[Q] Use bluetooth headphones microphone in calls and apps

I'm using a ROM based on Android 5.0, not rooted, but rooting is doable. I have a set of Bluetooth headphones (JBL Mini Reflect BT) and no audio input is taken from their microphone (not in calls, but neither in apps like Recorder or Skype) and the phone's internal microphone is used instead. Would it be possible to use the BT headphones' microphone in the same way as a wired headset's microphone is used when connected (meaning it would override the internal microphone by default and be used in both calls and apps)? If yes, how should this be done (which apps/which settings)? At the moment I cannot use BT microphone in any of the apps/calls.