What is the hole on the right hand side of my iPhone 5?

What is the hole on the right hand side of my iPhone 5?

Would it be the headphone jack?

The tiny 'pin hole' sized hole? That's for either a special tool or a paperclip to pop into to release the sim card tray.

On the top back is the camera and on the bottom it would be the headphone jack

Must be the lanyard eyelet but i dont no the use of it.