Guys, I have just received the new iPhone 4s (Black, 64GB). It goes without saying that I love the phone and everything seems to be great (the screen, the home button etc.) However, I have noticed that the mute/silent switch is a bit loose. (compared to the iPhones of my friends) It just doesn't feel right: when the switch is in on-off position, it wiggles a little bit. Do you know whether it is a major problem/defect? I am so afraid that it will break down in the future.