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review with features, price and specifications

23 mayo, 2021

The Xiaomi Redmi 9 is one of the cheapest and simplest members in the company’s entry range. Younger brother of the Redmi Note 9 and Note 9S, but a step above the Redmi 9A and 9C, this mobile wants to conquer the price range of 100 euros.

We have analyzed it thoroughly to tell you everything about this phone, with highlights like a huge battery, as well as a finish that manages to enter very well through the eyes. So let’s see what this Redmi 9 offers and if it manages to compete in this low price range.

Xiaomi Redmi 9 data sheet

Xiaomi Redmi 9


IPS 6.53 “
Full HD +

Dimensions and weight

163.32 x 77.01 x 9.1 mm
198 g.


Helio G80


3/4 GB


32/64 GB

Frontal camera

8 MP

Rear camera

13 MP f / 2.2
8 MP f / 2.2 wide angle
5 MP f / 2.4 macro
2 MP f / 2.4 bokeh


5020 mAh
Fast charge 18W

Operating system

Android 10


Bluetooth 5.0


Rear fingerprint reader

Starting price

3 GB + 32 GB: 119 euros

4 GB + 64 GB: 136 euros

Xiaomi Redmi 9 - Smartphone with 6.53 FHD + Screen" DotDisplay, 4 GB and 64 GB, 13 MP Quad Camera with AI, MediaTek Helio G80, 5020 mAh Battery, 18 W Fast Charge, Purple

Xiaomi Redmi 9 – Smartphone with 6.53 “DotDisplay FHD + Screen, 4 GB and 64 GB, 13 MP Quad Camera with AI, MediaTek Helio G80, 5020 mAh Battery, 18 W Fast Charge, Purple

One of the most remarkable designs in its range

Img 8073 It is difficult not to fall in love with this Redmi 9, at least in blue.

The Xiaomi Redmi 9 is surprisingly pretty and eye-catching, at least in our unit of analysis in blue. Apart from being quite attractive, has a rough finish that suits you great. In fact, it is one of the best treatments we’ve seen for polycarbonate.

The Xiaomi Redmi 9 is quite clean. No fingerprints or hand grease lingers on the rear and the rough finish helps further improve grip

Barely picks up footprints, holds very well and it gives the feeling of being quite resistant. The phone is very ergonomic and its rounded corners help it not get stuck in the palm of the hand when we hold it. In addition, despite being an inexpensive terminal, the good construction makes the feeling is that of a much more expensive mobile.

Understanding the Xiaomi mobile mess: a bit of order in the wide (and chaotic) Xiaomi catalog in Spain

Img 8082

The buttons are also well fixed, without gaps and with a more than correct touch. Also note that, as it is not a terminal with an excessively large screen, it is relatively compact (taking into account current times). The weight, of almost 200 grams, is noticeable, but later we will talk about the justification for this.

Img 8076

The screen is one of the weakest points of this Redmi 9. Although it is not badly calibrated and the level of sharpness is sufficient, in full sun you can hardly see anything. Both in automatic and manual the maximum brightness is insufficient, since it is simply impossible to distinguish the contents that the screen shows.

The panel is not bad in sharpness and calibration, but the maximum brightness is very poor. In bright light, you can hardly see anything and you can’t use the phone

It is a 6.53-inch LCD panel with Full HD + resolution and a small drop notch. Indoors the experience is correct, but if we go outside and it is sunny, we will have to get used to looking for a shade or using something as a visor to be able to see the panel.

Img 8083

When it comes to sound, the experience is pretty fair. We have a single speaker at the bottom It neither sounds too strong nor does it have a lot of body. However, being a mobile of just over 100 euros, you cannot demand much more. The positive point regarding sound is that we have a headphone jack on the back.

Understanding the Xiaomi mobile mess: a bit of order in the wide (and chaotic) Xiaomi catalog in Spain

Fair performance and autonomy for two days

Img 8087

To move the Redmi 9 Xiaomi has incorporated a MediaTek Helio G80, accompanied by 4 GB of RAM and 64 GB of storage in the case of the most powerful version. The Xiaomi moves well enough for basic tasks, but the lag does not take long to appear if we demand a little.

