Xiaomi adheres to modern trends and also deals with the production of folding devices. We recently published an exclusive review of their debut clamshell model, Xiaomi MIX Flip, which pleasantly surprised us in practically every way.
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As the only ones in Slovakia and the Czech Republic, we also have this year's flexible model available for review. Xiaomi MIX Fold 4". Looking at the list of parameters, it looks breathtaking. It amazes at the first contact. But is he so great in practice? The just-starting review will tell you Xiaomi MIX Fold 4".
Where to buy Xiaomi MIX Fold 4?
Xiaomi MIX Fold 4" we are together with Xiaomi MIX Flip ordered from our partner seller TradingShenzhen. The delivery has been made already within 10 days. Transport Global Priorities it will cost you a few euros and you will be pleased that you will not have to pay any additional customs fees or VAT.
Xiaomi MIX Fold 4 Chinese Version (with B20 LTE)
You do not pay any extra fees for Global Priority shipping.
We recommend choosing Global Priority transport, for which you will not pay extra. Customs fees and any VAT will be arranged for you directly by the seller. Shipping can only be selected in the cart, after entering the delivery address. Delivery with Global Priority usually takes about 15 days, but may take longer.
You do not pay any extra fees for Global Priority shipping.
We recommend choosing Global Priority transport, for which you will not pay extra. Customs fees and any VAT will be arranged for you directly by the seller. Shipping can only be selected in the cart, after entering the delivery address. Delivery with Global Priority usually takes about 15 days, but may take longer.
You do not pay any extra fees for Global Priority shipping.
We recommend choosing Global Priority transport, for which you will not pay extra. Customs fees and any VAT will be arranged for you directly by the seller. Shipping can only be selected in the cart, after entering the delivery address. Delivery with Global Priority usually takes about 15 days, but may take longer.
The fact that it is a Chinese version, which most likely will not even make it to the global market, did not deter us from buying it. The device is fully supported LTE band B20 and also the latest 5G network. You can also use it with our Slovak and European operators without any problems.
A Chinese ROM is installed on the device. This means that the software is localized in Chinese or English language. When we turned on the phone for the first time, we were taken directly to the system instead of the traditional initial setup screen.
The reason is that the seller turned on and installed the smartphone before sending it Google Play Services even with himself Play Store, which we rely on in Europe on Android devices. You can choose a blue, white or black color variant, while there is also a special "fiber" black color. Memory versions are sold 12 GB + 256 GB (tested by us), 16 GB + 512 GB or 16 GB + 1024 GB.
Technical specifications of Xiaomi MIX Flip
Model | Xiaomi MIX Fold 4" |
---|---|
dimensions | Open: 159.4 x 143.3 x 4.6 mm |
Closed: 159.4 x 73.1 x 9.5 mm | |
Weight |
226 g or 228 g |
Internal display |
Foldable LTPO OLED / 7.98 inches |
2224 x 2488 px / 418 ppi / 120 Hz / 1700 nits (HBM) / 3000 nits (peak) | |
External display |
LTPO AMOLED / 6.56 inches |
1080 x 2520 px / 21:9 / 120 Hz / 1700 nits (HBM) / 3000 nits (peak) | |
processor |
Qualcomm Snapdragon 8 Gen3 |
Graphics |
Adreno 750 |
Cameras |
50 MPx main camera | aperture f/1.7 | OIS | 23 mm | 1/1.49" | PDAF focusing |
50 MPx telephoto lens | aperture f/2.0 | OIS | 47 mm | PDAF focusing | 2x optical zoom | |
10 MPx telephoto lens | aperture f/2.9 | OIS | 115 mm | PDAF focusing | 5x optical zoom | |
12 MPx ultra-wide angle | aperture f/2.2 | 15 mm | 120° | |
16 MPx front camera (external display) | |
16 MPx front camera (internal display) | |
SD card |
NO |
3.5 mm jack | NO |
Infrared port | Yes |
NFC |
Yes |
Radio |
NO |
Drums |
5100 mAh |
Fast wired charging 67W | |
Fast wireless charging 50 W | |
Increased durability |
IPX8 |
Contents of the package
The box in which you Xiaomi Mix Fold 4 arrives, it is larger due to the non-traditional design of the smartphone. Compared to other packages, it is wider and thinner. Inside it is an open smartphone wrapped in foil. It is located below 67 W charging adapter with Chinese terminal and USB-A to USB-C charging / data cable.
