something rattles in my iphone when i shake it

ecarter10,

Is the rattle more like a thud or a quiter rattle? The reason I ask is because of the following:

Some users have complained of a thud when the phone shakes. These are cases where the iPhone battery has become loose from the adhesive holding it into place. Apple will most likely replace the device for you if you go through AppleCare or repair it if you take it into a store. I had a loose battery and they shipped me a replacement device. You can also temporarily fix it by applying pressure on the device (as in the video below) but I do not recommend this as it is only temporary and it may cause more damage.

If you don't hear a thud, but instead hear more of a rattle sound - this is most likely coming from the camera area of the phone. All iPhones have done this. Some devices make a louder sound than others. I don't know the details, but from what I understand it has something to do with the camera and auto focus. It is normal - although some devices may have it louder and be more annoying. Apple most likely will not replace a device for this.

If you need to know the difference between a "thud" and rattle, look here: http://www.youtube.com/watch?v=28v9f9xBcDo

I hope this helps!