Before we dive in blindly, let's get some 10-ray X-ray recon from our friends at Creative Electron.

Here's what we found:

Not one, but two battery cells. That's a first in an iPhone!

A super-tiny logic board footprint. Based on the overlaid solder points, it looks like there are two stacked layers.

To make room for the extra front-facing sensors, the earpiece speaker has been shifted down quite a bit.

There's a mysterious chip between the Taptic Engine and lower speaker—we're curious to see what's down there!