Xiaomi Mix Fold 4 may launch in China soon. The model is expected to succeed the Xiaomi Mix Fold 3, which was unveiled in August 2023. Although the company is yet to confirm the existence of handset or any of its details, key features of the anticipated book-style foldable smartphone have surfaced online.Xiaomi Mix Fold 4 may launch in China soon. The model is expected to succeed the Xiaomi Mix Fold 3, which was unveiled in August 2023. Although the company is yet to confirm the existence of handset or any of its details, key features of the anticipated book-style foldable smartphone have surfaced online.