Xiaomi Unveils Striking Red Xiaomi 18 Fold Design: Debuts 3nm In-House XRING O3 Chipset, Compact Cover Display, and HyperOS 4

Xiaomi has officially revealed the design and core architecture of its next-generation foldable, the Xiaomi 18 Fold. The preview marks Xiaomi’s return to wide, book-style foldables following a two-year hiatus, succeeding the older MIX Fold series with an entirely rebuilt chassis. Debuting in an elegant deep Cabernet Red colorway, the device is engineered with a compact external footprint, an in-house custom 3nm processor, and deep cross-device interconnectivity.

The company released initial teaser footage showcasing an ultra-narrow symmetrical bezel profile, rounded corner geometry, and an updated Dragon Bone hinge assembly ahead of an official launch event scheduled for September 7 in China.

30-Second TL;DR

• Core News: Xiaomi officially showcased the Xiaomi 18 Fold in a deep red finish, ending a two-year gap in its wide-foldable roadmap.
• Display Ergonomics: Features a compact 5.38-inch cover screen and a 7.58-inch inner LTPO OLED display tuned with a wider book-like aspect ratio for reading and multitasking.
• Proprietary Silicon: Debuts Xiaomi’s in-house XRING O3 processor fabricated on a 3nm node, paired with next-generation LPDDR6 memory.
• Ecosystem & Power: Runs HyperOS 4 on Android 17, integrating with Xiaomi’s Human × Car × Home ecosystem alongside a 6,000mAh battery and a triple Leica camera visor.

Compact “Book-Style” Form Factor and Deep Red Aesthetics

Unlike tall, narrow foldables that can feel awkward to navigate with one hand, the Xiaomi 18 Fold adopts a broader, more balanced aspect ratio reminiscent of a pocket notebook.

• Dual Display Layout: The exterior houses a 5.38-inch cover display with an ergonomic width, while unfolding the handset reveals a 7.58-inch LTPO OLED folding canvas. The inner panel supports adaptive 1-120Hz refresh rates, high-frequency PWM eye protection, and multi-window side-by-side app pairing.
• Striking Red Finish: The back is finished in a rich, matte Cabernet Red glass-ceramic composite paired with a color-matched anodized aluminum frame.
• Dragon Bone Hinge: Xiaomi has integrated an upgraded multi-link “Dragon Bone” teardrop hinge that minimizes the center display crease while enabling flat table-top Flex-mode angles.

In-House 3nm XRING O3 Silicon and HyperOS 4 Architecture

A pivotal milestone for the device is the debut of the XRING O3, Xiaomi’s in-house 5G mobile platform. Fabricated on TSMC’s 3nm fabrication node, the chipset is engineered to deliver high thermal efficiency and sustained multi-core computing power.

• Layered CPU & GPU: Incorporates a 10-core CPU layout reaching clock speeds up to 4.35GHz, paired with a custom 16-core G2-Ultra NX graphics engine.
• Next-Gen LPDDR6 Memory: The handset is among the first commercial smartphones equipped with ultra-fast LPDDR6 RAM, achieving memory bandwidth up to 113.8 GB/s.
• HyperOS 4: Powered by Android 17, the software layer features rebuilt multitasking docks, seamless window resizing, and intelligent split-keyboard profiles designed specifically for the 7.58-inch inner panel.

For the first time at IFA 2026, we're showcasing our latest in-house designed Xiaomi XRING chips, which will help power AI across Xiaomi’s complete ecosystem.

Xiaomi 18 Fold will be the first flagship product to feature our Xiaomi XRING O3 chip.

See both tomorrow, 10:30… pic.twitter.com/B0Jpa2lpVp

— Xiaomi (@Xiaomi) September 2, 2026

Xiaomi 18 Fold: Expected Specifications & Architectural Shift

Hardware Feature	Previous Generation (Mix Fold Baseline)	Xiaomi 18 Fold (Confirmed / Previewed)
Cover Display	6.56-inch Narrow (21:9 Aspect Ratio)	5.38-inch Compact Wide Aspect Ratio
Inner Main Display	8.03-inch LTPO2 OLED	7.58-inch Book-Ratio LTPO OLED
Processor	Qualcomm Snapdragon 8 Gen Platforms	In-House Xiaomi XRING O3 (3nm, 10-Core)
Memory Standard	LPDDR5X RAM	Next-Gen LPDDR6 RAM (Up to 16GB)
Optics Co-Engineering	Triple Leica Camera Array	Triple Leica System (Slim Horizontal Visor)
Battery & Charging	~4,800mAh–5,000mAh, 67W Wired	6,000mAh Battery, 67W Wired + 50W Wireless
Ingress Rating	Splash Resistant	IP68 Dust and Water Resistance (Tipped)
Operating System	HyperOS (Android 14 / 15)	HyperOS 4 based on Android 17

Triple Leica Camera and Human × Car × Home Integration

The rear design features a clean, horizontal camera visor across the upper backplate, housing three high-resolution imaging sensors co-developed with Leica:

• Main Sensor: High-resolution primary camera equipped with Optical Image Stabilization (OIS) and Leica Summicron optical coatings.
• Auxiliary Lenses: Dedicated ultra-wide shooter and a periscope telephoto sensor supporting extended optical zoom and macro close-ups.
• Leica Color Profiles: Delivers Leica Authentic and Leica Vibrant color tuning, alongside classic monochrome street photography presets.

Beyond standalone imaging, the 18 Fold serves as a central interface for Xiaomi’s Human × Car × Home ecosystem. Through HyperOS 4, the foldable connects seamlessly to Xiaomi’s electric vehicle lineup-allowing owners to project the center console display, stream rear-seat media, and manage home automation hubs directly from the unfolded screen.

6,000mAh Battery and September 7 Launch Window

To support both displays throughout a full workday, the Xiaomi 18 Fold incorporates a dual-cell 6,000mAh silicon-carbon battery-representing one of the largest power capacities ever fitted inside a book-style foldable. Charging speeds include 67W wired fast charging and 50W wireless charging.

Xiaomi will officially launch the device during a comprehensive hardware keynote in China on September 7, 2026, alongside its next-generation tablet lineup and automotive ecosystem updates. International availability and global pricing will be revealed in the weeks following the domestic debut.