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review with features, price and specifications.

27 mayo, 2021

Where Xiaomi is strongest is in the mid-range, it’s no secret. To check it, we just have to take a look at its prolific Redmi series, where the maximum is the quality / price, but also the confusion. The Chinese firm has many terminals in this segment, some with many similar to each other. The latest to join the company’s offer in Spain is the Xiaomi Redmi S2.

It was announced in early May and Xiaomi has been in quite a hurry to bring it to more markets. We are talking about a terminal that follows the design line of the latest mid-range with an 18: 9 screen, which mounts the eternal Snapdragon 625 processor and gets on the dual camera bandwagon, offering portrait mode also in the front camera. What position does the Redmi S2 occupy in the Xiaomi catalog? It is not an easy question to answer, but we will try it in our analysis.

Xiaomi Redmi S2, technical characteristics



160.7 x 77.3 x 8.1 mm 170 g Plastic and glass


IPS 5.99-inch 18: 9 HD + (1,440 x 720, 269 dpi)


Snapdragon 625 octa-core 2 GHz GPU Adreno 506


3 GB


32 GB + MicroSD up to 256 GB


Android 8.1 Oreo + MIUI 9.5


12 MP + 5 MP, f / 2.2, PDAF, EIS, portrait mode, HDR auto, FullHD videos 30 fps


16 MP, LED flash, portrait mode, HDR auto, beauty mode


Dual SIM, LTE, WiFi, WiFi Direct, Bluetooth 4.2, GPS / Glonass / Beidou, MicroUSB, minijack, fingerprint reader


3,080 mAh


179 euros on Amazon for 164 euros

Design: plastic can also be premium

Xiaomi Redmi S2

As soon as I took the Redmi S2 out of the box I had a strong sense of déjà vu, and that is the design of this model is very reminiscent of other mid-range of the firm like the Xiaomi Redmi 5 Plus or the Redmi Note 5. Among the similarities we have the same 5.99-inch screen and elongated format or that chassis with rounded lines that hugs the edges of the terminal. Xiaomi maintains the same design language, but there is an important difference with its twins: the material.

The design is very reminiscent of the Redmi Note 5, but replaces the metal with a plastic chassis. Of course, the good finishes are maintained.

As we already saw with the Redmi Note 5A, the material selected to create the case of the Redmi S2 is not metal, but plastic. However, it is a detail that we only notice by touch since At first glance, the finish looks like the usual polished aluminum. The construction does not give it away either, which feels solid and with very good finishes. It is true that the connection between the screen and the case is different and does not have the usual rounded edge, but rather the transition is more abrupt. All in all, the feel in hand makes it clear that yes, plastic can convey that premium feel too.

Xiaomi Redmi S2

The change of material is just that, at the construction level we continue to have a fixed housing that does not allow us to access the battery, with the SIM / MicroSD tray on one side and the classic ports and buttons in exactly the same positions; buttons on the right side, microUSB and speaker below and minijack above.

It also coincides with metal mobiles in that its surface is very slippery, something that combined with its size makes handling not entirely comfortable and very uncomfortable if it is with one hand. As usual, Xiaomi includes a transparent silicone sleeve It helps improve grip while protecting from scratches.

Xiaomi Redmi S2 Being plastic, in theory you don’t need antenna lines, but there they are.

There is a detail that we had not seen in other models and that is that the Redmi S2 has lines crossing the back that are reminiscent of the classic antenna lines. When we see this type of lines, it is usually in mobiles with aluminum casing since this material blocks the signal, but being plastic in this case it seems that it is a purely aesthetic addition. It doesn’t bother too much but there it is.

The vertical double camera protrudes enough so that the mobile is not straight when placed on the table.

On the back we also have the double camera that protrudes slightly from the chassis, a detail that it shares with many mobiles. In the Redmi S2 it does not bother excessively, but it is true that when placed on a flat surface it remains crooked. The advantage is that it doesn’t ‘dance’ when we touch it. In this case, the silicone cover is once again a good ally.

Xiaomi Redmi S2 Photo not suitable for freaks of symmetry and balance.

If we go to the front, as I said, Xiaomi continues on the path of the 18: 9 format with a 5.99-inch screen that has rounded corners, as the current trend marks. There is not a very marked reduction of frames, especially in the lower frame, which despite not having capacitive buttons or fingerprint reader is still much wider.