The seller will also give you a European reduction. The accessories are in white. There is also a cover, which consists of two parts. The first protects the back, the second the front of the foldable smartphone. Before putting the covers on, you should peel off the protective tapes that protect the delicate adhesive. It serves to prevent the covers from coming loose from the thin edges of the smartphone.
Construction and design
Xiaomi MIX Fold 4" it clearly belongs to one of the thinnest folding smartphones on the market. In the open state, the sides of the device have only 4,59 mm. When the phone is folded, it will feel like a classic smartphone. It will reach thickness 9,47 mm, which is only slightly larger than the standard thickness of a typical mobile today.
competitive Honor Magic V3 it is a bit thinner and in the open state it has 4,4 mm, respectively 9,2 mm after closing. Its weight is 226 g / 228 g, depending on the color version. Water resistance certification is a nice insurance in case of an unfortunate accident IPX8. Xiaomi MIX Fold 4" should remain at a depth of 1,5 meters for 30 minutes.
It looks incredibly premium and futuristic in the hand. The sides are metallic and shiny. The back side is matte and, in our case, has a nice blue color with a small, subtle glitter effect. The upper part of the back hosts a rather large module with cameras. It is all glass and we were worried that it would pick up fingerprints.
However, this is not true because the areas outside the lenses themselves contain a fine texture that prevents the presence of dirt. Opposite Samsung Galaxy Z Fold6, which we could touch for a short while, has an effect Xiaomi more premium due to the thinner construction. Overall, we like the appearance and the processing of the Chinese puzzle better.
With its thickness (5,6 mm in a spread out a 12,1 mm in the folded state), however, the robustness and folding mechanism of the Samsung makes it seem stronger, but it does not feel nearly as great when holding as Xiaomi MIX Fold 4".
Samsung claims that its model will last without consequences 200 folding cycles. Xiaomi pushed the limit up to 500 000 despite the thinner construction. However, replacing the film on the internal display is easier in the case of the Samsung model, as it is also officially sold in our region and has its own official service here.
Place of bending on the internal display Xiaomi MIX Fold 4" it is visible, but during use it is quite negligible. It can also be felt, but it is clearly a step forward compared to previous generations. Almost no sounds are heard during bending.
It's worth noting that the large display inside is plastic and if mishandled, it can quickly show signs of use. For example, pay attention to fingernails, which can also visually damage the screen. It is a very delicate, precisely processed electronics.
Control elements in the form of volume buttons and the power button are still located on the right side of the device. This means that they are located on the right half of the unfolded smartphone, or on the bottom layer if the mobile is closed.
The power button also includes a fingerprint scanner, which is very fast and accurate. On the lower edge, located under the front display, there is a USB-C port, a grille for the main, loud speaker, which is of high quality and suitable for watching videos, and a microphone. The other lower edge has a slot for two nanoSIM cards. How the mentioned elements fit into such a thin construction is almost unbelievable.
On top Xiaomi MIX Fold 4" there is even an infrared port for controlling home electronics. The other half has an additional speaker on it to create a stereo output. We may have some reservations about more demanding opening. The phone is so thin that it is difficult to find a place from which you can easily open it. Even the magnet that holds the folded smartphone together is quite strong. But you get used to it.
displays
Let's start with the external display, which you will probably use more often, even though it probably won't be the center of attention. It has 6,56-inch diagonal, Full HD + resolution (1080 x 2520 pixels) with maximum brightness 1700 rivets (HBM), respectively equal 3000 rivets (peak). These are LTPO AMOLED panel sat 120 Hz refresh rate, display support HDR10 + content and technology Dolby Vision. It is slightly curved towards all four edges.
