OK.
I followed your advice and after some difficulties of understanding and rereading the posts, I managed to come back in version 2017 12 27, then after the update to Oreo 8.0 it went well.
Thank you all for your help.
blackview_admin wrote:communicator wrote:Any information about an update Android 8.0 for the BV8000 pro ?
Not for the moment, anyway i will forward this request to the tech team.