Samsung Galaxy A51 vs. Samsung Galaxy A31

Phone Comparison, Reviews and Tests

Side by side comparison and review of Samsung Galaxy A51 and Samsung Galaxy A31. Compare sizes, cameras, batteries, memory capacities and other key specifications and features to simplify the choice of your perfect phone. Our goal is to make it easier for you to decide on the phone that will best meet your expectations by revealing the main differences between the products.

Phone Specifications Comparison

Samsung Galaxy A51 vs. Samsung Galaxy A31 Comparison Chart
DESIGN AND DIMENSIONS Samsung Galaxy A51 Samsung Galaxy A31
Product Type Smartphone Smartphone
Manufacturer Model Number SM-A515F/DSN SM-A315G/DS
Form Factor Touch Touch
Height 158.5 mm 159.3 mm Samsung Galaxy A31 has greater height than Samsung Galaxy A51.
Width 73.6 mm 73.1 mm Samsung Galaxy A51 has greater width than Samsung Galaxy A31.
Depth 7.9 mm 8.6 mm Samsung Galaxy A51 is narrower than Samsung Galaxy A51.
Weight 172 g 185 g Samsung Galaxy A51 is lighter than Samsung Galaxy A51.
Body Colour Silver | Prism crush black | Haze crush silver | Prism crush blue | Prism crush white Prism crush black
Waterproof (Water-resistant) - -
SAR Value 0.369 W/kg (head), 1.59 W/kg (body), 2.93 W/kg (limb) 1.68 W/kg (body), 0.488 W/kg (head)
Connector Type USB Type-C - 24 pin USB-C
Headset jack - mini-phone 3.5mm
USB Type-C - 24 pin USB-C
Headset jack - mini-phone 3.5mm
SIM Card Type (Size) Nano SIM Nano SIM
SIM Card Qty Dual-SIM Dual-SIM
DISPLAY Samsung Galaxy A51 Samsung Galaxy A31
Display Type OLED display OLED display
Display Technology Super AMOLED Super AMOLED
Screen Size (Display Size) 6.5" 6.4" Samsung Galaxy A51 has larger screen size than Samsung Galaxy A31.
Screen Resolution (Display Resolution) 2400 x 1080 pixels 2400 x 1080 pixels Both phones have the same screen resolution.
Display Format Full HD+ Full HD+
Pixel Density 408 ppi -
Colour Depth 16.7 million colours 16.7 million colours Both phones have the same color depth.
Display Features Edge-to-Edge screen, Infinity O display Night mode, Edge-to-Edge screen, Infinity U Display
PROCESSOR Samsung Galaxy A51 Samsung Galaxy A31
Processor Type (CPU) Samsung Exynos 9611 -
Clock Speed 2.3 GHz 2 GHz Samsung Galaxy A51 has higher clock speed than Samsung Galaxy A31.
Processor Core Qty 8-core 8-core Both phones have the same number of phone cores.
64-bit Architecture Yes - Samsung Galaxy A51 has 64-bit architecture.
MEMORY Samsung Galaxy A51 Samsung Galaxy A31
RAM 4 GB 4 GB Both phones have the same RAM size.
Internal Memory Size (Storage Capacity) 128 GB 64 GB Samsung Galaxy A51 has more internal memory than Samsung Galaxy A31.
User Memory 107 GB 46.2 GB
Supported Flash Memory Cards (Expandable Memory) microSDHC, microSDXC - up to 512 GB microSDHC, microSDXC - up to 512 GB
CAMERA Samsung Galaxy A51 Samsung Galaxy A31
MAIN CAMERA
Number of Main Cameras 4 4
Sensor Resolution 48 Megapixel 48 Megapixel Both phones have the same camera resolution.
Lens Aperture F/2.0 F/2.0 Both phones have the same camera lens aperture.
Field of View (FoV) - 80 degree(s)
Focus Adjustment Automatic Automatic
Digital Zoom 8x 8x Both phones have the same digital zoom.
Camera Modes Slow motion mode, Live Focus mode Depth bokeh
Light Source LED flash LED flash
Video Resolutions Slo-mo video 1280 x 720 (720p) at 240 fps, 3840 x 2160 (4K) at 30 fps 1920 x 1080 (1080p) at 30 fps
Camera Features (Functions) AR sticker, background blur, Scene Optimiser, Eye blink, Flaw detection, Stamp, Facial blur Live Focus
SECOND CAMERA
Sensor Resolution (2nd Camera) 12 Megapixel 8 Megapixel Samsung Galaxy A51 has better second camera resolution than Samsung Galaxy A31.
Lens Type (2nd Camera) Ultra wide-angle lens Ultra wide-angle lens
Lens Aperture (2nd Camera) F/2.2 F/2.2 Both phones have the same second camera lens aperture.
Field of View (2nd Camera) 123 degree(s) 123 degree(s) Both phones have the same second camera lens field of view.
Minimum Focal Length (2nd Camera) - 40 mm
Camera Functions (2nd Camera) - Macro camera
THIRD CAMERA
Sensor Resolution (3rd Camera) 5 Megapixel 5 Megapixel Both phones have the same third camera resolution.
Lens Aperture (3rd Camera) F/2.4 F/2.4 Both phones have the same lens aperture of the third camera.