In basic use there are not too many problems, but lag appears easily as we begin to demand a minimum of performance

If we use apps like Chrome, Gmail, WhatsApp and others we will not have the slightest problem, but if we want use more multitasking, enjoy some casual game or any task that requires something more demanding, the lag will make an appearance. We have also had the occasional freeze when switching between apps.





OPPO A5 (2020)


Helio G80

Snapdragon 720G

Exynos 9610

Helio G80

Snapdragon 665






3 GB








389 / 1,401

546 / 1,607

347 / 1,338

386 / 1,322

312 / 1,306







Regarding the software we find MIUI 11, although this Redmi 9 will update within not too long to MIUI 12 (some versions from other countries already have this ROM). It is based on Android 10 and, despite being an entry range, you will receive Android 11, although no date yet.

MIUI is still a very dense and bloatware-laden ROM. Luckily, we can delete most of the apps that come pre-installed on the phone

We are thus faced with a fairly dense layer of customization, with some bloatware (eBay, Facebook, LinkedIn, Amazon, etc.) which, luckily, we can uninstall in a simple way.

Img 8080

MIUI 12: all the news of the Xiaomi customization layer and which phones will receive the update

Regarding biometrics, we have a fingerprint reader camouflaged in the camera module. It is quite fast and hardly fails, so we have felt quite comfortable with it. The position is practically perfect for the finger, another point that plays in its favor.

To complete the biometrics section, we have facial recognition it does not work too fast nor is it very safe. This is the classic modification of the Google Smart Lock through the front camera, so we have found ourselves more comfortable deactivating it and using only the fingerprint reader.

Battery Redmi Note 9

The battery is one of the strongest points in this Redmi Note 9, which does not have the slightest problem in reaching 10 hours of active screen. This translates into two days of use with about five hours on each of them, practically twice the duration of a good number of current phones. The load, yes, is quite slow, going to practically three hours.

Four cameras so as not to be left behind

Img 8072

Before talking about the results that the Xiaomi Redmi 9’s camera offers, let’s take a look at its camera application. It is practically identical to that of its brothers, complete, with various modes and possibilities such as manual mode, something that is appreciated in an economic mobile.

Redmi Note 9

Nevertheless, the application is very slow, especially when we open a photo and want to return to the app, it takes a few seconds. When changing modes we also find several lags, which make the user experience somewhat frustrating.

Good results during the day, poor when the light falls

Daytime Photo1 During the day the photos are correct, although somewhat overexposed.

During the day the Xiaomi Redmi 9 behaves more than worthy for its price range. Dynamic range is pretty decent and the detail is above what is expected in a mobile this cheap. Images are generally slightly overexposed, with some burned out in areas with the highest incidence of light.

Daytime Photo 2 We see that the Redmi Note 9 does not behave badly at the level of detail indoors.

In this indoor photograph we can see that even without excessively strong incidence of light it manages to maintain good detail. It manages to lift the shadows quite well, although the colors are more saturated than they should be.

Img 20201004 184116 Cropping is great, but the app has a hard time recognizing some objects.

Portrait mode it works in a quite improvable way. For some reason the Redmi 9 has a hard time recognizing objects and people. It constantly tells us to get away from the target, and it’s a constant struggle to get it to apply the blur effect. Once the object is recognized, the results are good, but the user experience is not good.

Daytime Photo1

If we talk about the 8 megapixel ultra wide angle, we find bittersweet results. During the day it is attractive, but falls well below the main sensor. This is common, but there are many differences even in the treatment of color and white balance.

Img 20201001 100725

As for the macro mode, it is still testimonial. It is a very low resolution lens that hardly offers any detail. It is always appreciated having it compared to not having this lens, but we miss a sensor and lens that offer more detail.

Ultra Wide Angle1 Ultra wide angle on the left. Main sensor on the right. Same photo at the same time.

Despite being an input range, the Redmi 9 gets too knee-deep at night. It costs him a lot to get light, and we find, between …