Xiaomi has chosen an interesting moment to return to foldables. The company has not released a book-style foldable since the Mix Fold 4, which launched in 2024, and now it is back with the Xiaomi 18 Fold just as compact foldables are starting to get more attention. Samsung has also added a foldable in this compact format to its lineup, and Apple is widely expected to unveil its first foldable iPhone at its September 9 event with a similar form factor in mind.
That puts the Xiaomi 18 Fold in an interesting spot. It is not just Xiaomi coming back to foldables after a break. It is also arriving just as this smaller book-style format looks like it could become the next big thing.
Designer: Xiaomi
Xiaomi is positioning the 18 Fold as its first mid-size flagship foldable. It weighs 7.73 ounces (219g), measures 0.42 inches thick when folded (10.68mm), and opens out to just 0.20 inches thick (5.02mm), with a folded footprint of 4.64 x 3.29 inches (117.8 x 83.6mm). In person, it feels thin, though not unusually thin by the standards of today’s premium foldables. More importantly, it feels expensive in a good way. The matte texture on the back and frame gives it a softer, understated finish, while the rounded corners and flat frame help the phone look clean and modern.
The unit I handled was the deep red version, and it is a bold color in person. It stands out more than the usual black or silver foldable palette without feeling too loud. It also happens to echo the deep red finish rumored for Apple’s first foldable, which makes the comparison hard to miss. The 18 Fold comes in Black, White, Red, and a Ceramic Version.
In practice, though, this is still a two-handed phone whether it is folded or unfolded. Even closed, the body is compact in one sense but still broad enough that I did not think of it as something built for easy one-handed use. That is not really a criticism. It just comes with the territory.
The outer display is a 5.38-inch panel, while the inside opens up to a 7.58-inch main screen. Xiaomi says both displays share the same aspect ratio, which is meant to make the transition from one to the other feel more natural. I could not fully judge how well that works in daily use from a short demo, but one benefit stood out right away. Video felt more immersive than on squarer foldables because there was less black bar space above and below the image.
The software also looked well suited to the shape. Animations felt smooth in my brief demo, and I did see split-screen and floating window support in action. The unfolded UI felt more like a small tablet than a stretched phone, which is what you want on a device like this. Xiaomi has also placed one speaker on the top edge and another on the bottom edge on the opposite side, which should help give the phone a more balanced stereo effect when it is open.
The hinge left a good first impression too. I cannot really say whether it felt especially firm or especially smooth, because my time with the device was limited, but it did feel sturdy. The crease was handled well too. Looking straight at the display, I only really noticed it from certain angles rather than all the time. More importantly, I could barely feel it when running a finger across the center, which was better than I expected.
Left: Xiaomi 18 Fold, Right: Galaxy Z Fold 8
Left: Galaxy Z Fold 8, Right: Xiaomi 18 Fold
Left: Galaxy Z Fold 8, Right: Xiaomi 18 Fold
I also compared the Xiaomi 18 Fold side by side with Samsung’s Galaxy Z Fold 8. Samsung’s device measures 4.88 x 3.22 x 0.38 inches when folded (123.9 x 81.9 x 9.7mm), 6.35 x 4.88 x 0.18 inches when unfolded (161.4 x 123.9 x 4.5cm), and weighs 7.09 ounces (201g), so it is a little lighter and a bit thinner than Xiaomi’s foldable in some areas. But the difference was not just about dimensions. Samsung’s inner screen was noticeably brighter to my eyes. At the same time, the Xiaomi 18 Fold had one practical advantage that stood out immediately. When placed on a desk, it did not wobble, while the Samsung did.
Left: Galaxy Z Fold 8, Right: Xiaomi 18 Fold
Left: Galaxy Z Fold 8, Right: Xiaomi 18 Fold
Top: Xiaomi 18 Fold, Bottom: Galaxy Z Fold 8
The biggest surprise for me was the camera. Xiaomi is using a 200MP Leica triple-camera system, led by a 200MP main camera and backed by a 50MP Leica periscope telephoto with an 80mm equivalent focal length. In my short time with the phone, the telephoto camera was the part that stuck with me most. I tried zoom, and the 3.5x telephoto setup immediately felt like one of the most interesting parts of the device. Stability also felt good even at higher magnification, which made the zoom feel more usable, not just more dramatic. The camera bump also did not seem overly large, and its oval-shaped, two-step raised design gives it some presence without taking over the whole back.
My time with the Xiaomi 18 Fold was brief, and this hands-on really only scratched the surface. Even so, the phone already feels like a polished return to book-style foldables. Pricing starts at RMB 10,999, or roughly $1,640, for the 12GB/256GB model, and Xiaomi said it will be available in China only for now.
