7.3/10
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 31 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.

Design

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.

Display

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.

Performance

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.”

Cameras

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."

Audio

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
Android
Processor
2.3 GHz
Screen Size
6.5"
Camera
48+ MP


What the Critics Are Saying...


Talk Android

The Galaxy A51 is a well-made smartphone with an interesting if unobtrusively pattern on the rear panel with all-day battery life, a fabulous AMOLED display, great customization options, and a dependable camera. Sadly, it’s let down by the sluggish processor and over-shadowed by handsets with simila...

- Peter Holden, Talk Android
Review Geek

If you want the biggest screen possible at this price point, and you love tiny bezels and a pinhole camera, you might be able to see past shortcomings in fingerprint reader, software, and battery life. If you love the look (especially with that pretty back) and the extra storage for a ridiculous amo...

- Michael Crider, Review Geek
Android Authority

With the A51, you’re getting a really great screen, decent build quality, some okay cameras, and even a headphone jack. While the build quality and screen are great, however, the sub-par performance of this phone is its Achilles heel.

- David Imel, Android Authority
uSwitch

The Galaxy A51 is a good low-cost alternative to the very expensive Galaxy S20 or even S10. It offers a high-quality OLED screen, excellent design and the best software you’ll find on any Android phone. The plastic construction and less durable glass at the front are all acceptable compromises. The...

- Luigi Palazzolo, uSwitch
Pocket-lint

A great design and screen are the big sells of this mid-ranger, which performs generally well but can struggle a little when it comes to gaming tasks. Otherwise the clean software experience makes for a generally polished and affordable choice.

- Chris Hall, Pocket-lint


Prices (Where to Buy)




Common Questions


Samsung released the Galaxy A51 on February 7, 2020.


The Galaxy A51 price will vary depending on retailer, age, special offers and whether or not it's purchased with a service plan. If purchased with a 2 year service contract for example, you would likely pay much less for the phone itself up front. You can compare Samsung Galaxy A51 prices from around the web here on The Informr.


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
6.5"

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

Processor
2.3 GHz

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

OS

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

Camera
48+ MP

You can take photos or capture video with the phone's onboard 48+ megapixel camera.

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

Storage
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.

