I was in a quiet room today and noticed a very quiet tick sound at the end of the vibration sequence. It sounds like either the camera or just the vibrator abruptly stopping. It's very quiet and I would have never noticed it had my phone not been on the pillow next to my head, but I'm curious if this is how they all are. It's kind of like bzzzzzzzzzzzz......tick. I don think its a defect, just the way they are made, but wanted to verify.