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review with features, price and specifications

22 mayo, 2021

Xiaomi has several workhorses to win in mid-range 2020. Several of them belong to the Redmi Note 9 family, in which the model with the least surnames is the cheapest, although no less interesting for that. Accompanying the Xiaomi Redmi Note 9S and Redmi Note 9 Pro, the Redmi Note 9 is the subject of this analysis in which we will answer the question of whether or not this model is worth it.

So let’s review in detail the characteristics and behavior of this Xiaomi Redmi Note 9, a low-mid-range terminal that has some strengths to consider such as a high-amperage battery and a fairly versatile camera configuration (at least on paper).

Xiaomi Redmi Note 9 data sheet

Xiaomi Redmi Note 9


6.53 “IPS FullHD +

2,340 x 1,080 px (19.5: 9)

450 nits, Gorilla Glass 5


MediaTek Helio G85

Octa-core at 2.0GHz

ARM Mali G52 GPU


3/4 GB


64 / 128GB + microSD (up to 512GB)


5,020 mAh

Fast charge 18W

Rear cameras

Main: 48MP, f / 1.79, 1.6μm

Wide angle: 8MP, f / 2.2, 118º

Macro: 2MP

Depth: 2MP

Frontal camera

13 megapixels, f / 2.25


Android 10

Dimensions and weight

162.3 x 77.2 x 8.9 mm

199 g


Infrared, 3.5mm jack, Bluetooth 5.0, USB type C, NFC, dualSIM, LTE, rear fingerprint reader


From 199 euros

Xiaomi Redmi Note 9 - 6.53 ”FHD Smartphone (DotDisplay, 4 GB RAM, 128 GB ROM, 48 MP Quad Camera, 3.5 mm Hotshot, Headphone Jack, 5020 mAh battery) Midnight Gray [International Version]

Xiaomi Redmi Note 9 – 6.53 ”FHD Smartphone (DotDisplay, 4 GB RAM, 128 GB ROM, 48 MP Quad Camera, 3.5 mm Hotshot, Headphone Jack, 5020 mAh battery) Midnight Gray [International Version]

Design: eye-catching from behind, improvement from the front

Img 7610

The Xiaomi Redmi Note 9 renounces the glass to bet on the plastic on its back. However, it seems to have hit the color palette and, in particular, the unit in blue is quite beautiful and striking in our opinion. Also remarkable the design of the camera module that can convince more or less aesthetically but is quite different from what we are used to seeing. The main penalty comes at the level of dimensions. It exceeds 16 centimeters in height and touches 200 grams, measures that make the Redmi Note 9 a somewhat complicated terminal to use with one hand.

The Xiaomi Redmi Note 9 is quite striking from the back. The construction is solid and well finished, despite the lack of premium materials

Also note that the power button is quite accessible despite being a large terminal, not as much as the volume buttons, which they are quite high and they force us to stretch our thumb a little more than we would like. The alignment of ports and speakers is symmetrical at the bottom and the top houses an infrared emitter.

Img 7617 The shading is visible on the edges of the Redmi Note 9.

At the screen level, the Redmi Note 9 complies, but it can be improved. We are facing an IPS panel with Full HD + resolution, aspect ratio 19.5: 9 and coating with Gorilla Glass 5. The interpretation of the color is correct (and very customizable from the settings), the sufficient sharpness and the viewing angles comply . The brightness, however, is its weakest point, with just 450 nits. In conditions of sunlight with full incidence we find some other problem to see the panel well. The frontal use according to GSMarena is 83.5%, especially with a somewhat pronounced lower frame.

The panel has the classic shading around the edges of IPS panels. However, it is somewhat exaggerated in the case of the hole in the screen, which is completely enveloped by this shadow.

Img 7615

In the same way we find some shading, something typical in economic IPS, but quite accented as, for example, in the case of the hole in the screen, completely wrapped between said shading. Speaking of the hole, It is a little big and we have to spend a few hours on the phone to get used to it. Considering how small the front camera sensor is, we would have appreciated a better size adjustment.

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

Img 7619

At the sound level, the Redmi Note 9 kneels down. We are facing a speaker that is not too powerful (around 70 dB in our tests) and that distorts in a greater range than we expected. Even a few volume points below the maximum sound we found noticeable distortion and a somewhat tinny sound.

The positive point is that we find a headphone jack at the bottom of the device, so we can connect any speaker compatible with this input to reproduce the sound.

