I am experiencing the same issue as a few other users, and some other problems, but of primary concern is the bluetooth issue.
When powering on the ascending scale tone plays; battery level is announced; "Bluetooth Off" is then announced.
The noise cancellation is stuck at 10, and pressing the noise cancellation button has no effect, and no announcement is played to indicate a change in noise cancellation state.
Powering off does not play the descending scale tone I'd normally expect. But IIRC this is what it does when the audio cable is plugged in as well.
This problem occurred while I was sitting at a table eating breakfast in a fairly quiet environment. No adverse temperatures, humidity, noise, or EM interference.
Problem resolution steps:
1) Reset headphones by holding power button and plugging in USB charge cable, plugged into both an AC adapter and USB3 on my laptop - did not resolve the Bluetooth issue.
2) Tried clearing Bluetooth device list on the headphones by holding in the bluetooth button for 5 seconds; 10 seconds; 60+ seconds - this has no effect when done from powered on state or powered off state.
3) Updated to ver. 1.2.11 - did not resolve the Bluetooth issue.
4) Repeated steps 1 & 2 following the software update with the same result of not resolving the Bluetooth issue.
For all intents and purposes the headset is behaving as if the audio cable is plugged in.
The audio cable works normally.
Are there any Windows based USB diagnostic tools available? Or a factory reset tool via USB? Or another hard reset method other than the one used in step #1