5.99 inch 18: 9 HD +

5.99 inch 18: 9 FullHD +

5.9 inch 18: 9 FullHD +

6 inch 18: 9 FullHD +

5.99 inch 18: 9 HD +








160.7 x 77.3 x 8.1 mm

158.5 x 75.4 x 8.05 mm

160 x 75.5 x 8 mm

162 x 76 x 8.1 mm

158.3 x 76.7 x 7.8 mm


170 g

180 g

167 g

155 g

164 g


3,080 mAh

4,000 mAh

3,200 mAh

3,000 mAh

3,000 mAh

If we face it with other models of a similar range, the Redmi S2 is more or less at the same level in terms of use of the front, so it cannot be penalized for that either. Here the insistence on keeping the default six inches is the main problem that the total size skyrockets.

The Redmi S2 is great, but the fault is not with the frames, but with that tendency to keep the six inches almost by default.

Where the Redmi S2 could improve a bit is in weight. It is not excessively heavy, but eliminating the metal and mounting a more measured battery than for example the Redmi 5 Plus, the feeling is that there was scope to reduce a few more grams.

Screen: cropping in resolution, but not in size

Xiaomi Redmi S2

We were talking about the screen size of the Redmi S2 making the reduction of frames not look like in terms of handling comfort, and it is that no matter how compact it is, six inches is a lot of inches and in this model it has not been compacted much either. The result is a fairly large terminal, bad news for small hands, but good news for the visual experience, right? Yes and no. It cannot be denied that the larger the viewing surface, the better the visual experience, but size is not everything, it must be accompanied by other factors that in the Redmi S2 they fall a bit short, starting with the resolution.

We have a six-inch screen in 18: 9 format, but the resolution remains in HD +. From somewhere you had to cut …

The Xiaomi Redmi S2 mounts a 5.99-inch IPS panel with HD + resolution, or what is the same, 1,440 x 720 pixels with a concentration of 269 dots per inch. They are acceptable figures that allow you to see the images with sufficient clarity, but the jump is noticeable with respect to a FullHD panel, so here we start from a slight disadvantage.

Brightness is the other pending issue. On the one hand, more intensity is missing outdoors, something common in the mid-range, but above all the main problem is that auto brightness system is very lazy And in many cases it goes like stumbling blocks. It is not a problem that penalizes excessively the experience but it can be something exasperating.

Performance: again the Snapdragon 625

Xiaomi Redmi S2

The love story between Xiaomi and the Snapdragon 625 dates back to the time of the Xiaomi Redmi Note 4. Ok, the mobile was announced in January 2017 (the version with Snapdragon), but at that time the processor had already been one year old . Now, the Snapdragon 625 has already had two years to spare and has been succeeded by other models from the 600 series.

Perhaps part of Xiaomi’s determination to continue integrating this chip is that it offers very good performance. I have tested several smartphones with the Snapdragon 625 and I can corroborate it. However, with the Redmi S2 it has been the first time that I have noticed that the fluidity was not as marked as other times. The arrival of Android Oreo with MIUI 9.5 may have something to do with it, but this Snapdragon 625 is not as thin as it used to.

The Snapdragon 625 is still a good option, but the fluidity does not shine as much as in other models and the lag shows the paw more times than expected.

Be careful because the terminal saves the usual day-to-day tasks without any problem, but I have encountered lag and some unexpected shutdown more times than was usual in other models. MIUI 9.5 and its gesture-controlled interface does not help too much, and it is that this function is very demanding and ends up penalizing the experience. However, I also cannot say that the performance has improved a lot when disabling them.

All in all, the Xiaomi Redmi S2 offers a good performance in the usual scenarios and lag is rather sporadic; it is even capable of moving heavy games. The 3 GB of RAM handles well in multitasking and its 32 GB background will be more than enough for most users (and if it is not, it accepts MicroSD). Before going to the table comparing the results of the benchmarks, also note that the rear fingerprint reader does not present any complaints, but is fast and accurate.






Snapdragon 625

Snapdragon 625

Kirin 659

Snapdragon 626


3 GB


3 GB








844 / 4,316

864 / 4,293


923 / 4,445

Autonomy: trimming milliamps

Xiaomi Redmi S2

At first we compared the design of this model with that of other models in the Redmi range such as the Redmi 5 Plus or Redmi 5 Note, and there are some obvious similarities with their older brothers, but autonomy is not one of them. The Redmi S2 mounts a 3,080 mAh battery, almost 1,000 mAh less than the Redmi it is inspired by. In practice, autonomy is in the average of other models with similar capacity, neither stands out nor does it stay below.

There are more cuts: despite maintaining a fairly generous size, the battery remains at 3,080 mAh, almost 1,000 mAh less than its older brothers in the Redmi series.

The battery usually gives for a day of use without problems, reaching the end of the day with a 15-20% load has been usual, although with more intensive use it may be necessary to refuel before returning home. If we talk about screen hours, the duration is usually around 4.5 or 5 hours, nothing …