Xiaomi Redmi 9 Specifications, Tests and Review

Display
6.53", 2340 x 1080
Front Camera
8 Megapixel
Main Camera
13 Megapixel
Storage
64 GB
RAM
4 GB
Processor
MediaTek Helio G80
Battery
5020 mAh

Get the key specs, technical data, ratings and full review of Xiaomi Redmi 9 all in one place. Compare your selected model with other alternatives and give your decision on the best phone a solid base with our comprehensive overview.

DESIGN AND DIMENSIONS Xiaomi Redmi 9
Product Type Smartphone
Form Factor Touch
Height 163.32 mm Better than 93 % of phones rated.
Width 77.01 mm Better than 91 % of phones rated.
Depth 9.1 mm Better than 60 % of phones rated.
Weight 198 g Worse than 90 % of phones rated.
Body Colour Carbon grey
Waterproof (Water-resistant) -
SAR Value 1.065 W/kg (body), 0.789 W/kg (head), 2.309 W/kg (limb)
Integrated Components Ultra-linear speaker
Connector Type USB Type-C - 24 pin USB-C
Headset jack - mini-phone 3.5mm
SIM Card Type (Size) Nano SIM
SIM Card Qty Dual-SIM

The Xiaomi Redmi 9 has dimensions 163.32 mm × 77.01 mm × 9.1 mm. Its weight is 198 g.

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DISPLAY Xiaomi Redmi 9
Screen Size (Display Size) 6.53" Better than 91 % of phones rated.
Screen Resolution (Display Resolution) 2340 x 1080 pixels Better than 85 % of phones rated.
Display Format Full HD+
Pixel Density 394 ppi Worse than 60 % of phones rated.
Aspect Ratio 19.5:9
Max Brightness 400 cd/m²
Contrast Ratio 1500:1 Better than 50 % of phones rated.
Display Enhancement Technology Sunlight mode
Display Features Colour temperature adjustment, Dot Drop display, Reading mode 2.0
Display Protection (Screen Protector) Corning Gorilla Glass 3 (scratch resistant glass)

The screen size reaches 6.53" inches. With a large display, phone offers a great experience for watching videos, playing games and reading. The best phones today are 6.5'' or more. They have the advantage of a large display area that allows you to see more content than with conventional display sizes.

Display Resolution of Xiaomi Redmi 9 is 2340 x 1080 pixels. A higher display resolution is a prerequisite for a sharper image. The standard for mid-range phones today is a Full HD resolution of 1920 × 1080 px. Cheaper phones, which usually have a smaller diagonal, have an HD resolution of 1280 × 720 px. Smaller resolutions can only be found in older models. Best phones, on the other hand, have a 4K resolution of 3840 x 2160 px. Another important factor having impact on the final image is display´s pixel density. In case of this model, the value reaches 394 ppi. With pixel density, the higher the value, the sharper the image will be. On average today, the image fineness value is around 350-400 ppi. This will guarantee a sufficiently fine and sharp image for normal use. However, the best phones on the market today are equipped with pixel density of 450 ppi or higher.

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PROCESSOR Xiaomi Redmi 9
Processor Type (CPU) MediaTek Helio G80
Clock Speed 2 GHz Better than 70 % of phones rated.
Processor Core Qty 8-core Better than 99 % of phones rated.
64-bit Architecture Yes Better than 82 % of phones rated.
Graphics System (GPU) Mali-G52 MC2

Xiaomi Redmi 9 is supplied with MediaTek Helio G80. The number of processor cores is 8. It is a number of cores that plays an important role in evaluating the performance of phone as it is responsible for computing operations. Smartphones already commonly have a core count of around 4 to 8. Multi-core processors can perform better and reduce the processing time of a request to a minimum, which is reflected in the responsiveness of the phone, e.g. in the speed of opening applications. Another important parameter is the processor frequency, which indicates how many instructions the phone can process in one second. Similar to refresh rate, the higher the number, the faster the phone responds. Processor frequency of phone Xiaomi Redmi 9 is 2 GHz. As standard today, you'll find this value between 1.8 GHz and 2.8 GHz.

