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Xiaomi unveils Xiaomi MIX Fold 4 and Xiaomi MIX Flip
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Xiaomi held the 2024 Lei Jun Annual Speech at the ShouGang Stadium, officially launching the new Xiaomi MIX lineup. Xiaomi has achieved further innovation in foldable phones, thanks to comprehensive technology covering materials, structure, and network functionality. Both products set new industry standards, with Xiaomi MIX Fold 4 offering core innovations in overall architecture, hinge, and battery. Additionally, it has been designed exceptionally thin without compromising strength or configuration. Also launched, Xiaomi MIX Flip excels in performance, battery, and network functionality, meeting standards of non-foldable phones and breaking the stereotype of flip phones offering reduced overall capabilities. With its sizable external display and innovative interactivity, most daily operations can be performed smoothly on the external display without opening the device.
Xiaomi MIX Fold 4: Three major breakthroughs.
New achievements in weight and versatility.
As a leader in lightweight foldable smartphones, Xiaomi has integrated years of accumulated experience into developing Xiaomi MIX Fold 4. This incredible device has made significant breakthroughs, defying the common assumption that foldable smartphones are heavy or inconvenient.
Three Key Technologies, Lightweight Design
The new generation of Xiaomi's proprietary hinge has achieved remarkable weight reduction and compact breakthroughs. Using high-strength materials paired with a wear-resistant carbon ceramic steel transmission mechanism has improved hinge reliability. Overall thickness and weight have been significantly reduced, with the total hinge volume reduced by 34%². The new design has an unfolded thickness of just 4.59mm¹ and a folded thickness of 9.47mm¹. This design breakthrough provides users with an unprecedented, lightweight experience.
For the first time, Xiaomi MIX Fold 4 fully adopts "all-carbon architecture". The hinge floating plate, display backing plate, and middle plate battery compartment are all precision-molded from T800H carbon fiber material. This significantly enhances overall strength and durability and considerably reduces weight. Carbon fiber's excellent tensile performance and reliability provide users with a safer and more lightweight experience, showcasing Xiaomi's innovative capabilities in optimizing material technology.
Xiaomi MIX Fold 4 has achieved several technological breakthroughs in manufacturing processes. The innovative three-layer, five-surface motherboard design combined with large-area tin spraying technology achieves high-precision soldering, significantly improving circuit stability and reliability. Additionally for the first time, application of three-dimensional shaped battery technology and three-dimensional stacking process utilizes irregular space in the motherboard COP packaging area, increasing battery capacity by 260mAh to 5100mAh. These precise manufacturing processes advance manufacturing technology and provide users with longer-lasting battery life experience.
Exceptional performance, long-lasting battery, strong network functionality, and overall excellence
Featuring the latest Snapdragon® 8 Gen 3 Mobile Platform and innovative 3D cooling system, the large-area cooling system measures 11,912 square millimeters¹. It uses advanced vapor chamber technology to quickly dissipate heat, which is then evenly distributed through multiple layers of graphite, effectively preventing heat buildup. The robust performance combined with excellent cooling ensures sustainable performance even under high load.
In terms of battery, the 5,100mAh high-capacity battery features new-generation silicon-carbon anode technology, enhancing energy density. The self-developed Xiaomi Surge battery management system controls charging and discharging processes, effectively extending battery life, while 67W wired charging and 50W wireless charging balance fast charging with battery health. The new generation E7 luminous material and Pol-less Plus technology offer low-power consumption by the display, helping users ease battery anxiety.
In terms of network functionality, Xiaomi MIX Fold 4 is equipped with powerful antenna architecture, including four industry-leading low-frequency receiving antennas and four Xiaomi Surge T1 signal enhancement chips. This is deeply integrated with the Xiaomi HyperOS network subsystem to ensure smooth communication in various holding positions and usage environments. Xiaomi MIX Fold 4 also supports two-way satellite communication, providing connectivity even in remote areas without cellular signal coverage. It fully supports mainstream global communication bands and includes a "Travel Assistant" feature to provide convenience for frequent travellers.
Xiaomi MIX Fold 4 comes with two top-tier flagship displays. The inner display features a 7.98-inch Samsung E7 LTPO panel with a resolution of 2488x2244, supporting a 1-120Hz adaptive refresh rate and HDR10+ for unparalleled visual effects. The outer display is a 6.56-inch C8+ panel with a resolution of 2520x1080, which also supports a 120Hz high refresh rate and a P3 color gamut display. The inner display uses advanced Pol-less Plus technology, significantly reducing power consumption while enhancing brightness and color performance, ensuring the best visual experience possible in unfolded and folded states.
