Is It OK If My iPhone 5's Lock Button Is Loose And Rattles?

I bought an iPhone 5, but the lock button is loose, and when I shake it and pick it up it rattles, it's so annoying, it that OK?

I would not be happy with a loose lock button.

I would take or send it back to Apple for a replacement.

I would not be happy with a loose lock button.

I would take or send it back to Apple for a replacement

I would not be happy with a loose lock button.

I would take or send it back to Apple for a replacement.