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Big screen. Small price

A51's Infinity-O Display optimises visual symmetry. Now you can game, watch, surf and multi-task without interruption on a 6.5" FHD+ widescreen display—all powered by Super AMOLED technology. Enjoy a smartphone experience that minimises the bezel and maximises each inch of screen space.

Big screen. Small price

*Measured diagonally, the screen size is 6.5" in the full rectangle and 6.3" with accounting for the rounded corners. Actual viewable area is less due to the rounded corners and the camera cutout.

Awesome Quad camera to capture more

Go ultra high-res with a 48MP Main Cam for crisp, clear photos day and night. A 123° 12MP Ultra Wide Cam captures more of the view. Choose the upgraded 5MP Macro Cam for highly refined close-ups, and make sure the subject always stands out with the 5MP Depth Camera’s multiple Live Focus effects.

 
Awesome Quad camera to capture more
 

Capture more of the view from the same spot

Capture the wider world with the Ultra Wide Camera's wider field of vision. And with the 48MP Main Camera, your story stays bright and clear throughout the day.

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*Ultra wide experience (photo/video) is supported for rear camera only.

Macro Cam that captures the up-close details

Quad Cam’s built-in 5MP Macro Cam (40mm) shoots with clarity and quality, helping you bring out the ultra-fine details of your close-up shots. Apply and adjust natural background blur (Bokeh) to isolate your subject and increase its visual impact.

*Macro Camera feature supported for rear camera only.

 
Macro Cam that captures the up-close details
 

Shoots smooth and steady just like the pros

Galaxy A51 records like a pro-level action camera utilising the Ultra Wide Camera and predictive software. Super steady gives you smooth live videos, even when your journey is on the adventurous side.*

Shoots smooth and steady just like the pros

*Results may vary depending on shooting conditions including multiple subjects, being out of focus, or moving subjects. Viewing angle adjusted down for selfie with Ultra Wide Camera. Does not support zoom function. Performance of the image stabilization may vary depending on the light condition. Only available when shooting with the Ultra Wide Camera in Full HD.

Depth Camera brings your subject into the spotlight

The 5MP Depth Camera lets you adjust the depth of field before and after you nail the shot. The advanced 5MP Depth Camera knocks out unwanted background noise from your images to make them look more professional.

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Attention-grabbing selfies made easy

You want your selfie to look good. So for stunning daytime looks, Galaxy A51's 32MP front camera gives you clear, high-resolution photos. And with Selfie focus to gently blur the background, your face becomes the star.

 
Attention-grabbing selfies made easy
 

Long lasting battery at no extra charge

When out living life, you need a phone that can last. A 4,000mAh (typical)* battery gives you the power to stream, share and game on. And if you start running low, plug in and power up with 15W Fast Charging.

Power that keeps you going

*Typical value tested under third-party laboratory condition. Typical value is the estimated average value considering the deviation in battery capacity among the battery samples tested under IEC 61960 standard. Rated (minimum) capacity is 3,890 mAh. Actual battery life may vary depending on network environment, usage patterns and other factors.


Premium storage at no extra cost

Galaxy A51 has fast processing and spacious storage, so you can focus on now. An advanced Octa-core processor and up to 4GB of RAM deliver smooth and efficient performance. Download more and delete less with up to 128GB internal storage. Add even more with a 512GB microSD card.*

Give yourself more room to play

*MicroSD card sold separately. External memory can be used to store media (photos, video and music files) but no applications.


Game Booster gives you the edge

Maximise performance with Game Booster. Cut distractions and up your game with a dedicated interface and easy-to-reach menu. Frame Booster gives graphics smooth, life-like motion. And play at your best as Game Booster learns your usage patterns to optimise battery, temperature and memory.

Game Booster gives you the edge

Defence-grade security available to everyone

Built into the phone's hardware and software from the start, Samsung Knox protects your phone from the minute it's turned on. Offering multi-layered security, it defends your most sensitive information from malware and malicious threats.

Defence-grade security available to everyone

Your fingerprint is the key

Galaxy A51 comes with high-tech biometric authentication. The On-Screen Fingerprint scanner recognises your unique fingerprint, so you are the only one who can press and unlock in one easy move.

Your fingerprint is the key

*If you use a screen protector, make sure it allows for use of the On-screen fingerprint sensor.

Do more with Bixby


Made to focus

One UI helps you focus on what really matters to you. Hardware and software work together, with content and features at your fingertips so you can get to them faster. Use Night Mode for a comfortable experience in the dark, and with clear and intuitive visuals using your phone is like second nature.