Battery
4000mAh

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

Overview
Release date February 7, 2020
Regions available USA, Canada, United Kingdom
Mobile / Cellular Data
4G/LTE
Networks
LTE:
700/800/850/900 /1700/1800/1900/2100/2300/2500/2600 MHz
UMTS:
850/900/1700/1900 /2100 MHz
GSM:
850/900/1800/1900 MHz
Data:
GPRS, EDGE, HSUPA, HSPA+, LTE
SIM card size
Nano-SIM
Dual SIM Yes
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
ROM No
GPS Type A-GPS
Hearing Aid Compatible Yes
TTY/TDD Yes
Noise Cancellation Yes
SAR Head: 0.80 W/kg
Body: 0.67 W/kg
Languages English
Manufacturer Warranty 1 Year
Accessories Included USB Power Adapter, Manual, Headphones, Data Cable
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 (Celluar) Up to: 900 minutes
Talk Time Up to: 1920 minutes
Standby Time Up to: 14.5 days
Physical Characteristics
Design type Bar
Multi-Use Smart Phone / PDA Yes
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
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
Graphics Yes
Themes Yes
Backlit Illumination Yes
Zoom / Magnification Yes
Screen Orientation Lock Yes
Multi-Touch Yes
Fingerprint-Resistant Coating No
Additional Display Features Capacitive touchscreen, Infinity-O Display, Corning Gorilla Glass
Input / Navigation
Sleep / Wake Key Yes
Home Key No
Mute Key No
Input Type Touchscreen
Navigation Type Touchscreen
Predictive Text Entry Yes
Physical keyboard No
Voicemail Key No
Any Key Answer No
Voice Commands Yes
Keypad/Screen Lock Yes
External Volume Control Yes
External Media Playback Controls No
Fingerprint Sensor Yes
Call Management
Wi-Fi Calling Yes
Voice over LTE (VoLTE) Yes
Contact List Capacity Depends on system memory
Multiple Numbers Per Contact Email address, Other fields
Contact Groups Yes
Auto Answer No
Voice Activated Dialing Yes
Photo Caller ID Yes
Web / Email / Messaging
Web Browser Yes
Email Client Yes
Email Protocols POP3, IMAP, Microsoft Exchange
Additional Email Features Gmail
Messaging SMS, MMS, IM
Push-to-talk (PTT) No
Connectivity
USB USB Type-C
USB OTG Support Yes
Infrared No
Bluetooth 5.0
Bluetooth Profiles A2DP, AVRCP, DUN, OPP/FTP, HID, HFP, HSP, PAN
Bluetooth Audio Codecs SBC
WiFi 802.11 a/b/g/n
WiFi Encryption WEP/WPA/WPA2
Mobile Hotspot Yes
WiMAX No
Memory Expansion Slot Yes
Expansion Slot Info MicroSD, MicroSDHC, microSDXC (up to 512 GB)
PC Synchronization Yes
TV Out No
DLNA Support No
NFC Yes
Data Tethering Compatibility Yes
Java Applications No
Brew Applications No
ECML / Digital Wallet No
Camera
Main Camera
Aperture
ƒ/ 2.0
Resolution
48+ megapixels
Multi-camera
Yes
Zoom
No
Flash
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
MPEG-4
Video Recording Parameters
Full HD (1920 x 1080 pixels), 30 fps
Front Camera
Resolution
32+ megapixels
Zoom
No
Additional Front Camera Info
Aperture F2.2
Video Recording Parameters
Audio / Video
Audio Playback Yes
Audio Formats AAC, AAC+, AMR, eAAC+, MIDI, MP3, MP4, M4A, WMA, WAV
Radio Yes (FM)
Video Playback Yes
Video Playback Formats 3GP / 3GPP, FLV, H.264 / AVC, MPEG-4, WMV
Streaming Video Yes
External Speakers Yes
Headset Jack 3.5mm
Custom Ringtones Yes
Vibration Alert Yes
Downloadable Ringtones Yes
Ringer ID Yes
Haptic Feedback Vibration Yes
Speakerphone Yes
Apps
To-Do / Task List No
Calendar Yes
World Clock Yes
Alarm Yes
Stop Watch Yes
Timer Yes
Calculator Yes
Currency Converter No
Document Viewer Yes
Weather Yes
Stocks No
Maps Yes
NotePad Yes
Voice Memos / Recorder Yes
Games Downloadable
Apps Downloadable
Included Software / Apps
More
Additional comments
Related Links Manual (PDF)
Samsung Galaxy A51 Reviews
Where to buy Samsung Galaxy A51
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Critic Reviews


Talk Android

A decent phone

from Talk Android

The Galaxy A51 is a well-made smartphone with an interesting if unobtrusively pattern on the rear panel with all-day battery life, a fabulous AMOLED display, great customization options, and a dependable camera. Sadly, it’s let down by the sluggish processor and over-shadowed by handsets with s...More

The Galaxy A51 is a well-made smartphone with an interesting if unobtrusively pattern on the rear panel with all-day battery life, a fabulous AMOLED display, great customization options, and a dependable camera. Sadly, it’s let down by the sluggish processor and over-shadowed by handsets with similar price-points that have better cameras and more powerful chipsets.

Read full review

Less

Review Geek

Not great, not terrible, just extremely Samsung

from Review Geek

If you want the biggest screen possible at this price point, and you love tiny bezels and a pinhole camera, you might be able to see past shortcomings in fingerprint reader, software, and battery life. If you love the look (especially with that pretty back) and the extra storage for a ridiculous...More

If you want the biggest screen possible at this price point, and you love tiny bezels and a pinhole camera, you might be able to see past shortcomings in fingerprint reader, software, and battery life. If you love the look (especially with that pretty back) and the extra storage for a ridiculous amount of photos, it might just be the phone for you.

Read full review

Less

Android Authority

Great screen, bad performance

from Android Authority

With the A51, you’re getting a really great screen, decent build quality, some okay cameras, and even a headphone jack. While the build quality and screen are great, however, the sub-par performance of this phone is its Achilles heel.

