The iPhone Duo developing a crease over time is inevitable as the tides, and a matter of physics and engineering. Here’s how and why that crease develops, and what Apple has done to mitigate it.

iPhone Duo glass layers

iPhone Duo glass layers
In the run-up to Apple’s folding iPhone, there was a lot of chatter about how Apple has “solved the smartphone crease.” It’s always been a silly topic, as there is no solving it, there is only postponing it.
It’s an engineering problem on top of a physics problem. The physics are immutable.