I have a Samsung WEP479 headset that I use with my phone. Prior to the official samsung gingerbread update, it all worked fine. If my headset was on, and I answered a call the phone would switch to headset just fine. Also if I was on a call and my headset was off, if I turned the power on the headset, the phone would automatically switch over. Now it seems inconsistent. I can have the headset on and often it will not activate, sometimes while in the call, I will press the phone's headset button and it will pair, then sometimes it activates. My WIFI sleep mode is set to never.