is a known behavior of the One, if the speakers are disconnected from the power circuit. Happens even when the phone is in Silent mode. So far no one has been able to create remedies, it has been reported that various custom ROMs minimize the behavior. Take it out as annoying behavior, although it is a mistake, but you have to live with it. Incidentally also occurs in other phones, but does not stand out so because the speakers sit back there … Sent from my HTC

One with Tapatalk Beta 4