Washington, Oct. 2 -- Apple has revealed that the nano-texture cover layer placed over the inner display of the iPhone Duo can be removed and replaced, giving owners an option to refresh the layer if it wears down or the display crease becomes more visible over time.

According to MacRumors, Apple vice president of hardware engineering Kate Bergeron disclosed the detail in an interview that, "It's actually replaceable, which is a really nice thing for the customer that you can peel off that layer and get a new one."

The cover layer is designed to help hide the crease running through the middle of the foldable inner display.

Bergeron said Apple carried out a "significant amount of engineering work" to keep the layer in good condition for...