Official
3 publications · October 12, 2026
Apple says the iPhone Duo cools its A20 Pro chip with graphite pipes routed through the hinge
Key points
- Apple's thermal and silicon engineers say graphite pipes run through the iPhone Duo's hinge to help cool the chip.
- The Duo is Apple's first foldable iPhone.
- Notebookcheck describes the Duo as the thinnest smartphone Apple has ever released.
- The Duo uses an enhanced version of the A20 Pro processor, which PCMag calls Apple's most advanced mobile chip.
- The iPhone 18 Pro lines use the same A20 Pro chip and share the custom cooling technology.
Summary
(AI)
This comes from Apple itself. PCMag ran an exclusive interview with Apple’s silicon and thermal engineering teams, and the other two outlets built on that conversation. The coverage is about how the phone is cooled. It does not give test results for how well the cooling works.
Coverage frames the hinge as a design answer to the problem of cooling a thin, folding phone. 9to5Mac says a folding body created a new challenge for Apple’s thermal team, and that the team used the hinge to their advantage. Notebookcheck says this was one of several surprising decisions that made the thin design possible. The coverage does not say how the Duo performs under load or how it compares with other foldables.
In this story