Samsung Galaxy S20 Ultra 5G vs. Samsung Galaxy A51 5G

Phone Comparison, Reviews and Tests

Detailed comparison and review of Samsung Galaxy S20 Ultra 5G and Samsung Galaxy A51 5G. With our comprehensive overview, you can simply compare sizes, functions, but also other key features of both phones and easily decide which one is the right choice for you. Our goal is to help you identify the main differences between products and find the phone that best fits your needs and expectations.

Phone Specifications Comparison

Samsung Galaxy S20 Ultra 5G vs. Samsung Galaxy A51 5G Comparison Chart
DESIGN AND DIMENSIONS Samsung Galaxy S20 Ultra 5G Samsung Galaxy A51 5G
Product Type Smartphone Smartphone
Manufacturer Model Number SM-G988B/DS SM-A516B/DS
Form Factor Touch Touch
Height 166.9 mm 158.9 mm Samsung Galaxy S20 Ultra 5G has greater height than Samsung Galaxy A51 5G.
Width 76 mm 73.6 mm Samsung Galaxy S20 Ultra 5G has greater width than Samsung Galaxy A51 5G.
Depth 8.8 mm 8.7 mm Samsung Galaxy A51 5G is narrower than Samsung Galaxy S20 Ultra 5G.
Weight 220 g 187 g Samsung Galaxy A51 5G is lighter than Samsung Galaxy S20 Ultra 5G.
Body Colour Cosmic black | Cosmic grey | Cloud white Prism cube black | Prism cube white
Protection Dustproof, splashproof, water-resistant -
Waterproof (Water-resistant) Yes - Samsung Galaxy S20 Ultra 5G is waterproof.
IP rating IP68 -
SAR Value 1.557 W/kg (body), 0.66 W/kg (head) 1.555 W/kg (body), 0.496 W/kg (head)
Connector Type USB Type-C - 24 pin USB-C USB Type-C - 24 pin USB-C
Headset jack - mini-phone 3.5mm
SIM Card Type (Size) Nano SIM, Electronic SIM card (e-SIM) Nano SIM
SIM Card Qty Dual-SIM Dual-SIM
SIM Card Configuration Details Nano SIM + nano SIM/microSD Nano SIM + nano SIM/microSD
DISPLAY Samsung Galaxy S20 Ultra 5G Samsung Galaxy A51 5G
Display Type OLED display OLED display
Display Technology Infinity-O Dynamic AMOLED 2X Infinity-O Super AMOLED
Screen Size (Display Size) 6.9" 6.5" Samsung Galaxy S20 Ultra 5G has larger screen size than Samsung Galaxy A51 5G.
Screen Resolution (Display Resolution) 3200 x 1440 pixels 2400 x 1080 pixels Samsung Galaxy S20 Ultra 5G has better screen resolution than Samsung Galaxy A51 5G.
Display Format QHD+ Full HD+
Pixel Density 511 ppi -
Colour Depth 16.7 million colours 16.7 million colours Both phones have the same color depth.
HDR Yes - Samsung Galaxy S20 Ultra 5G has HDR.
HDR Technology HDR10+ -
Display Refresh Rate 120 Hz -
Display Features Edge Screen, DCI-P3 Wide colour gamut, AOD(Always On Display), Edge Lighting Edge-to-Edge screen
PROCESSOR Samsung Galaxy S20 Ultra 5G Samsung Galaxy A51 5G
Processor Type (CPU) Samsung Exynos 990 -
Clock Speed 2.73 GHz 2.2 GHz Samsung Galaxy S20 Ultra 5G has higher clock speed than Samsung Galaxy A51 5G.
Processor Core Qty 8-core 8-core Both phones have the same number of phone cores.
64-bit Architecture Yes Yes Both phones have 64-bit architecture.
MEMORY Samsung Galaxy S20 Ultra 5G Samsung Galaxy A51 5G
RAM LPDDR5 SDRAM - 12 GB 6 GB Samsung Galaxy S20 Ultra 5G has more RAM than Samsung Galaxy A51 5G.
Internal Memory Size (Storage Capacity) 128 GB 128 GB Both phones have the same internal memory capacity.
User Memory 104 GB 105.3 GB
Supported Flash Memory Cards (Expandable Memory) microSDHC, microSDXC - up to 1 TB microSDHC, microSDXC - up to 1 TB
CAMERA Samsung Galaxy S20 Ultra 5G Samsung Galaxy A51 5G
MAIN CAMERA
Number of Main Cameras 4 4
Sensor Resolution 108 Megapixel 48 Megapixel Samsung Galaxy S20 Ultra 5G has better camera resolution than Samsung Galaxy A51 5G.
Sensor Size 1/1.33" -
Lens Type Wide-angle lens -
Lens Aperture F/1.8 F/2.0 Samsung Galaxy S20 Ultra 5G has better lens aperture than Samsung Galaxy S20 Ultra 5G.
Field of View (FoV) 79 degree(s) -
Pixel Size 0.8 μm -
Optical Image Stabiliser (OIS) Optical Image Stabiliser (OIS) - Samsung Galaxy S20 Ultra 5G has optical stabilisation.
Focus Adjustment Automatic, manual Automatic
Optical Zoom 10x -
Digital Zoom 100x 8x Samsung Galaxy S20 Ultra 5G has better digital zoom than Samsung Galaxy A51 5G.