Both Xiaomi MIX Fold 4 displays support Dolby Vision® technology, providing users an extreme HDR experience. Dolby Vision® enhances brightness and contrast, bringing more color layers and details, making each frame vivid. Users can enjoy cinema-grade visuals, whether watching movies or even video calls.
Quad camera system with Leica Optical Lens and Master Portraits
Xiaomi MIX Fold 4 features a Leica optical quad-camera system covering all focal lengths. Despite the device being thinner and lighter, its imaging capabilities have been significantly enhanced. The main camera uses a new 50MP Light Fusion 800 high dynamic range sensor, introducing "Dual Native ISO Fusion Max" technology for the first time in Xiaomi's foldable products. This technology provides more accurate color reproduction and better detail retention in high-contrast scenes. The 12MP ultra-wide-angle lens offers a 120° field of view, while the 50MP Leica floating telephoto lens delivers excellent portrait effects and macro photography capabilities. The 115mm Leica ultra-telephoto lens, with a periscope structure, also supports close-up shooting. These four lenses work perfectly, achieving seamless coverage across all focal lengths.
The innovative Xiaomi AISP, powered by Snapdragon 8® Gen 3's processing power and the Xiaomi HyperOS AI, with up to 60TOPS AI processing speeds, supports complex imaging scenarios. The new "Master Portrait" combines the power of PortraitLM and aesthetics learned from real-life photographers, offering a look "a little more ideal than reality," enhancing portrait beauty without deviating from reality.
Xiaomi MIX Fold 4 adheres to Leica's natural color science and classic tones, avoiding excessive sharpening and algorithms. Two Leica photographic styles with customizable features meet professional creative needs. The unique foldable form brings new shooting possibilities: hands-free hover selfies and external display framing when unfolded, transforming the flagship foldable phone into a portable professional imaging studio. This showcases Xiaomi's deep integration of foldable display and imaging technology.
Regarding smart experience, Xiaomi HyperOS is deeply optimized for large-display scenarios and adds multiple AI functions. Innovations such as the AI conference assistant, multimodal capabilities, and AI integration in system applications comprehensively enhance user productivity and operational convenience.
Reliability has been further improved with Xiaomi MIX Fold 4 using Xiaomi's composite fiber, providing sturdiness like never before. The mid-frame uses 6M42 aluminum alloy, significantly increasing strength; the outer display is equipped with Xiaomi Shield Glass, and the inner display uses UTG ultra-thin flexible glass, providing all-around display protection. The hinge is upgraded with 1800MPa ultra-strong steel, accounting for 82.6% of the hinge, with an opening and closing lifespan of 500,000 times², and has received SGS reliable folding certification. Xiaomi MIX Fold 4 also introduces the new Xiaomi Guardian Structure, woven with S2 premium glass fiber on a base of aramid fiber and ceramic fiber, offering excellent abrasion resistance, overall strength increased by 15%² compared to the previous generation, featuring a sturdy, wear resistance, and a pleasant hand feel.
Xiaomi MIX Flip: Reaching the peak of flip smartphones
Xiaomi is a newcomer in the compact foldable market, but features exceptional capabilities. Xiaomi MIX Flip leverages Xiaomi's years of technological experience to create a compact foldable device. It achieves breakthroughs in performance, battery life, and network functionality, even when compared to traditional flagship devices.
A highly functional flagship outer display
Outer display on flip devices have evolved from small to full display, but seamlessly using daily applications via the outer display required additional efforts. Xiaomi MIX Flip features a 4-inch All Around Liquid outer display with a quad-curved design, providing a smooth hand feel. The outer display interaction has been restructured, allowing it to function as a highly functional "compact phone" without opening the device.
Based on the new display form and popular daily scenarios, Xiaomi HyperOS completely reimagines outer display features, making it possible for the outer display to meet most daily usage needs. Xiaomi MIX Flip outer display inherits the comprehensive display gestures and notification/control center swipe-down interaction logic of everyday flagships, with almost no learning curve. It supports auto-rotation, is suitable for both left and right hands, and features a full-display keyboard nearly as wide as the inner display for comfortable typing. Over 200 of the most popular applications run perfectly on the equivalent 3.5", 16:9 main application area, covering communication, entertainment, health, reading, shopping, and learning apps. Thanks to the flexible framework of Xiaomi HyperOS, applications display without obstructions or cropping, offering a smooth experience. Innovative partition design allows widgets to display time, weather, step count, music control, and recently used apps during daily use. In scenarios like calling taxis, food delivery, flights/trains, widgets will automatically switch to focus notification display, updating status information in real-time.
