Xiaomi changes the Redmi Note 4’s chip set from a Mediatek Helio X20 to a Snapdragon 625 and therefore starts international sales. This reform results in new network frequencies and slight changes of the exterior. We tested the Xiaomi Redmi Note 4X in great detail for 10 days. Is the new Redmi Note 4X a real update to the Redmi Note 3 Pro? The answer to this question and more you’ll see in the following review.

Versions and overview

All Xiaomi Redmi Note 4 versions with Snapdragon processors (3 versions) are identical, except for the supported network frequencies and apparently the Bluetooth standard (4.1 and 4.2). The Xiaomi Redmi Note 4X supports all frequencies as well as the Xiaomi Redmi Note 4 International (4X International), or however you may call it.

Xiaomi Redmi Note 4X Xiaomi Redmi Note 4 Global Version Xiaomi Redmi Note 4 India
GSM (2G) 850/900/1800/1900 850/900/1800/1900 850/900/1800/1900
UMTS (3G) 850/900/1900/2100 850/900/1900/2100 850/900/1900/2100
LTE (4G) 850/1800/2100/2600 800/850/900/1700/1800/2100/2600 850/1800

Design and build quality

With the Xiaomi Redmi Note 4X, Xiaomi says goodbye to the uni-body metal casing of the Redmi Note 4 (China, MTK). At the top and bottom you can find once again two plastic tops, as it was the case with the Redmi Note 3 Pro. In terms of material and premium feeling, the casing finds itself between the Redmi Note 3 Pro and the Redmi Note 4 (Mediatek). It feels better while holding it in the hand and it leaves a more high-quality impression than a Redmi Note 3 Pro, thanks to the slightly rounded off 2.5D glass on the front. The Xiaomi Redmi Note 4X has a dimension of 151x76x8.45mm. It is 0.1mm thicker than the Mediatek Redmi Note 4. With its weight of 165g it is also 10g lighter.

Design and build quality

Protective covers for the Redmi Note 4 (Mediatek) should easily fit the Redmi Note 4X as well, considering the dimensions. However, the sensors are placed slightly differently. This means that neither protective covers nor screen protectors fit perfectly. Honorbuy.com already offers a screen protector and a cover for Europe. Gearbest also provides fitting screen protectors and covers.

Design and build quality Design and build qualityXiaomi Redmi Note 4X 4 International 6Design and build quality

The bezels are quite slim with 3mm. There is a RGBW notification LED at the top which shines in all possible colours. The Xiaomi Redmi Note 4X has the common Android sensor keys which are illuminated. The camera fits perfectly in the rear side and the fingerprint scanner can be found below the camera. Unlocking the phone from stand-by happens very precisely and fast. The 4100mAh battery is built-in and can be changed only with some difficulties.

Design and build quality Design and build quality

The Xiaomi Redmi Note 4X can be used with either two SIM cards or one SIM and one micro-SD card for storage expansion (up to 128GB). The audio jack is located at the top next to an infrared sensor and a second noise-cancelling microphone. At the bottom, you can find an “old” micro-USB port. All in all, the Xiaomi Redmi Note 4X’s build quality is on an elevated level, although the two plastic tops of the Redmi Note 3 Pro are back.


The Redmi Note 4X houses a 5.5-inch IPS display with a resolution of 1920x1080pixels and a pixel density of 401ppi. Xiaomi presents a textbook example of a full-HD display. All contents are pin-sharp and stay almost unchanged from any viewing angle and the colour representation is mostly accurate. In the settings you can choose between 3 colour modes and activate automatic contrast as well. Readability outside is good. The slightly rounded off 2.5D glass is scratch and fingerprint resistant, although Gorilla Glass is not mentioned. The surface feels excellently when exploring it with the finger.

Display Display

The popular SmartWake function (double tap on the display to wake it up) can be found in the options menu in the section ‘display’. The 10-point touch is fast and precise. It is perfect for those who write fast and a lot; SWIPE users especially will love the display surface.


Xiaomi Redmi Note 4X Speicher Geschwindigkeiten

The Xiaomi Redmi Note 4X offers a 64-Bit octa-core Snapdragon 625 processor. We already know this processor from the Lenovo P2 and the Redmi 4X’s little brother, the Redmi 4 Prime/Pro. The 8 Cortex-A53 cores clock a maximum 2GHz and in combination with 3GB of RAM and an Adreno 506 GPU, they supply quite a bit of power. In daily use, you do not notice any big difference to the Helio X20 version, but you do in terms of gaming. The Note 4X’s Adreno 506 GPU gets significantly better results than the Note 4’s Mali T-880 GPU. However, there are no big differences to the Redmi Note 3 Pro’s Snapdragon 650 processor in terms of gaming. The Xiaomi Redmi Note 4X can deal with demanding 3D games as well and the system with MIUI V8 is fast and fluent as usual. Nevertheless, the 4X is slightly slower in the system than the Redmi Note 3 Pro. However, you only notice this in direct comparison.