Made to focus

Keep your device in tip top condition with us

Enjoy peace of mind when you choose to buy a Galaxy smartphone. The Interactive diagnostics and optimisation on Samsung Members app makes it easy to tune up the performance of your devices, while our helpline lets you troubleshoot problems when you need the extra assistance.

Keep your device in tip top condition with us


  • 2.3GHz, 1.7GHzCPU Speed
  • 172Weight (g)
  • Up to 87Audio Playback Time (Hours)
  • 128ROM Size (GB)
  • Processor
    • CPU Speed2.3GHz, 1.7GHz
    • CPU TypeOcta-Core
  • Display
    • Size (Main_Display)164.0mm (6.5" full rectangle) / 160.9mm (6.3" rounded corners)
    • Resolution (Main Display)1080 x 2400 (FHD+)
    • Technology (Main Display)Super AMOLED
    • Color Depth (Main Display)16M
  • Camera
    • Rear Camera - Resolution (Multiple)48.0 MP + 12.0 MP + 5.0 MP + 5.0 MP
    • Rear Camera - F Number (Multiple)F2.0 , F2.2 , F2.4 , F2.2
    • Rear Camera - Auto FocusYes
    • Rear Camera - OISNo
    • Rear Camera ZoomDigital Zoom up to 8x
    • Front Camera - Resolution32.0 MP
    • Front Camera - F NumberF2.2
    • Front Camera - Auto FocusNo
    • Front Camera - OISNo
    • Rear Camera - FlashYes
    • Front Camera - FlashNo
    • Video Recording ResolutionUHD 4K (3840 x 2160)@30fps
    • Slow Motion240fps @HD
  • Memory
    • RAM_Size (GB)4
    • ROM Size (GB)128
    • Available Memory Size (GB)*107.0
    • External Memory SupportMicroSD (Up to 512GB)
  • Network/Bearer
    • Number of SIMDual-SIM
    • SIM sizeNano-SIM (4FF)
    • SIM Slot TypeSIM 1 + SIM 2 + MicroSD
    • Infra2G GSM, 3G WCDMA, 4G LTE FDD, 4G LTE TDD
    • 2G GSMGSM850, GSM900, DCS1800, PCS1900
    • 3G UMTSB1(2100), B2(1900), B4(AWS), B5(850), B8(900)
    • 4G FDD LTEB1(2100), B2(1900), B3(1800), B4(AWS), B5(850), B7(2600), B8(900), B12(700), B13(700), B17(700), B20(800), B26(850), B28(700), B66(AWS-3)
    • 4G TDD LTEB38(2600), B40(2300), B41(2500)
  • Connectivity
    • ANT+Yes
    • USB InterfaceUSB Type-C
    • USB VersionUSB 2.0
    • Location TechnologyGPS, Glonass, Beidou, Galileo
    • Earjack3.5mm Stereo
    • MHLNo
    • Wi-Fi802.11 a/b/g/n/ac 2.4G+5GHz, VHT80
    • Wi-Fi DirectYes
    • Bluetooth VersionBluetooth v5.0 (LE up to 2 Mbps)
    • NFCYes
    • PC Sync.Smart Switch (PC version)
  • OSAndroid
  • General Information
    • Form FactorTouchscreen Bar
  • SensorsAccelerometer, Fingerprint Sensor, Gyro Sensor, Geomagnetic Sensor, Hall Sensor, Light Sensor, Virtual Proximity Sensing
  • Physical specification
    • Dimension (HxWxD, mm)158.5 x 73.6 x 7.9
    • Weight (g)172
  • Battery
    • Internet Usage Time(LTE) (Hours)Up to 15
    • Internet Usage Time(Wi-Fi) (Hours)Up to 16
    • Video Playback Time (Hours)Up to 20
    • Battery Capacity (mAh, Typical)4000
    • RemovableNo
    • Audio Playback Time (Hours)Up to 87
    • Talk Time (4G LTE) (Hours)Up to 32
  • Audio and Video
    • Stereo SupportNo
    • Video Playing FormatMP4, M4V, 3GP, 3G2, WMV, ASF, AVI, FLV, MKV, WEBM
    • Video Playing ResolutionUHD 4K (3840 x 2160)@120fps
    • Audio Playing FormatMP3, M4A, 3GA, AAC, OGG, OGA, WAV, WMA, AMR, AWB, FLAC, MID, MIDI, XMF, MXMF, IMY, RTTTL, RTX, OTA