Be it fully charged or low battery, my headphone automatically turns on itself and connects with paired devices whereas the switch button is off. It has only been a year and this really deteriorates my perception of the Bose products quality.
Does anyone know how to solve this other than going to the service center?
Confirm you have a QC35ii and not QC35i because your scenario is definitely a known hardware issue for the QC35i. What version is your firmware?
@cannotkissanideaHere is another possibility to eliminate. Go get yourself/download a free Bluetooth Low Energy (BLE) app. On my iphone, for example, I use the app, "BLE Scanner". You should not see a BLE signal from your QC35ii when it is turned off. I don't on mine. If it was sending out a BLE signal when off (like the Revolve's do), then other devices can turn it on when it is off. You want to eliminate this as a possibility.
@cannotkissanideaSo that eliminated BLE as the reason it turns on. I wonder (though I have seen nothing convincing yet here) if some QC35ii switches are the same ones that were faulty on the QC35i's. I remember almost two years ago when I exchanged my faulty QC35i for a QC35ii, there was a distinct different 'feel' for when I switched the unit on and off. The QC35ii switch felt sturdier - like I needed to put a little extra pressure to push it. The QC35i was much easier/looser to push.