FM signal played over BlueTooth

[Win10X64_Mobil]

I havea lumia 640 running the latest version of Windows 10 Mobile - 10.0.10586.63.

I love the FM radio feature, but it will only allow you to output via the built in speaker or the ear phones. Why not allow the sound to be sent to a connected bluetooth speaker?

 

[Danjp]

The headphone wire acts as the FM antenna, without out it you wouldn't get any stations.

This is the case for all phones with a FM tuner.