The processor also includes the graphics accelerator Mali-G52 MC2.

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MEMORY Xiaomi Redmi 9
RAM LPDDR4X SDRAM - 4 GB Better than 81 % of phones rated.
Internal Memory Size (Storage Capacity) 64 GB Better than 75 % of phones rated.
Supported Flash Memory Cards (Expandable Memory) microSD

One of the most important parameters for user´s decision is often internal memory capacity. The larger it is, the more apps, photos, movies and other files your phone can store. This phone has 64 GB storage. It is currently the most common storage size among today´s smartphones. The capacity is perfectly adequate for the average user. It will allow you to store thousands of photos, high-resolution videos, dozens of apps and several games on your phone. But if you're one of those really demanding users and you use your phone to shoot 4K videos etc., then you should rather pay extra to have a larger storage of 256 GB or more. Nowadays, you can usually find one phone model on the market with several different memory sizes. This allows each user to choose what suits them best.

For this model it is possible to increase the storage size by inserting a memory card.

Size of the RAM memory tells us how powerful the phone is. Xiaomi Redmi 9 is equipped with LPDDR4X SDRAM - 4 GB. Commonly today you will find phones with 6 to 8 GB of RAM. This means that the phone can easily handle normal operation and more demanding applications or games. Higher RAM of 12 GB can be found in best phones on market and are ideal especially for avid gamers. On the other hand, operating memory below 4 GB is more of an issue with lower-end phones and older models. However, even they will find their fans among less demanding users, who don´t want to spend much on buying new phone.

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CAMERA Xiaomi Redmi 9
MAIN CAMERA
Number of Main Cameras 4
Sensor Resolution 13 Megapixel Better than 78 % of phones rated.
Lens Type Wide-angle lens
Lens Aperture F/2.2 Worse than 73 % of phones rated.
Field of View (FoV) 75.2 degree(s)
Focus Adjustment Automatic
Special Effects HDR, Kaleidoscope
Camera Modes Portrait mode
Light Source Flash
Video Resolutions 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps
SECOND CAMERA
Sensor Resolution (2nd Camera) 8 Megapixel Better than 50 % of phones rated.
Lens Type (2nd Camera) Ultra wide-angle lens
Lens Aperture (2nd Camera) F/2.2 Better than 87 % of phones rated.
Field of View (2nd Camera) 118 degree(s)
THIRD CAMERA
Sensor Resolution (3rd Camera) 5 Megapixel Better than 53 % of phones rated.
Lens Aperture (3rd Camera) F/2.4 Better than 76 % of phones rated.
Camera Functions (3rd Camera) Macro camera
FOURTH CAMERA
Sensor Resolution (4th Camera) 2 Megapixel Better than 75 % of phones rated.
Camera Functions (4th Camera) Depth camera
FRONT CAMERA
Number of Front Cameras 1
Sensor Resolution (Front) 8 Megapixel Better than 68 % of phones rated.
Lens Aperture (Front) F/2.0 Better than 89 % of phones rated.
Field of View (Front) 77.8 degree(s)
Focus Adjustment Focus free
Special Effects (Front) HDR
Camera Modes (Front) Portrait mode
Light Source (Front) Display flash
Camera Features (Front) Self-timer, Palm shutter

The rear camera of the phone Xiaomi Redmi 9 has 4 lenses. Today's modern phones usually have several rear lenses. The most common are macro lens, telephoto lens and wide-angle lens. Each is used to capture the perfect photo - macro lens is designed for close-up photography, telephoto lens, often equipped with an optical zoom, is for photos of objects in distance, and wide-angle lens captures larger areas where you need a wider field of view. The main lens is designed as Wide-angle lens. The resolution of main lens is 13 Megapixel. Nonetheless, resolution alone does not necessarily mean a good photo. Therefore, you should look at other parameters such as lens aperture or pixel size. Another important factor is the aperture, which in this case is F/2.2 and determines how much light passes through the sensor. Best phones have an aperture of up to F/1.5. But the most common lenses today are F/1.8 to F/2.2. In this case, the lower the number after the slash, the higher the photo quality.

