The noise I heard was more of a 'pinging' or rattling noise. Fortunately, I was able to simply exchange my device on the last day of my return window. The new device seems fine overall with a small clink noise to the vibrator but after listening to yet another 6S + vibrator, the clink seems to be 'normal', If your vibrator makes a fairly audible noise, most certainly call applecare (despite how cumbersome and unwilling to help they may seem) and they may be able to reserve a new device at a store nearby as a one time courtesy. Just be sure to ask for a senior apple adviser.