I have got some problems with the grom BT3 and I guess is related to the installation or the functioning of the BMWS cable 10 pins end.
I have done all the assembly, the telephone is paired, I can reproduce songs (the title appear on my busniness cd BMW radio) but no sound at all through out the speakers. I can receive phonecalls and my microphone works, but no sound at all through out the speakers.
I have read the forums and it seems that is related to the 10 pin instalation.
I have tried all positions and no one give no sound at all. I understand that the right one is the one in the picture attached (https://ibb.co/vj0n2Kf
sorry I am not been able to upload it).
Any clue? Help is really appreciated.