Second camera
The second lens of rear camera is designed as Ultra wide-angle lens. The field of view of second lens reaches 118 degree(s). The resolution reaches size of 8 Megapixel. In addition, this lens also features lens aperture of F/2.2.

Third camera
The resolution of third lens is then 5 Megapixel. The aperture reaches size of F/2.4.

Fourth camera
The resolution of fourth lens is 2 Megapixel.

Front camera
The front camera of phone Xiaomi Redmi 9 has one lens. This number of lenses is standard on most smartphones nowadays. The lens is equipped with 8 Megapixel. However, do not forget there are other factors than resolution having impact on the final quality of front camera photos. The main front lens also achieves F/2.0. The field of view of front camera is 77.8 degree(s).

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BATTERY AND CHARGING Xiaomi Redmi 9
Battery Capacity (Battery Size) 5020 mAh Better than 99 % of phones rated.
Talk Time 1860 minutes Better than 92 % of phones rated.
Run Time Details Talk: up to 1860 min
Continuous navigation: up to 19 hrs
Playback (video): up to 19 hrs
Playback (Music): up to 185 hrs

The battery size of Xiaomi Redmi 9 is 5020 mAh. Nevertheless, battery capacity is not the only factor that affects the phone's battery life. For example - the size of the display, the performance of the processor, the use of data functions and, of course, the intensity of use of phone in general all have a significant impact on battery life. Standard for most smartphones today is a battery capacity of around 4500 to 5000 mAH. Phones with this battery size usually guarantee a phone life of at least 1 day. Older or cheaper smartphone models can then reach battery capacities typically around 2500 mAH and below. With this capacity, you may find that if you use your phone heavily, you may need to recharge your phone during the day. The phone Xiaomi Redmi 9 will last one charge with constant phone calls 1860 minutes.

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CELLULAR Xiaomi Redmi 9
Technology WCDMA (UMTS) / GSM
Mobile Broadband Generation 4G Better than 88 % of phones rated.
Navigation GPS, A-GPS, GLONASS, BeiDou

Standard 4G connectivity is currently being replaced by 5G, but is still the preserve of the latest phones. Xiaomi Redmi 9 supports 4G. 3G connectivity is now only found in the oldest phones.

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COMMUNICATIONS Xiaomi Redmi 9
Data Transmission GPRS, EDGE, HSDPA, HSUPA, HSPA+, VoLTE, FDD-LTE, TDD-LTE
3G UMTS Band Band 1, Band 2, Band 4, Band 5, Band 8
3G UMTS Frequency 2100, 1900, 1700, 850, 900
4G LTE Band Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 20, Band 28, Band 38, Band 40, Band 41
4G LTE Frequency FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500
Wireless Interface IEEE 802.11b/g/n
Bluetooth Bluetooth 5.0
Messaging Services SMS, MMS

Bluetooth 5.0 must not be missing from the basic package. It makes it easy to connect wireless headphones to your phone, connect your phone to your TV, tablet, speaker and more.

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MEDIA Xiaomi Redmi 9
Supported Digital Audio Standards AAC, PCM, MP3, FLAC, AAC +, eAAC+, APE (Monkey's Audio), AMR-WB, AMR-NB
Supported Digital Video Standards MKV, H.264, ASP, MP4
FEATURES Xiaomi Redmi 9
Phone Functions Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert
Sensors Accelerometer, ambient light sensor, digital compass, distance sensor, infrared (IR) sensor
Security Devices Face recognition, fingerprint reader
Additional Phone Features Fast Charging, AI face unlock
OTHERS Xiaomi Redmi 9
Included Accessories SIM card removal tool, USB-C cable, TPU case, 10W charger

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