I have upgraded my BV7000 Pro to this version, it has not fixed my A2DP Bluetooth problems.
I might add something to the guide : if you are on Windows 10, the driver installation is not really straightforward. There is a tutorial here : https://forum.xda-developers.com/elepho ... 4-t3267033
Furthermore, I haven't add to push any buttons on my phone to install the firmware : shut it down, connect the cable at the phone end, hit "download" on the software and only then connect it the pc end. It enabled me to recover a soft-bricked phone ( I had interrupted the process during to deselect userdata but the phone would not boot after completion.)
Beware that this will completely wipe your phone as I wasn't able to flash it conserving the userdata partition.
Here's hoping Android 7 will come soon.