Why do I hear something’s by shake nag inside my phone?

Junior Mister, You’ll need to open your phone up and inspect what has come loose.

If look look over the device page of your selected device, you can fex use the battery replacement guide to see how you open up your phone. You’ll need the correct screwdriver in order to open it up (P2 pentalobe) and then a thin plastic prying tool along with a suction cup. Let me suggest Clampy!

When you have the device open, go ahead and take some good quality and up close pictures, then update your question. Adding images to existing questions. We can tell you what has happened from there.