL gain has changed
then press home and test by ringing someone or receiving a call."