I had my 6S Plus replaced a few months back and the sound of the vibration keeps bothering me on the new one. In a quiet room or if you hold it near your head, click the silent switch on the side near volume buttons, what does yours sound like? Mine sounds like a bell. Very metal on metal type of sound, does not necessarily seem right. I do not have another 6S Plus to compare it too. 6 doesn't work to compare because it was before the taptic engine. All other vibrations are normal, it's just this very short silent on/off vibration that gives it this clanky bell type sound. I would love to hear what anyone else has noticed? Thanks.