Samsung Galaxy A51 review

Read our full review to find out how the Samsung Galaxy A51 differs, what our opinion of it is and whether it's worth the money.
Added by on 12.12.19 | Last update 12.23.21
Samsung Galaxy A51 ревю
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3.82 / 5


Let us introduce you to one of Samsung's interesting mid-range smartphone models. It belongs to the Galaxy A series. It combines good functionality for its price. 

Before reading the full review, you can familiarize yourself with the detailed Samsung Galaxy A51 specs or watch the video below the article.


  • Release date: 2019, December
  • Colors: Prism Crush Black, White, Blue, Pink
  • Dimensions: 158.5 x 73.6 x 7.9 mm.
  • Weight: 172 g.
  • Screen: 6.5" inc, 1080 x 2400, Super AMOLED
  • Camera : Quad, 48MP
  • Chipset: Exynos 9611 (10nm)
  • CPU: Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53)
  • Memory: 64GB 4GB RAM, 128GB 4GB RAM, 128GB 6GB RAM, 128GB 8GB RAM
  • Battery: 4000,  Non-removable Li-Po
  • Network: GSM / HSPA / LTE
  • Operating system: Android 10.0; One UI 2
  • Sensors: Fingerprint (under display, optical), accelerometer, gyro, proximity, compass


In appearance, the Galaxy A51 differs from its predecessor. Its design is more similar to that of Samsung's new models. As an example, we will give the S10 Lite and the A71. Among the differences, we also see the use of the infinity-O display, popular these days. Also impressive is the different design of the main camera module. 

We take a look at the pages. Plastic has been used on the edges, which cleverly imitates aluminium. The back panel is plastic with a lacquer finish. To the touch, it resembles glass. This model of the South Korean company is available in four colour solutions. The user can choose between red, blue, black and white. 

If you are wondering if the back panel coating has a name, yes it does. It's called Prism. With several diagonal lines, the case is divided into zones. Depending on the angle you look at the device, light is reflected differently. 

Look at the bezels around the Galaxy A51's screen. They're small. The top and bottom are just a little wider than the sides. The display takes up over 87% of the front panel. Thanks to the thin bezels, the Galaxy A51 is characterised as a mid-sized device. Its dimensions are 158.5×73.6×7.9 mm. Its weight is 172 grams. It is six grams heavier than the A50. You'll have no trouble keeping your phone in the front pocket of your jeans. The Galaxy A51 also lies nicely in the palm of your hand. The rounded edges contribute to this. 


While the Galaxy A51 is larger than the A50 in diagonal (6.4 vs. 6.5 inches), the front panel area has been reduced slightly.

As with its predecessor, the manufacturer has opted for a screen made using Super AMOLED technology. The aspect ratio is 20:9 and the resolution is 1080 x 2400 pixels. The pixel density is approximately 405 ppi. The screen is slightly more elongated and has a denser pixel arrangement. 

The maximum screen brightness is quite high. On the street, you can easily read the display information. As with other screens made with this technology, this parameter varies depending on the amount of white in the image. 

Colour temperature adjustment and support for the Always On Display mode are provided. In the latter, when the screen is inactive, the user continues to see the time and additional information. 


If you want to unlock the Galaxy A51, you can use facial recognition. It works with the help of the front camera. The whole procedure takes about 3 seconds or even less. In other words, it's not instant, but it does work pretty fast. Even if you are wearing a hat or a big scarf, it won't prevent the technology from doing its job. 

The fingerprint scanner is another safety system you can use, betting on the Galaxy A51 model. It's below the screen. It works noticeably slower than what the technology shows on flagship models. In ideal conditions - with clean and dry fingers, a warm environment, recognition takes half a second. With wet fingers, cold weather, rushing - you'll need to exercise patience. 


The Galaxy A51 is based on the Exynos 9611's own development SoC. The chipset is implemented in 10nm process technology. It includes an 8-core CPU consisting of 4 Cortex-A73 performance cores (up to 2.3 GHz) and 4 Cortex-A53 power-efficient cores (up to 1.7 GHz). The Mali-G72 MP3 GPU is responsible for graphics processing. 

The smartphone can be found in several versions - with 4, 6 or 8 GB of RAM. The internal storage is 64 or 128 GB. 

Let's say a few words about the chipset. The Exynos 9611 is typical for mid-budget solutions. We know it from another popular model on the market - Galaxy M30s. It offers sufficient performance for everyday tasks. The interface works smoothly and seamlessly. Applications launch satisfactorily fast. Heavy games should be treated with care. Slowdowns may already occur there. 

Operating system 

The Galaxy A51 runs Android 10. It is supplemented with the company's One UI 2.0 interface. 


One of the major positive changes in the Galaxy A51 compared to the A50 is the camera. The resolution of the main module has been increased from 25 MP to 48 MP. We also know about it that the aperture is f/2.0. The equivalent focal length is 26 mm and the sensor size is 1/2.0″. There is phase detection autofocus. The ultra-wide sensor is 12-megapixels at f/2.2. Another 5-pixel module has been added for macro shots. The last module is designed to blur the background. 

In the interface everything is simple and intuitive. The additional modes - such as panorama, macro, night mode, slow motion, etc., are located in the "More" option. The main unit takes 12-megapixel photos by default. 

If you have ideal conditions, it's sunny outside, for example, your photos will come out saturated and detailed enough. HDR is on by default. It automatically and well handles the details in the bright areas of the footage.  

With the Galaxy A51 in hand, you can count on average-quality photos in the night hours of the day. The detail isn't high enough. The camera also has a night mode. It allows you to get higher quality footage. Just choose correct exposure, better detail processing and halftones. 

The model also offers video shooting in Full HD resolution - at up to 240 frames per second. When shooting standard videos, the electronic stabilization mode is activated. It allows you to eliminate hand shake and significantly improves the final result. 

Autonomous operation 

Galaxy A51 has received a battery with a capacity of 4000 mAh. It allows you to enjoy a standard duration of autonomous operation. In real conditions, the user can count on a few days under moderate load. In more intensive work will require recharging every day. 

The model supports fast charging technology (15W). With its help, you can fill 30% of the charge in just 30 minutes. 


This model of Samsung takes its place worthily in the middle price class of smartphones. It offers an updated design and a larger screen diagonal. Plus, the main camera has received a higher quality macro module. 


  • Contemporary design;
  • Large and quality screen;
  • Excellent camera performance for this class of phone;
  • Can take quality night time photos;
  • Gorilla Glass 3 protection; 
  • Availability of NFC for contactless payments.


  • Speed of the scanners.

Samsung Galaxy A51 video review

Disclaimer: The information presented in this article is based on our team's personal experience with the Samsung Galaxy A51 and third-party sources. While every effort has been made to provide accurate and reliable information, readers should keep in mind that this is a subjective assessment. The writing of this article was not paid for or sponsored by Samsung.

Richard Taylor

Richard Taylor

Richard Taylor is a technology expert and journalist based in the UK. With a degree in Computer Science from the University of Birmingham, he provides insightful analysis and expert reviews of the latest smartphones and technology. His technical expertise, passion for technology and years of experience make him a trusted source in the industry.

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