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Interestingly, that are probably the only devices that work flawlessly for me. MacBook Pro in ~3 different environments, automatically pairs input devices and speakers and selects the audio I/O accordingly (i think it switches to the BT device if it was the active I/O when it was last connected). Same thing with the iPhone when paired with the Car BT. But with basically all other devices I made the same experiences. I find myself regularly reinstalling BT and audio drivers on a HP elitebook because it drops connections and can't find devices afterwards.