Xiaomi now steals the spotlight from both Samsung and HONOR (with the Galaxy Z Fold6 and Magic V3) by introducing the fourth iteration of their book-style foldable, the MIX Fold 4.

Surprisingly, the Chinese brand did NOT skip the “4” naming scheme unlike other Chinese brands do.

ICYMI: 4 has always been associated with the word “death” in the Chinese culture — much like “13” and its bad omen in the Western culture.

Thinner than ever

The Xiaomi MIX Fold 4 undergoes the biggest change in the company’s foldable portfolio so far.

Graphics by Vincenz Lee | GadgetMatch

From last year’s 10.96mm, Xiaomi has managed to make their fold even thinner at just 9.47mm — making it the world’s second thinnest book-style foldable just after the recently-released HONOR Magic V3 at 9.2mm.

It’s then followed by HONOR (again) with the Magic Vs3 (9.8mm) and Magic V2 (9.9mm). Other brands are simply over the 10mm mark — much like its predecessor and the “fresh” offering from Samsung.

It’s all thanks to MIX Fold 4’s All-Carbon Architecture where the hinge floating plate, display backing plate, and middle plate battery compartment are all precision-molded from a carbon-fiber material dubbed as “T800H”.

Xiaomi also took a different approach in terms of hardware design. The MIX Fold 4’s three-layer, five-surface motherboard design plus high-precision soldering significantly improves circuit stability and reliability.

Graphics by Vincenz Lee | GadgetMatch

Its hinge is also upgraded to an ultra-strong 1800MPa steel that can withstand up to 500,000 folds and has SGS reliable folding certification altogether. Additionally, its mid-frame uses aluminum alloy.

The durability talk doesn’t stop there. Both of its displays are protected by Xiaomi’s Shield Glass for the outer screen and the flexible UTG (Ultra Thin Glass) inside.

Its back is made of composite fiber — woven with S2 premium glass fiber on a base of aramid and ceramic fiber. This makes the MIX Fold 4 pleasant to hold and resistant to abrasion and water.

Speaking of resistance to water, the MIX Fold 4 finally has an IPX8 rating to make it durable even in rain or when using with wet hands.

MIX (Un)Folded

When you unfold the MIX Fold 4, it shows the 7.98-inch E7 LTPO foldable display with an adaptive 1~120Hz refresh rate. This inner screen also uses the Pol-less Plus tech which enhances brightness and color reproduction but with reduced power consumption.

Folding it reveals the 6.56-inch C8+ panel with 120Hz refresh rate. Both screens support DCI-P3 wide color gamut, HDR10+, and Dolby Vision.

Graphics by Vincenz Lee | GadgetMatch

As expected, the Xiaomi MIX Fold 4 runs the latest and greatest SoC from Qualcomm — Snapdragon 8 Gen 3 with Adreno 750 graphics.

It comes in either 256/512GB or 1TB UFS 4.0 storage options. That’s coupled with either 12/16GB of speedy LPDDR5X memory.

Graphics by Vincenz Lee | GadgetMatch

As for battery, it’s equipped with an unusual 5100mAh stacked-cell battery that fills in the extra spaces in the fold. This is also based on a new-gen Silicon-Carbon (Si/C) tech.

Its 67W HyperCharge and 50W wireless charging standards both remain unchanged just like 2023’s MIX Fold 3.

If you’re worried about heat, the MIX Fold 4 boasts a large 11,912 m² of cooling system with advanced VC (vapor chamber) tech and 3D cooling system to quickly dissipate heat and prevent heat buildup even in the most extreme tasks.

Graphics by Vincenz Lee | GadgetMatch

The MIX Fold 4 runs Xiaomi’s HyperOS based on Android 14. With its foldable form factor, AI features such as Live Translate can be helpful when traveling.

And talking about travel, the latest MIX fold now supports two-way satellite connectivity. It also has the Surge T1 signal enhancement chips as well as support for an even faster (and future-proof) 5G-A data connectivity and Wi-Fi 7.

Full-Fledged Cameras on a Fold

On paper, the MIX Fold 4 is the only 2024 foldable so far that possesses a quad-camera setup.

The headliner has got to be its new 50MP f/1 .7 main (wide) camera based on the Light Fusion 800 sensor. This sensor also has a first of its kind “Dual Native ISO Fusion Max” tech that gives a more accurate color reproduction and better detail retention in high-contrast scenarios.

There’s also a 12MP f/2.2 UWA (ultra-wide angle) lens with a 120-degree FoV (Field of View).

The other two lenses are the 50MP f/2.0 floating telephoto lens with 2x optical zoom — mostly ideal for portraits and macro shots. Finally, there’s the additional 10MP f/2.9 periscope telephoto shooter with a farther 5x optical zoom (115mm equivalent).

As expected, Leica partnership remains for this device — much like how it was introduced in the MIX Fold 2 two years ago. Other than usual Leica color calibration and software addition, its cameras use Leica Summilux optics much like the Xiaomi 14 series.

Lastly, there’s the identical 16MP f/2.2 selfie cameras in and out.

Pricing and Availability

Xiaomi’s MIX Fold 4 comes in four color choices: white, black, blue, and a special Composite Fiber Edition.

Graphics by Vincenz Lee | GadgetMatch

It comes in three options — same pricing and configuration as the HONOR Magic V3.

• 12+256GB = CNY 8999 (US$ 1237 / EUR 1143 / GBP 966 / SG$ 1669 / PhP 72,115 / INR 103,287)
• 16+512GB = CNY 9999 (US$ 1374 / EUR 1270 / GBP 1073 / SG$ 1854 / PhP 80,129 / INR 114,765)
• 16+1TB = CNY 10,999 (US$ 1512 / EUR 1396 / GBP 1180 / SG$ 2040 / PhP 88,142 / INR 126,243)

Global availability was not announced. We still have to wait if Xiaomi will sell the MIX Fold 4 outside their home turf.