A MediaTek processor that delivers, but doesn’t shine

2020 is being a good one for MediaTek at the expansion level. After shining with the G90T that we saw in proposals such as the Xiaomi Redmi Note 8 Pro and pointing out ways with the 800 series of 7nm, he wants to conquer us in the Redmi Note 9 with the Helio G85, a proposal of 12nm, octa-core and with maximum frequency. of 2 GHz. Although in nomenclature it seems to be a step below the G90T, the truth is that there is quite a difference. The Redmi Note 9 is valid for day to day, but it is quite simple to make the lag and the small jerks in basic tasks such as switching between applications, keeping more than 6 or 7 apps in multitasking and betting on a heavy game.

Apart from the relative raw power of the processor, the 3 GB of RAM does not accompany. The mobile is enough to move the applications of the day to day, but it costs more than we expected

Nor does the 3 GB of RAM help with which our unit has, insufficient figure to manage a resource-hungry layer such as MIUI, which works excellently when the hardware accompanies, but which can weigh down the experience if we lack power. We leave you with the benchmarks table so you can see how it looks at the level of numbers.

Xiaomi Redmi Note 9

Realme 6i



OPPO A5 (2020)



Helio G85

Helio G80

Exynos 9610

Snapdragon 665

Snapdragon 665

Kirin 710


3 GB




3 GB









GEEKBENCH 5.0 (single / multi)

351 / 1,291

386 / 1,322

347 / 1,338

308 / 1,341

312 / 1,306

317 / 1,282








In the biometrics section we find a fingerprint reader on the back. The location and size are practically perfect, being quite easy to get the reader right the first time. At the speed level, it is not the fastest reader we have tested, but it more than fulfills its mission. We also have a facial recognition system through the front camera of the device. It works quite fast but at the security level it leaves several loose ends. Without going further, the device recognizes us with a maskEven though we have searched our face without it.


At the software level we find Android 10 and MIUI 11. To our surprise, is updated with the security patch for the month of May. This is quite a plus since economic terminals tend to be somewhat forgotten at the level of receiving the latest patch. From MIUI we can highlight how customizable it is, how careful it is at the interface level and the strong pre-loading of applications that it includes (some of them can be uninstalled and others not). We quite like the layer although, as we indicated in the performance section, in the case of this Redmi Note 9 the animations and operation of it is not remarkable.

MIUI 11: how to remove pre-installed apps to save internal memory in seconds

If we talk about autonomy, the more than 5,000mAh of the Redmi Note 9 make it perform outstandingly. The two days of use are guaranteed with average use

Miui Battery

With a panel that does not spend too much, a processor that does not demand too many resources and a huge 5,020mAh battery, the Redmi Note 9 it can exceed 10 hours of screen if it is proposed. It is one of those phones with which we can reach two days of use without minor problem, highlighting that under no circumstances is it overdrained. We can play, take photos and use all kinds of applications without the mobile suffering. The battery, having so much amperage and so little expense, tends to go down progressively. The fast charge is 18W.

Point out as a curiosity that we have not found the screen hour counter in this specific version of MIUI, since it is not found where it is usual. In the same way, applications such as GSAM Battery Monitor do not count the screen time well in MIUI (they add minutes even with the panel turned off), so the estimation of hours has been made by manually counting hours of use.

Four cameras don’t mean better pictures

Img 7614

Xiaomi has opted for a configuration of four rear cameras for this Redmi Note 9. Specifically, we run into a 48 megapixel main sensor along with an 8 megapixel ultra wide angle. The other two sensors are a macro and another depth sensor to get a better portrait mode. The summary is that the phone fairly fulfills its mission, although we are going to review the camera application first.

Xiaomi App Camera

Xiaomi’s camera application is quite complete. However, we have already seen how something slow can work if the power is not very high and in the “small” Redmi Note 9 this is even more accentuated. The application moves somewhat awkwardly even when we are switching between 1X, 2X and 0.5X. It fulfills its basic mission to allow us to access functions such as portrait, night, panoramic mode and even a manual mode to adjust the photographs to taste. In short, a very complete app penalized by a slow pace.

Daytime photography

Redmi Note 9 detail The detail is enough, but the sky is completely burned.

In the daytime photography section, the Redmi Note 9 behaves one notch below what is expected. Less demanding users will find themselves in front of a versatile camera that offers correct photographs, although it is easy to see its weak points from the first moment. Overexposure is present in almost all …