Antutu Result Geekbench Multi Result Geekbench Single Result 3D Mark Result

The 32GB storage reaches a reading/writing speed of 222/80MB/s. The RAM (3GB) secures enough power for multitasking and it has a speed of 6.7GB/s. Heat development is perfect even when performing demanding tasks; the Redmi Note 4X does not get any warmer than 38°C.

MIUI on Xiaomi Redmi Note 4X

MIUI V8 has been described in great detail in many reviews before, so here’s the short version: the system was strongly adjusted and it can be customized completely in terms of appearance. There is no app drawer (overview of all apps), so every app can be found on the home screen. MIUI provides excellent options to organize apps in folders; no other system can keep up with MIUI concerning this matter. Another feature is cloning, meaning that if you use 2 SIM cards, you can use WhatsApp for example twice. In order to do that, you do not need an additional app. You can also create a second system (second space). More information concerning the MIUI system can be found in the Xiaomi Redmi Note 4 review.

Xiaomi Redmi Note 4X System MIUI 1 Xiaomi Redmi Note 4X System MIUI 3 Xiaomi Redmi Note 4X System MIUI 2

MIUI runs impressively fluently on the Redmi Note 4X. When installing apps, you notice a slight difference to high-end smartphones, which are noticeably faster. However, everything opens fast, as you may expect of a middle-class device. Xiaomi, as usual, provides great system performance!


Xiaomi’s weakest point stays the camera. The Mi5s’s camera has been significantly improved afterwards; it seems like the manufacturer didn’t really know what they were doing at the beginning. The Redmi Note 3 Pro has been advertised with 16MP because “the more megapixel, the better the image quality”. The Redmi Note 4X’s 13MP camera has been presented with the following justification: “bigger pixels lead to a better image quality”. This mainly shows one thing: Xiaomi does not know exactly what they are doing.

The Xiaomi Redmi Note 4X’s 13MP camera has an aperture of f/2.0. Considering the price range, the camera takes nice pictures in good lighting conditions. Sharpness is good, there are enough details and the colour representation is mostly accurate. Xiaomi’s camera app is clear and easy to use; at the same time, it offers individual settings options for pros. The autofocus reacts fast even with moving objects thanks to PDAF. There is almost no trigger time.

In comparison to its predecessor, images are a bit sharper, but otherwise nearly identical. However, there are clear differences in terms of images taken in low light. The Xiaomi Redmi Note 4X does a slightly better job, but it’s not perfect either. Concerning video recordings, the Redmi Note 4X still has significant problems with optics and sound. Currently, we cannot recommend the Redmi Note 4X for video lovers. Those who take occasional selfies will be pleased with the front camera.

Connectivity and communication

The Redmi Note 4X supports all 2G and 3G frequencies.

GSM 850 MHz, GSM 900 MHz, GSM 1800 MHz, GSM 1900 MHz, W-CDMA 850 MHz, W-CDMA 900 MHz, W-CDMA 1900 MHz, W-CDMA 2100 MHz, LTE 850 MHz, LTE 1800 MHz, LTE 2100 MHz, LTE 2600 MHz, LTE-TDD 1900 MHz (B39), LTE-TDD 2300 MHz (B40), LTE-TDD 2500 MHz (B41), LTE-TDD 2600 MHz (B38)

Voice quality and reception of the Redmi Note 4X are simply outstanding.

Bluetooth 4.2 as well as the latest Wi-Fi standard with dual-band n-standard are available. Wi-Fi range and throughput are perfect. Xiaomi does not make any compromises in terms of sensors. The phone provides an acceleration, a brightness and a gyroscope sensor as well as a compass.

Compared to the Redmi Note 3 Pro, the speaker was not noticeably changed. I think both sound identically and therefore, they are good average. However, when headphones are connected, the Xiaomi Redmi Note 4X has a slightly better sound in terms of volume and quality.

Xiaomi Redmi Note 4X GPS Test Fix

The ‘battery monster’ Xiaomi Redmi Note 4X’s navigation is precise and stable and can be used for a long time. Within seconds, the phone determines the position up to 2-3m precise and stays stable when driving as well. There were no deviations in the course. The pedestrian navigation also worked perfectly with the integrated compass.

Battery life

Xiaomi Redmi Note 4X Akkutest

The Xiaomi Redmi Note 4X’s battery life is outstanding. The 4100mAh battery in combination with the Snapdragon 625 processor provides a battery life, with which at most the Lenovo P2 can keep up. During the test, I got 3 days of use with a DOT (display-on time) of 6.5hours (dual-SIM activity, Bluetooth, occasionally GPS). I don’t think that anybody manages to run down the Redmi 4X’s battery in one day. In order to achieve that, you have to use intensely GPS and mobile internet (e.g. using the navigation during an 8-hour drive and simultaneously streaming YouTube videos in FHD). Joking aside, the battery life is even better than the Redmi Note 3 Pro’s battery life and therefore, it is unique considering the price range and the overall performance.

Battery lifetime Result Unit: hours

However, there is a thing which might disturb some users, but in reality is not too bad. I am a big fan of quick-charge, and when I am about to go out, I plug in my phone for about 15 minutes and I get enough power for the day. The Redmi Note 4X does not have quick-charge. When the capacity is between 20 and 80%, you get 10% added in 15 minutes. The battery is fully charged in about 3 hours.

Design and build quality 0:1

The difference it makes in your hand is the most striking aspect here. Although the plastic tops are back, the curved metal frame gives a way more pleasing feeling. The intersections to the plastic are better built. And also there is the Redmi Note 4X’s 2.5D glass.

Display 0: 2

The reason for the score for Xiaomi Redmi Note 4X is the 2.5D glass and the unbelievably smooth surface.  Here, too, the Redmi Note 3 Pro can’t keep up. Also the whole display representation in default settings is a bit better.

Performance 1: 2

Redmi Note 3 Pro is a little faster than the Redmi 4X. Actually this is a no-go for a successor, but more about this in the following. The score for gaming performance and system speed goes to Redmi Note 3 Pro. However, there is not too big a difference.

System  2 : 3

Both devices run with up-to-date MIUI versions fluently and stable

Camera 2 : 4

In direct comparison Redmi Note 4X’s pictures are a bit sharper, but you can’t really detect a clear difference. You notice an improvement towards Redmi Note 3 Pro in bad light conditions. Here the Redmi Note 4X obviously is better, but all in all the Redmi Note 4’s camera isn’t really a selling strategy. Nevertheless the score goes to  Redmi Note 4X, even though only with a close lead.

Communication and connectivity 3 : 5

Excellent with both devices – identical sensors

Battery 3 : 6

The Redmi Note 3 Pro is a real monster in terms of battery life. This is what every owner can confirm. It is awesome that Xiaomi raised the battery life with updates. Still the Redmi Note 4X performs even better with the power saving – but weaker – Snapdragon 625. The increase in battery life is 15-20% towards the Redmi Note 3 Pro.

Price-performance 3 : 7

As a comparison we take the recent prices on the market of international (Band 20) versions and not the prices by Xiaomi, which only once in a while occur with very good offers. Therefore we have an average price of 170$ for the Redmi Note 3 Pro and 200$ for Redmi Note 4X. Only 30$ more for the Xiaomi Redmi Note 4X are fully justified in our opinion.

Availability 4 : 8

Since the Redmi Note 3 Pro is not being produced anymore we are already done in terms of availability. However you can’t say that the availability of Redmi Note 4X International is good, either.


Is Xiaomi Redmi Note 4X an upgrade to Redmi Note 3 Pro users? Here we can answer with a clear NO. should you buy a Xiaomi Redmi Note 4X International at the moment? YES AND NO. 200$ are not a bad price at all for this device and price-performance-ratio is excellent as well. Those who are willing to wait for 1-2 months will be able to purchase this device even cheaper

Conclusion and alternative

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Jonas Andre:

With the Xiaomi Redmi Note 4X, Xiaomi tries to make the Redmi Note 3 Pro’s strong points even stronger rather than to improve the weak spots. The outstanding battery life is improved again. The already solid casing is also improved. However, the camera stays mediocre and the processor performance is lowered. I do not understand why Xiaomi did not use a Snapdragon 652/653.
Buying the Xiaomi Redmi Note 4X, you get an up-to-date smartphone for less than 200$, which gives the competition a harder time than ever. The build quality is on the highest level with a 2.5D glass surface. That really is special in this sector. Despite lower benchmarks, the gaming performance is better than with the Redmi Note 4 and the heat development can convince as well. The overall performance with MIUI V8 is awesome and can keep up with smartphones that are more powerful as well. The battery life is one of the best ones on the market. Taking into consideration the 4100mAh battery, the casing is not even very thick. When recording videos, the Note 4X has struggling with quality and sound. The speaker is mediocre and unfortunately, quick-charge is not available.
A 5-inch alternative to the Redmi Note 4X is the Redmi 4X. Otherwise, for up to 200$, there is no reason to buy another 5.5-inch phone than the Redmi Note 4X.

  • Design and build quality 90 %
  • Display 100 %
  • Performance 100 %
  • Camera 80 %
  • Communication and connectivity 90 %
  • Battery 100 %

Price comparison

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*Prices include shipping and toll. Intermediate changes of prices, ranking, delivery time and costs possible. Prices last updated on 21.01.2019

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