title: Iphone How to know if Bluetooth headset connected
body: <p>using iphone sdk 3.1.2.</p>
  
  <p>Is there anyway of knowing if a Bluetooth headset is connected to the device? Don't need any info except if its connected or not. This is different from knowing if one was plugged in or not which one can do via a Property Listener of an Audio Session.</p>
  
  <p>Thanks</p>