Galaxy Fold: Main Screen have a Crease at center while Unfolding the device
Samsung invented the Infinity Flex Display — a first of its kind — display technology that opens and closes naturally, just like a book.
The main display of the Galaxy Fold is made with an advanced polymer layer and adhesive which is flexible and tough enough to endure repeated folding.
Also, Galaxy Fold features a breakthrough design, with a tablet-sized screen that folds to fit comfortably in one hand.
The crease at the center of the main screen is due to characteristic of new Polymer material but it is a normal characteristic of device designed for Infinity Flex Display.
It does not affect the display’s quality, lifespan and performance and will not hinder the experience while using the device or viewing content.