Camera Functions (3rd Camera) Macro camera Depth camera
FOURTH CAMERA
Sensor Resolution (4th Camera) 5 Megapixel 5 Megapixel Both phones have the same resolution of the fourth camera.
Lens Type (4th Camera) Telephoto lens -
Lens Aperture (4th Camera) F/2.2 F/2.4 Samsung Galaxy A51 has better fourth camera lens aperture than Samsung Galaxy A51.
Camera Functions (4th Camera) Depth camera Depth camera
FRONT CAMERA
Number of Front Cameras 1 1
Sensor Resolution (Front) 32 Megapixel 20 Megapixel Samsung Galaxy A51 has better front camera resolution than Samsung Galaxy A31.
Lens Aperture (Front) F/2.2 F/2.2 Both phones have the same front camera lens aperture.
Focus Adjustment Focus free Focus free
BATTERY AND CHARGING Samsung Galaxy A51 Samsung Galaxy A31
Battery Capacity (Battery Size) 4000 mAh 5000 mAh Samsung Galaxy A31 has larger battery capacity than Samsung Galaxy A51.
Talk Time 1920 minutes 1980 minutes Samsung Galaxy A31 has longer battery life when making calls than Samsung Galaxy A51.
Run Time Details Active online usage (LTE): up to 15 hrs
Active online usage (Wi-Fi): up to 16 hrs
Playback (video): up to 20 hrs
Playback (audio): up to 87 hrs
Talk (4G): up to 1920 min
Active online usage (LTE): up to 20 hrs
Active online usage (Wi-Fi): up to 20 hrs
Playback (video): up to 22 hrs
Playback (audio): up to 97 hrs
Talk (LTE): up to 1980 min
Battery Technology Lithium Ion -
CELLULAR Samsung Galaxy A51 Samsung Galaxy A31
Technology WCDMA (UMTS) / GSM WCDMA (UMTS) / GSM
Mobile Broadband Generation 4G 4G Both phones have the same mobile network generation.
Operating System Android 10 Android 10
User Interface One UI One UI
Intelligent Assistant Bixby -
Payment Technology - Samsung Pay
Navigation GPS, GLONASS, BeiDou, Galileo GPS, GLONASS, BeiDou, Galileo
COMMUNICATIONS Samsung Galaxy A51 Samsung Galaxy A31
Data Transmission GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE
2G Band 850 GSM, 900 GSM, 1800 GSM, 1900 GSM 850 GSM, 900 GSM, 1800 GSM, 1900 GSM
3G UMTS Band Band 1, Band 2, Band 4, Band 5, Band 8 Band 1, Band 2, Band 4, Band 5, Band 8
3G UMTS Frequency 2100, 1900, 1700, 850, 900 2100, 1900, 1700, 850, 900
4G LTE Band Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 13, Band 17, Band 20, Band 26, Band 28, Band 38, Band 40, Band 41, Band 66 Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 13, Band 17, Band 20, Band 28, Band 38, Band 40, Band 41, Band 66
4G LTE Frequency FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700c, FDD 700b, FDD 800 DD, FDD 850+, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500, FDD 1700 - 2110 AWS-3 FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700c, FDD 700b, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500, FDD 1700 - 2110 AWS-3
Wireless Interface IEEE 802.11a/b/g/n/ac, ANT+ IEEE 802.11a/b/g/n/ac
Bluetooth Bluetooth 5.0 LE Bluetooth 5.0
Bluetooth Profiles HFP, HSP, OPP, PAN, A2DP, AVRCP, HID, SAP, PBAP, MAP, HOGP -
NFC Yes Yes Both phones have an NFC reader for mobile payments.
Messaging Services SMS, MMS SMS, MMS
MEDIA Samsung Galaxy A51 Samsung Galaxy A31
Supported Digital Audio Standards WAV, WMA, AAC, AMR, MP3, FLAC, XMF, OGG, MIDI, M4A, MXMF, OGA, 3GA, AWB, IMY, RTTTL, RTX, OTA, MID WAV, WMA, AAC, AMR, MP3, FLAC, XMF, OGG, MIDI, M4A, MXMF, OGA, 3GA, AWB, IMY, RTTTL, RTX, OTA, MID
Supported Digital Video Standards MKV, FLV, AVI, WMV, ASF, 3GP, M4V, WebM, 3G2, MP4 MKV, FLV, AVI, MPEG-4, WMV, ASF, 3GP, M4V, WebM, 3G2
FEATURES Samsung Galaxy A51 Samsung Galaxy A31
Phone Functions Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert
Sensors Accelerometer, ambient light sensor, proximity sensor, gyro sensor, hall sensor, geomagnetic sensor Accelerometer, ambient light sensor, proximity sensor, gyro sensor, hall sensor, geomagnetic sensor
Security Devices Fingerprint reader (under display) Fingerprint reader (under display)
Additional Phone Features Fast Charging, Samsung KNOX, Bixby Vision, Game Booster, Bixby Routines Samsung KNOX, Game Booster, Samsung Smart Switch, Virtual Proximity Sensing
OTHERS Samsung Galaxy A51 Samsung Galaxy A31
Included Accessories Power adapter Power adapter
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