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Samsung Galaxy A51
Samsung Galaxy A51
Samsung Galaxy A51
Samsung Galaxy A51
Samsung Galaxy A51
Samsung Galaxy A51
Samsung Galaxy A51

Informr score
The Samsung Galaxy A51 currently has an Informr score of 7.3 out of 10. This score is based on our evaluation of 38 sources including reviews from users and the web's most trusted critics.

What's good

  • Decent Camera
  • Headphone jack
  • All-day battery
  • AMOLED display

What's bad

  • Dysfunctional fingerprint scanner
  • Sluggish processor
  • Not waterproof
  • Questionable price

The Samsung A51 is one of the many mid-tier smartphones entering the market in 2020. With lower prices than their premium counterparts, you can spend less money, but price is only one factor in determining an excellent value.


It has all the presence of a premium phone at a distance. The Samsung A51 is nearly bezel-less with a big screen and an eye-catching prismatic effect on the back case. But its sturdy plastic chassis gives away some of its budget-friendly roots. In some regions, it’s also available in a few fun colors, such as white and blue.


The phone sports one of Samsung’s famous AMOLED screens, offering deeper colors and sharper contrast. However, reviewers stated that they felt this wasn’t the best quality they had seen from the phone company -- even on less expensive models.


The performance is where reviews begin to fall apart. Stuttering and lag result from a processor that’s not up to the task. When flipping between only 2 or 3 apps reviewers noted the screen froze momentarily before finally responding. This was especially common when using the camera.

Wired states, “In reality, it's … fine. Its processing power resembles that of phones close to half its price...”

Software & Storage

The Galaxy A51 runs Android 10 with the Samsung One UI running on top. This makes it look remarkably similar to the Galaxy S20 but that’s where the similarities end.

TechRadar puts it this way, “The Samsung Galaxy A51's software looks like that of a top-end Samsung, but it doesn't feel the same. There's significantly more lag here, apps take longer to load, and there are some pauses we were a little surprised to see in a phone at the price.”


Following along with the rest of the impostor syndrome, it boasts four cameras. But reviewers were disappointed with the quality, adding that the only plus was the wide-angle photo option. Reviews indicate that all the bells and whistles look good on paper but rarely work as they should.

Battery Life

Battery life was simply rated fair. The phone doesn't offer the extended battery of other mid-tier phones but wasn't the worst either. Clocking in at just under a day in most reviews, it should keep you going until you get home -- but you better charge it every night.

The Verge had this to say, "Battery life is okay, but it doesn’t quite hit Samsung’s claim that it’s ‘long-lasting.’ I’m getting just over a day."


The audio quality on the Samsung A51 also tested fair. It doesn't have deep bass or loud volume, but it's not terrible. Reviewers stated that call quality is where it shines, with crisp clear sound -- even near heavy construction.

Specs at a Glance

  • Sturdy plastic, prismatic back case
  • 6.5-inch, 1080p AMOLED display
  • 2.3GHz Samsung Exynos 9611 processor
  • 4/6/8GB of RAM
  • Android 10
  • 64/128GB internal storage with microSD support
  • Quad-lens rear camera (48MP/12MP/5MP/5MP)
  • Ultra-wide, depth and macro secondary cameras
  • 32MP front-facing camera
  • 4,000mAh battery

Bottom Line

The difficulty with the phone comes from the name. With a name like Samsung attached to it you expect a certain level of quality and reviewers felt the Samsung A51 fell short. Acceptable among the range of mid-tier phones and poorly functioning compared to the others as well thanks -- or no thanks -- to its processor. It’s likely enough for casual use, but gamers and heavy phone users will want to look elsewhere.

Tech Radar had this to say, "One important part of the A51 is below average at the price, though: performance..."

PC Magazine stated, "The Samsung Galaxy A51 is a perfectly good Android phone for many users. It has a big, crisp AMOLED display, long battery life, and sharp cameras. If it had a faster processor, you'd be seeing a higher score here."

Operating system
Operating system
2.3 GHz
2.3 GHz
Screen Size
Screen Size
48+ MP, f/2.0
48+ MP, f/2.0
4000 mAh

What the Critics Are Saying...

Expert Reviews
Expert Reviews

The Samsung Galaxy A51 is still the better choice in many ways. It’s bigger, more powerful and looks nicer than the Xiaomi. Samsung also provides better post-launch software support, supplying Android updates on a more frequent basis. Barely setting a foot wrong, and expertly navigating that fine li...

- Nathan Spendelow, Expert Reviews

The Samsung Galaxy A51 is an overall good offering under Rs. 40,000 in Nepal, but not the strongest in terms of performance. It’s perfect for casual smartphone users, who don’t give much emphasis on performance & gaming.

- Pratima Adhikari, Gadgetbyte
Hitech Century
Hitech Century

While the Samsung Galaxy A51is a bit pricier than other midrange offerings, but capably offers the essentials to a great mid-range smartphone experience without significant shortcomings in other  areas. It brings to the table a vibrant Super AMOLED display, solid performance, long battery life and a...

- Hitech Century

The Samsung Galaxy A51 is an affordable way to get a good-looking Galaxy phone, but it makes Android feel a little too slow for us to wholeheartedly recommend it.

