I have just purchased a new BV9000 (ROM version 0.5-20180199).
The phone is completely useless in speakerphone/handsfree mode because the outbound audio is very low and completely muffled, so much so that the other party cannot understand what is being said.
Also when recording via the inbuilt app the recording levels are so low that the Vu meter barely moves and the recorded audio is very quiet.
This problem also seems to impact upon the accuracy of Google Voice.
This is the first time I have moved away from Samsung phones in amny years and did so because the online reviews were good, but now I am regretting it because the faults mean that two of the things I frequently use the phone for (handsfree and recording) do not work.