This outer display integrates deeply with the「Human x Car x Home」eco-system. AI, Xiaomi EV, and Mi Home apps are deeply adapted to the outer display scenario, allowing users to manage personal daily affairs and control the status of their Xiaomi EV's and smart home devices. The Xiaomi HyperMind intelligent learning center is also adapted to the outer display, learning and recording users' smart home device usage habits and proactively executing them. AI Input Assistant, integrated into the outer display input method, can help users refine or generate text as needed, making text creation easier.
Many compact foldable products only support hands-free calls when closed, which users often criticize. Xiaomi MIX Flip addresses the three core issues with a holistic approach, ensuring excellent call quality whether open or closed:
- Signal strength: Xiaomi MIX Flip's antenna hardware architecture, combined with the intelligent tuning capabilities of the Xiaomi Surge T1 signal enhancement chip and grip recognition algorithm, smartly selects the optimal antenna, avoiding weak signals.
- Audio output: Xiaomi MIX Flip uses a dual dipole system, with one sound unit equipped with a diaphragm for both the inner and outer displays, supporting earpiece calls when open or closed. Leveraging the physical characteristics of the dipole speaker system's "opposite phase cancellation," it supports privacy calls, preventing call voice from spreading externally and ensuring privacy in any state.
- An independent noise-canceling microphone near the hinge and the top-frame ensure call quality when closed.
True flagship performance when unfolded
Xiaomi MIX Flip is powered by the Snapdragon® 8 Gen 3 Mobile Platform, making it one of the few compact foldable devices using an up-to-date flagship chipset. To ensure comprehensive performance, Xiaomi has redesigned a 3D cooling system for Xiaomi MIX Flip: a large 3500mm² VC area with a unique "staircase" design that quickly dissipates heat from the SoC; heat is evenly conducted through double-layer graphite over the hinge, avoiding accumulation of heat. Xiaomi's SU7 "aerogel" thermal insulation material is used near the inner display side of the "staircase" structure, effectively blocking heat transfer to the display and improving the user experience when touching the display.
Xiaomi MIX Flip features Xiaomi's Surge battery with 6% silicon content in the negative electrode. It achieves an energy density of 780Wh/L and an ultra-high capacity of 4780mAh, surpassing the flagship Xiaomi 14. The Xiaomi Surge battery management system precisely manages the charging and discharging process, extending battery life. Combined with the battery's self-healing properties, it can maintain at least 80% capacity after 1600 cycles². This gives Xiaomi MIX Flip a battery life performance comparable to non-foldable models, alleviating battery anxiety for compact foldable users.
Xiaomi MIX Flip features Xiaomi's composite fiber material, providing sturdiness and protection. The middle frame uses the same 6M42 aluminum alloy as the MIX Fold 4, doubling the strength; Xiaomi Shield Glass and UTG ultra-thin flexible glass protect the outer and inner displays. The compact dual-link hinge's internal mechanism uses the same high-strength and wear-resistant materials as the MIX Fold 4, with a folding and unfolding lifespan of 500,000 times², certified by SGS reliable folding certification. It also offers a Xiaomi Nylon Fiber special edition of meticulously woven nylon fiber with excellent abrasion and stain resistance.
Leica imaging in your pocket
Xiaomi MIX Flip is equipped with Xiaomi x Leica next-generation Summilux lenses. The main camera uses the Light Fusion 800 high dynamic range sensor. It also features the unique 47mm Leica floating telephoto lens in a compact foldable device with a minimum focusing distance of 9cm. Xiaomi MIX Flip also incorporates the Xiaomi AISP large model computational photography platform, supporting advanced imaging scenarios with up to 60 TOPS of processing power. The new "Master Portrait" mode, based on the PortraitLM large model and guided by real-life photographers, enhances portrait beauty beyond reality while maintaining authenticity.
The compact body, large outer display, and foldable form bring unprecedented freedom to the imaging capabilities of Xiaomi MIX Flip. When closed, the large outer display can be used with the two Leica optical lenses for photography and video recording, and it even supports a makeup mirror mode, allowing users to check their makeup using the floating telephoto lens. When in hover mode, it eliminates the need for a tripod, making it suitable for group photos, video recording, and time-lapse photography. It also supports outer display preview while taking pictures, enabling others to monitor and adjust their status in real time when helping capture the shot. Xiaomi has also specially designed the "Xiaomi Photography Kit," which, when connected, allows for instant shooting and printing, capturing memorable moments.
The launch of Xiaomi MIX foldable series marks a new milestone, showcasing Xiaomi's effort to solve users' pain points and introduce new technology. It embodies Xiaomi's relentless pursuit of innovation and quality, promising an excellent user experience.
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