Comment 2 for bug 1661107

I attempted to replicate this with bluetooth headphones and managed to take a call (although forgot I had headphones on :-( at first) and this function actually seemed to work Sander...do you have any other bluetooth audio devices to test this on and also can you confirm what version you are running on the FP2 (ie are you on stable or devel_rc_proposed ?)
You can check this in your settings (about phone) if unsure (apologies if you know this already)