Crack open either phone and you’ll find a ton of heat dissipation. The back of the screen is covered in copper, so it’s a big heat sink. Under the display, the interior is covered in sticky, heat-dissipating graphite film, making the phone look strikingly messier than the carefully curated insides of the iPhone 13. Below that is more heat dissipation: an aluminum mid-plate that connects to the major chips with thermal tape.
The back of the screen is also interesting. On the left is the under-display fingerprint reader, and you can see why companies are such fans of these components over capacitive rear fingerprint readers. An optical reader is a super-thin sticker on the back of the display—it looks like it’s only a millimeter or so thick. You can also spot the cutout for the under-display brightness and proximity sensors, which, like the fingerprint reader, invisibly live under the display.