“Lejun on Xiaomi 18 Fold foldable phone: It was initiated two years ago, and the development took 20 months. It is Xiaomi’s most advanced phone to date.”
On September 7, 2026, at Xiaomi’s autumn flagship product launch event, founder and CEO Lei Jun revealed that the Xiaomi 18 Fold, a foldable phone, was initiated two years ago and developed over 20 months. It is Xiaomi’s most advanced smartphone to date. This model aims to combine the advantages of both small and large foldables, using a standard paper ratio of approximately √2:1 to create a new form with more suitable dimensions and comfortable proportions, allowing for seamless reading, viewing, and working without the need for cutting or scaling. Previously, Xiaomi has already launched four large-foldable and two small-foldable phones; this new product is the result of continuous exploration into combining both types.
Lei Jun, founder, chairman, and CEO of Xiaomi, revealed at today’s autumn flagship product launch that the Xiaomi 18 Fold, a foldable phone, was initiated in two years ago and developed over 20 months. It is Xiaomi’s most advanced smartphone to date. This model combines the advantages of both small and large folds, using a paper-size ratio of approximately √2:1, aiming to create a new form with more suitable dimensions and more comfortable proportions. Lei Jun said that this ratio makes reading as natural as reading a book, watching movies without cutting, and editing office documents without scaling, making the content clear at a glance. Xiaomi has previously launched four large-fold and two small-fold phones, and continues to think about how to combine the advantages of both to create new forms.