Moving on from the logic board, here are two more logic boards.

The new XR board + SIM reader (center) looks a bit like an unfolded iPhone X board (right). The sprawling iPhone 8 Plus board is shown at left for comparison.

This new form factor pretty much perfectly fills the gap in the evolution of iPhone logic boards.

A closeup via X-rays reminds us that this "simplified" iPhone logic board is still enormously complex.

Even more silicon hides beneath other components, like the TrueDepth camera system.