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Huawei unveils world’s first tri-fold phone, the Mate XT Ultimate Design
(spillsomebeans.com)
This is a most excellent place for technology news and articles.
Pedantic nit: this thing doesn't have three folds, the name is nonsense.
Pedantic return: it has 3 screens with 2 connecting hinges, it is therefore trifold.
trifold in American English (ˈtraiˌfould) adjective
And two fold is how many screens ?
2, with 1 hinge. It's like a normal phone but the screen number increased twofold.