Where are all the valuable old comments on V4 ?? No good style that you just delete what was said. Hours of documentation and test work by the community deleted with a mouse click...
Ah, it is still there, buried in the forum:
So, you replaced the ap6212 firmware file with a newer bcm43438a0.hcd, a copy and paste job.
While WIFI is fixed, also Bluetooth A2DP now works perfectly with this Android.
You don't test I know.
Now please fix the native full HD graphics output (no helper apps needed: Nomone ŕesolution changer´from app store).
Anyway, thanks for fixing Wifi and Bluetooth (by lucky punch).
PS: I used newer firmware file and replaced it in V4 image: