Origineel bericht door: Taylor Arnicar ,
Gabriel, I tested this with an iPhone 4, the sound that you are hearing when you shake your phone is in fact just the sleep button itself. This is why the noise goes away when you hold the sleep button in place. You in fact don't need to push the button down all the way to stop the noise, you can just hold the button still with your finger. This seems to be true of all iPhone 4's - there's nothing loose, or wrong with your phone at all. Good catch though!