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Samsung reveals first tri-fold phone
(www.phonescoop.com)
This is a most excellent place for technology news and articles.
Which foldable do you own? There is no visible crease on my Fold 7 during normal use. The only way I can see it is by placing the phone directly under a light and angling it in an unnatural direction.
That said, my old Fold 4 had an obvious crease. But it's no longer an issue with modern foldables.