Huawei has just introduced the Mate XT Ultimate, the world's first smartphone with a dual-fold design. When fully unfolded, the device measures 10.2 inches in diagonal. Folding the left section behind reduces it to a 7.9-inch foldable, and folding the right side transforms it into a compact 6.4-inch bar-style phone. Despite its complex design, the Mate XT Ultimate is impressively thin at 3.6 mm (unfolded) and weighs just 298 grams, even with its large camera setup based on the Mate X5 foldable. The device technically features a single screen—a flexible LTPO OLED with a 120...

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