Xiaomi MIX Fold 4" he doesn't have to be ashamed of it, quite the contrary. It would also excel among traditional smartphones. It is excellent in all respects, including color reproduction. It has great viewing angles and a high response to touch. When you put the included case on the phone, the gesture to step back from the left side will be very difficult to perform, due to the shape of the plastic frame of the cover.
In most cases, the step back will need to be performed from the right side. It's a small thing, but it bothered us a bit. Of course, this problem does not arise without a cover, but this technological beauty needs to be protected.
After opening the device, you will see a large, 7,98 inch display, with resolution 2224 x 2488 pixels and the resulting density 418 ppi, which is more than sufficient even on such a diagonal. This one Foldable LTPO AMOLED the panel is as good as the outer one.
It features the same refresh rate 120 Hz, maximum luminosities 1700 rivets (HBM) a 3000 rivets (peak) and other qualities. Working or writing on such a large screen is great.
Certainly not every application works well at this aspect ratio, and some games in particular may have a problem. However, if we are not mistaken, we did not encounter a single problem and, for example, Instagram is already adapted for foldable smartphones.
The difference is in the number of supported colors. While the external screen can display up to 68 billion colors, the inner one reproduces 1 billion. In fact, we did not notice a significant difference. Xiaomi MIX Fold 4" it is equipped with high-end displays, which are one of its most important prides.
Performance
A folding smartphone Xiaomi MIX Fold 4" the best that the current market has to offer was indulged. The main role is the chipset Qualcomm Snapdragon 8 Gen3 s 12 GB, possibly up to 16 GB operating memory. We tested 12 GB execution. That much RAM is more than enough for today's times and more than 16 GB you definitely won't need it for the next few years.
The user interface runs as smoothly as possible and we didn't encounter a single stuck animation. The manufacturer optimized the software to perfection. During demanding multitasking or gaming, due to the extremely thin body, you will probably feel the heating, but it was not as noticeable as in the case of the model Xiaomi MIX Flip, which overheated during the 3DMark stress test. Xiaomi MIX Fold 4" it passed the same test and also showed higher scores across other benchmark applications.
We wondered if the phone would score higher in open benchmarks due to better heat dissipation. However, there were fewer points in that case, mainly because the graphics tests had to be rendered on a display with a higher resolution.
Operating system
Na Xiaomi MIX Fold 4" you will find a pre-installed operating system Android 14 with a graphical interface HyperOS in the Chinese version. This means that you can only use the phone in English. Chinese firmware can be used here, but you should emphasize several factors.
The first is the fact that notifications are sometimes delayed, in worse cases by tens of minutes. Notifications from popular chat apps, incl Messenger whether WhatsApp, show a delay of roughly 10-20 minutes.
Extreme cases occurred when the device was in idle mode for a long time. Back then, notifications didn't come at all until the screen turned on, or they arrived with hourly delays. But some days things worked perfectly, it's very variable. It is especially worth mentioning Slack, a team chat app. We received notifications from it very rarely.
Power optimization for background apps was turned off and we also enabled Autostart for problem apps, but that didn't fix the delayed notifications issue. The seller additionally installed Google Play Services into the system, so we wouldn't look for the problem in them either.
It is simply a Chinese ROM that comes with such a drawback. Alone HyperOS it is packed with useful functions and has some that are prohibited in our country, for example, recording phone calls. Some features are exclusive to China.
The pre-installed apps are mostly localized in Chinese and can be uninstalled. Compared to the global version of HyperOS, you won't find pre-installed games or social networks here. NFC payments work, just download Google Wallet from the Play Store, set it as the default payment app and you can start working normally with your phone.
Cameras
There is photographic equipment on paper Xiaomi MIX Fold 4" rich indeed. There are four cameras on the back. It is available 50 MPx main sensor with optical image stabilization. She is also present 12 MPx ultra-wide-angle lens with a 120-degree angle of view, 50 MPx 2x telephoto lens with OIS and 10 MPx periscopic telephoto lens with 5x optical zoom and also has OIS.
