Yes, I read or watched a review where they mentioned that you could hear the camera.Maybe it is the puureview camera. I have read somewhere that it can be heard when shaking the phone. And it is logical since the camera is supposed to move because of OIS.
Mine did the same, BUT - there is two distinct sounds you may hear
First sound is a thud, or solid/heavy hit (best heard when placing phone in the palm, gripping the sides, and moving your wrist left to right quickly) - You may also hear it when tapping on the glass- this is the battery - Exchange your device.
Second sound is more tinish or hollow - this is the acceleramator/vibe feature and should cause no issues - no exchange needed.
You are correct. I believe it was mentioned in one of the initial videos done by Engadget in Finland.Maybe it is the puureview camera. I have read somewhere that it can be heard when shaking the phone. And it is logical since the camera is supposed to move because of OIS.