- Andrew Williams, TechRadar
Good Housekeeping
Good Housekeeping

Not only is this smartphone affordable, but it has an impressive battery life and camera, taking great photos even in low light.

- Good Housekeeping

Prices (Where to Buy)

Common Questions

We've got you covered! Download a free PDF copy of the Samsung Galaxy A51 user manual here.

Samsung backs up the Galaxy A51 with a 1 Year parts & labour warranty.

If your Galaxy A51 has problems and is still within its warranty period, you could contact Samsung support or the retailer you purchased the phone from. You'll find Samsung's contact information here. If your phone is off warranty and needs repair for a physical problem such as a broken screen or bad battery, you should visit an authorized service centre or a local phone repair shop. You can also connect with others in The Informr Community Forum to find and share answers to questions.

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Quick view

Screen Size

The Samsung Galaxy A51's screen size is 6.5 inches with 1080 x 2400 pixels resolution.

2.3 GHz

There is a Samsung Exynos 9611 (10nm) Octa-core 2.3 GHz processor (CPU).


The phone runs on the Android 10 operating system (OS).

48+ MP

You can take photos or capture video with the phone's onboard 48+ MP, f/2.0 camera.

There is also a secondary front facing camera with 32+ megapixels resolution.

64/128 GB

Internal memory is 64/128 GB. An external, MicroSD, MicroSDHC, microSDXC (up to 512 GB) expansion slot is available for increased storage capacity.


The phone is powered by a Lithium Polymer (Li-Pol), 4000 mAh battery. Samsung's performance ratings are 1920 minutes, 960 minutes Wi-Fi surfing.

Galaxy A51 Specs

Release Date February 7, 2020
Regions Available USA, Canada, United Kingdom
Operating System Android 10

Compare Android Smartphones

Processor Samsung Exynos 9611 (10nm) Octa-core 2.3 GHz
Internal Storage 64/128 GB
RAM 4/6/8 GB
Hearing Aid Compatible Yes
Noise Cancellation Yes
SAR Head: 0.80 W/kg
Body: 0.67 W/kg
Manufacturer Warranty 1 Year
Accessories Included USB Power Adapter, Manual, Headphones, Data Cable
Mobile / Cellular Data
Push-to-talk (PTT) No
Wi-Fi Calling Yes
Voice over LTE (VoLTE) Yes
SIM card size
Dual SIM Yes
USB OTG Support Yes
Infrared No
Bluetooth 5.0
Bluetooth Profiles A2DP, AVRCP, DUN, OPP/FTP, HID, HFP, HSP, PAN
Bluetooth Audio Codecs SBC
Wi-Fi 802.11 a/b/g/n
Mobile Hotspot Yes
Memory Expansion Slot Yes
Expansion Slot Info MicroSD, MicroSDHC, microSDXC (up to 512 GB)
Data Tethering Compatibility Yes
Main Camera
Resolution / Aperture
48+ Megapixels, f/2.0
Yes (LED)
Additional Rear Camera Info
Auto focus, Effects, Face detection, Geotagging, Image stabilization, Multi-shot, Panorama, Self-timer, 2nd camera feature (5 MP, F2.2, Depth sensor), 3rd camera feature (5 MP, F2.4, Macro), 4th camera feature (12 MP, F2.2, Ultra-wide), HDR
Video Recording Formats
Video Recording Parameters
Full HD (1920 x 1080 pixels), 30 fps
Front Camera
Resolution / Aperture
32+ Megapixels
Additional Front Camera Info
Aperture F2.2
Video Recording Parameters
Display / Screen
Type Color
Technology Super AMOLED
Colors 16.7 million
Resolution 1080 x 2400 pixels
Pixel Density 405 pixels
Size 6.5 inches
Secondary Display No
Sensors Ambient Light, Proximity, Motion / Accelerometer, Gyroscope, Digital Compass
Multi-Touch Yes
Fingerprint-Resistant Coating No
Additional Display Features Capacitive touchscreen, Infinity-O Display, Corning Gorilla Glass
Power & Battery
Battery Type Lithium Polymer (Li-Pol)
Battery Capacity 4000 mAh
Removable Battery No
Wireless Charging No
Fast Charging Yes
Video Playback Time Up to 1200 minutes
Internet Use (Wi-Fi) Up to 960 minutes
Internet Use (Cellular) Up to 900 minutes
Talk Time Up to 1920 minutes
Standby Time Up to 14.5 days
Mixed Usage
Physical Characteristics
Design Type Bar
Material Plastic
Colors Prism Crush Black, White, Blue, Pink, Prism Crush White, Prism Crush Blue
Dimensions [H x W x D] 15.85 x 7.36 x 0.79 cm (6.2 x 2.9 x 0.3 in)
Weight 172 grams
Water Resistant / Waterproof No
Rugged design No
IP Rating No
Headset Jack 3.5mm
External Speakers Yes
Input / Navigation
Sleep / Wake Key Yes
Home Key No
Input / Keyboard Type Touchscreen
Navigation Type Touchscreen
External Volume Control Yes
Fingerprint Sensor Yes
Additional Information Other Names (AKA):
Related Links Manual (PDF)
Samsung Galaxy A51 Reviews
Where to buy Samsung Galaxy A51
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