It is located on the front of the outer screen 16 MPx the camera and the internal display also have a front sensor with the same resolution. Together is available up to 6 cameras. How can you use them in practice? Pretty good. When taking photos, you can choose from two color profiles, Leica Authentic a Leica Vibrant.
The first mentioned mode produces less colorful, darker images with an emphasis on contrast. It occurs to us that in this case the mode tended to lose more detail, especially in the shadows, so in most cases we shot with the mode on Leica Vibrant.
Photos generally have a high contrast, which is why details in the darker areas of the images suffer in particular. The photos are a little softer and less colorful compared to the competition. However, if you are a fan of shots with colors that are close to reality, Xiaomi MIX Fold 4" it will not disappoint you with its results. All the sensors are very good, the 5x telephoto lens has also been better, but it still served well for photographing distant objects.
The phone handles high dynamic range scenes well. It can surprise even at night. We also tried the "Pro" mode for taking photos of the Milky Way. You can really work with a 30-second shutter for astrophotography as well. A RAW file is also generated, which you can then work with in editing programs.
We attach an image in jpeg format without additional modifications. By the way, if we don't write under the sample photo which Leica mode it is, the photo was made in "Vibrant" style. The differences are sometimes so minimal that it is not even worth adding a second photo. Video can be recorded in 4K at 60 fps or even in 8K at 24 fps.
Video recording
Battery and charging
Xiaomi MIX Fold 4" with mixed use and switching between the external and internal display, it will offer endurance at the level of approx 6 hours with the screen on. On less demanding days where we started with a full charge and had the screens on for 3 hours and 42 minutes, the phone still had 24% battery left after 46 hours.
So if you humble yourself and use the larger internal screen less, it can also be a reality 7 hours SOT (Screen On Time). In our case, it means for a comfortable, 1,5-day battery life on one charge. After an hour of watching a YouTube video on the indoor, flexible display, 9% of the power was used.
In the event that it is necessary to recharge the energy earlier, you will be pleased that the model supports fast, 67 W charging. There is also a fast, 50 W wireless power supply. In the table below you can see the broken down statistics from cable charging from 1% to 100%. When the charge level is low, you will be offered a hibernation mode, which will significantly extend the resulting endurance in case of emergency. Of course, its activation is also possible earlier than just before full discharge.
Hour |
Charge level |
---|---|
10 minutes |
21% |
20 minutes |
38% |
30 minutes |
58% |
40 minutes |
75% |
50 minutes |
89% |
58 minutes |
100% |
Connectivity
Folding model Xiaomi MIX Fold 4" boasts modern connectivity. It has everything that should be in the case of a premium smartphone. It's a Chinese model, so it's great that you can use it to connect to all the networks available here, including LTE band B20 or the most modern 5G networks.
It is also available Wi-Fi 7, Bluetooth 5.4, globally used GNSS services, and you can also use the infrared port to control home or office electronics, NFC or the USB-C connector, which is in version 2.0. Call quality and connection to the mobile data network was excellent (tested with SIMs from operators Orange, Radosť and 4ka).
The phone also features a satellite SOS system, but it only works with Chinese operators. But it is interesting that the satellite can be located in the sky here as well. The system will direct you to it.
Xiaomi MIX Fold 4: Final evaluation
Xiaomi MIX Fold 4" he pleasantly surprised us and interested not only us, but also our surroundings. This is mainly due to the premium, thin design, which is decorated with rounded edges of the display and a nice finish on the back. We are pleased that the construction is made of high quality and does not retain fingerprints or other dirt.
In the folded state Xiaomi MIX Fold 4" thanks to its minimal thickness, it looks like a traditional smartphone. The system is fast and smooth, the device does not heat up significantly in most cases, the displays are of high quality and readable even in direct sunlight.
The operating system has a disadvantage in the form of the absence of the Slovak language and often delayed notifications. However, China's HyperOS gets updates more often and earlier, if that's something you care about.
Good endurance and fast charging, which takes less than an hour, are also an advantage. If you can live with the mentioned disadvantages of Chinese firmware and you really like this new product, we definitely recommend buying it. The model will almost certainly not come to the global market, so this is a unique opportunity to get a unique smartphone that attracts attention.
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