Ever since the ICS update I've had bluetooth issues regardless of whether wifi is on or not. BT was rock solid on GB, so unless my hardware went bad, I'm pretty certain it's a software issue. I have to constantly reboot my phone as my BT gets stuck - refuses to turn on, even when on, can't get to BT settings as it crashes with an error. Those are my main problems and it's quite frustrating. Happy with the phone, but really hoping this gets fixed really soon. I can't stand rebooting my phone several times a day. Getting to be unacceptable if you ask me.