"The back button behaviour can't be considered a problem" 
blackview seems not to be a serious label, I plan to change unit, very disapointed... too many bugs.
I know what I say, too.
Sincerely

Why do you notice this topic as "solved" ? If downgrade firmware, then problems of ptt button are back (and some other bugs)
And what about the back button problem ?
Sincerely
Yvan

my firmware is BV8000Pro-Blackview-V0.1_20170803_20180307-1950

any solutions to solve those huge bugs ?
Sincerely
Yvan

My bv8000 pro begins to get on my nerves. Screen sensitivity is quiet bad. It suddenly lost all my Bluetooth associations, I use use it for professional use and it should be a professional unit... The back button is a real nightmare, some applications really need it. if you switch on/off, you (somet...

My bv8000 pro begins to get on my nerves. Screen sensitivity is quiet bad. It suddenly lost all my Bluetooth associations, I use use it for professional use and it should be a professional unit... The back button is a real nightmare, some applications really need it. if you switch on/off, you (somet...

In astronomy, soon is about Million years...

Thanks for your answer, my sos bug is not very important (what could be defective ?) as I only use PTT function with Zello. I desactivate the multifonction key in parameters. My real very bad problem is the back button that sometimes don't respond at all and when it "works", the sensitive ...

Personnally, I installed latest rom and root it then, you just change the extension of /system/media/bootaudio.mp3 to bootaudio.mp3.old (for example) and cool silent booting.
The only clean rom and root was for me : 20180308, with twrp 311, magisk 16.02 and xposed
yvan

Hello, I have a BV8000 pro and I'm almost satisfyed except : If you activate the multifunction switch (for SOS option), the unit partially reboot and you loose fingerprint identification... Only usable in ptt mode. The sensitivity of back button is a real nightmare, works in avery small area... from...