title: How to make an Android phone as bluetooth headset
body: <p>I have 2 Android Phones, and I want to connect them together via bluetooth, and make one of them a bluetooth headset.</p>
  
  <p>So, my question is how to program the second phone to change its role profile to "Bluetooth Headset" when establishing the connection ?</p>
  
  <p>I've found this <a href="https://stackoverflow.com/questions/3163453/how-to-make-android-phone-as-a-bluetooth-headset">post</a> but my question is a little bit different</p>
  
  <p>Thank for any advice or idea :)</p>