I have an O2 Mini and I love it - except for some issues with headsets, both bluetooth and wored. The bluetooth headset will not connect, although it has been paired and shows up on the devices list. Is there a trick to get it automatically accepted when I turn it on? The wired headset has (standard O2 item) has a very low volume level that seems unaffected by either the volume adjust on the mike, or the volume slider on the side....