Read full review

With the A51, you’re getting a really great screen, decent build quality, some okay cameras, and even a headphone jack. While the build quality and screen are great, however, the sub-par performance of this phone is its Achilles heel.

Read full review

Less

uSwitch

An excellent, wallet-friendly, alternative to Samsung's flagship handsets

from uSwitch

The Galaxy A51 is a good low-cost alternative to the very expensive Galaxy S20 or even S10. It offers a high-quality OLED screen, excellent design and the best software you’ll find on any Android phone. The plastic construction and less durable glass at the front are all acceptable compromises....More

The Galaxy A51 is a good low-cost alternative to the very expensive Galaxy S20 or even S10. It offers a high-quality OLED screen, excellent design and the best software you’ll find on any Android phone. The plastic construction and less durable glass at the front are all acceptable compromises. The same can be said for the camera, which is a good all-rounder as long as you stick with the standard shooting mode. The only drawback, and it is a major one, is the performance.

Read full review

Less

Pocket-lint

A mid-ranger with plenty of polish

from Pocket-lint

A great design and screen are the big sells of this mid-ranger, which performs generally well but can struggle a little when it comes to gaming tasks. Otherwise the clean software experience makes for a generally polished and affordable choice.

Read full review

A great design and screen are the big sells of this mid-ranger, which performs generally well but can struggle a little when it comes to gaming tasks. Otherwise the clean software experience makes for a generally polished and affordable choice.

Read full review

Less

Business Insider

A great smartphone in almost every respect

from Business Insider

Samsung had the difficult task of balancing performance with high-end features like a premium design, a gorgeous large screen, a triple-lens camera system, and long battery life. But in order to make those high-end features shine on a $400 phone, Samsung compromised too much on performance.

Read full review

Samsung had the difficult task of balancing performance with high-end features like a premium design, a gorgeous large screen, a triple-lens camera system, and long battery life. But in order to make those high-end features shine on a $400 phone, Samsung compromised too much on performance.

Read full review

Less

Engadget

It's not a bad phone, just a bad deal

from Engadget

Samsung’s Galaxy A51 packs a great screen, a handful of cameras, and a big battery -- what more could you ask from a mid-range smartphone? Well, more consistent performance, for one. Despite using a reasonably powerful chipset, the A51 is often plagued by slow app launches and laggy animations,...More

Samsung’s Galaxy A51 packs a great screen, a handful of cameras, and a big battery -- what more could you ask from a mid-range smartphone? Well, more consistent performance, for one. Despite using a reasonably powerful chipset, the A51 is often plagued by slow app launches and laggy animations, to the point when it sometimes feels like a device that costs much less. Battery life wasn’t as good as we had hoped for, either. While Samsung got a lot right with the Galaxy A51, it never feels as consistently nice to use as some of truly great devices available in its price range.

Read full review

Less

PC Magazine

A pretty good phone that can use a more powerful processor

from PC Magazine

At $400, Samsung's Galaxy A51 has a gorgeous display, good cameras, and a battery that will easily get you through the day, but it can use a boost in the processor department.

Read full review

At $400, Samsung's Galaxy A51 has a gorgeous display, good cameras, and a battery that will easily get you through the day, but it can use a boost in the processor department.

Read full review

Less

TechRadar

A good screen paired with less good performance

from TechRadar

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.

Read full review

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.

Read full review

Less

Wired

Sluggish performance and average cameras mire an otherwise fine Android phone

from Wired

The Galaxy A51 is a part of Samsung's push to dominate the low-end smartphone market, and on paper, it has all the makings of a great mid-range phone: a modern display with slim bezels, a big battery, versatile cameras, a headphone jack, and expandable storage—all for just $400. In reality, it'...More

The Galaxy A51 is a part of Samsung's push to dominate the low-end smartphone market, and on paper, it has all the makings of a great mid-range phone: a modern display with slim bezels, a big battery, versatile cameras, a headphone jack, and expandable storage—all for just $400. In reality, it's … fine. Its processing power resembles that of phones close to half its price, and despite four cameras on the back, the photos it snaps are unremarkable. The Galaxy A51 is fine. But fine just doesn't cut it these days, especially when you're Samsung.

Read full review

Less



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