This slim and rigid midframe is likely made of magnesium, and is clipped (really firmly) onto the body of the phone.

When we say "rigid" we expect it to not be "bendy". We expected wrong. Oops. It'll bend back.

On the left, the midframe holds a mysterious ribbon connector and an earpiece speaker.

And to the right, the rest of the phone, complete with motherboard sporting a matte black finish.

The daughterboard is a standard blue-green; no family resemblance there.