no camera sound on my iPhone 6s Plus

I just got my new iPhone 6s Plus this day, after I turn on the iPhone and doing activation, i try check some features on my new iPhone. But when I try using the camera there is no sound when I take a picture. I try to force close the application and opened it again and still no sound at all, I try reset the iPhone but still no sound when I take a picture. Any idea what can I do? Thank you.