Use internal microphone instead of bluetooth headset

Hello,

I have an issue and I haven't figured out how to solve it.
Even if there is a bluetooth headset connected to deal with calls i'd like to ignore bluetooth microphone and always use phone's mic for calls and any another use. Of course I still want to use bluetooth speakers ;-)

According to what I've understood this behaviour is applicable when phone is connected to wired headphone. Is it possible to extend it for bluetooth ones?

Thanks you in advance for your answer.
Have a nice day !

would like a solution to this as well. I use a bluetooth receiver, which doesn't have a microphone, for my car and connect that to the 3.5mm jack.

Android won't allow using an audio input from one device and audio output from another device, when you are in a phone call. The Android policy manager will force the Bluetooth to use both its speaker and its microphone.