Martin K wrote:

I had the same problem with my car handsfree connection and did not get help from Blackview. I tried all different things what they suggested but no any result. Almost 1 year passed and last week I started researching it again, where the problem could be. Nothing helped. As a last resort I did a phone back-up and hard reset to the factory settings (deleted all from the phone, I mean all), uploaded last ver. of android and after that everything seems to be working (at least for now). The back-up did not cover the account settlements and they all disappeared and had to be done again.
In short, I got it work that way..