Almost week after update to Android 7.
New issue:
During the call sometimes phones screen became black(I still can speak and hear) and I cant disconnect the call or use any phone features untill the second side will drop the call.
What can I do?

Thanks!

Thanks for a quick reply! Can you please recommend me a steady and well tested launcher? And how can I change a home screen transition animations? - The Android 7 launcher of bv7000 don't support that app menu but feel free to install an other launcher. - It is not possible to easily remove the star...

Just finished flashing the phone with latest Android 7 (i didn't check the option of save userdata, so I'm re-installing and re-configuring all apps).

The issues are:
I can't find how I can change the display view to the classic (with apps menu button ) and how can I change display animation?