Self-Timer Delay Yes -
Special Effects HDR, Bokeh effect, Grid Line, Motion photos, video bokeh effect Bokeh effect
Camera Modes Panorama, Slow motion mode, Pro mode, HYPERLAPSE, Super Slow-mo, Flowers, Greenery, Trees, Sky, Beaches, Watersides, Snow, Backlit, Text, Food, Face, Baby, Person, Dog, Cat, People, Sunset, Sunrise, City, Waterfall, Scenery, Stage, Vehicles, Drinks, Animal, Shoes, Indoor, Clothes, Night view, Live focus video, Night, Mountain, Pro Video mode, Single Take Slow motion video
Face Recognition (Face ID) Face detection - Samsung Galaxy S20 Ultra 5G has face detection.
White Balance Custom, automatic -
Light Source High CRI LED flash LED flash
Video Resolutions 1920 x 1080 (1080p) at 60 fps, 1280 x 720 (720p) at 30 fps, 3840 x 2160 (4K) at 60 fps, Super slow motion video 1280 x 720 (720p) at 960 fps, Slo-mo video 1920 x 1080 (1080p) at 240 fps, 7680 x 4320 (8K) at 24 fps Slo-mo video 1280 x 720 (720p) at 240 fps, 3840 x 2160 (4K) at 30 fps, Slo-mo video 1280 x 720 (720p) at 480 fps
Camera Features (Functions) Quick Launch, Playback zoom, Phase Detect Auto-Focus (PDAF), blink detection, VDIS (Video Digital Image Stabilisation), Live Focus, Tracking AF, Video location tags, Quick Share, location tags, Hyperlapse video support 1080p, Scene Optimiser, Full view, Flaw detection, Shot suggestions, AR Emoji, blur detection, HDR10+ recording, Floating shutter button, Super steady, Quick Measure, Space Zoom, 33MP still photos while playing 8K video, 100x Super Resolution Zoom, 10x Hybrid Optic Zoom, 3D Scanner Live Focus, background blur
SECOND CAMERA
Sensor Resolution (2nd Camera) 12 Megapixel 12 Megapixel Both phones have the same second camera resolution.
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) 120 degree(s) 123 degree(s) Samsung Galaxy A51 5G has larger second camera lens field of view than Samsung Galaxy S20 Ultra 5G.
Pixel Size (2nd Camera) 1.4 μm -
THIRD CAMERA
Sensor Resolution (3rd Camera) 48 Megapixels 5 Megapixel Samsung Galaxy S20 Ultra 5G has higher resolution third camera than Samsung Galaxy A51 5G.
Lens Type (3rd Camera) Telephoto lens -
Lens Aperture (3rd Camera) F/3.5 F/2.4 Samsung Galaxy A51 5G has better third camera lens aperture than Samsung Galaxy S20 Ultra 5G.
Field of View (3rd Camera) 24 degree(s) -
Pixel Size (3rd Camera) 0.8 μm -
Camera Functions (3rd Camera) - Macro camera
FOURTH CAMERA
Sensor Resolution (4th Camera) 0.3 Megapixel 5 Megapixel Samsung Galaxy A51 5G has higher resolution fourth camera than Samsung Galaxy S20 Ultra 5G.
Lens Aperture (4th Camera) F/1.0 F/2.2 Samsung Galaxy S20 Ultra 5G has better fourth camera lens aperture than Samsung Galaxy S20 Ultra 5G.
Camera Functions (4th Camera) DepthVision camera Depth camera
FRONT CAMERA
Number of Front Cameras 1 1
Sensor Resolution (Front) 40 Megapixels 32 Megapixel Samsung Galaxy S20 Ultra 5G has better front camera resolution than Samsung Galaxy A51 5G.
Lens Aperture (Front) F/2.2 F/2.2 Both phones have the same front camera lens aperture.
Field of View (Front) 80 degree(s) -
Pixel Size (Front) 0.7 μm -
Focus Adjustment Automatic Focus free
Camera Features (Front) Phase Detect Auto-Focus (PDAF) -
BATTERY AND CHARGING Samsung Galaxy S20 Ultra 5G Samsung Galaxy A51 5G
Battery Capacity (Battery Size) 5000 mAh 4500 mAh Samsung Galaxy S20 Ultra 5G has larger battery capacity than Samsung Galaxy A51 5G.
Fast Charging Technology Qualcomm Quick Charge 2.0, Adaptive Fast Charging, Samsung Super Fast Charging - Samsung Galaxy S20 Ultra 5G has fast charging technology.
Wireless Charging Yes - Samsung Galaxy S20 Ultra 5G can be charged wirelessly.
Wireless Charging Standards WPC, Qi, Fast Wireless Charging 2.0, Wireless PowerShare -
Talk Time 1500 minutes 1380 minutes Samsung Galaxy S20 Ultra 5G has longer battery life when making calls than Samsung Galaxy A51 5G.
Run Time Details Talk (LTE): up to 1500 min
Active online usage (LTE): up to 17 hrs
Active online usage (Wi-Fi): up to 18 hrs
Talk (4G): up to 1380 min
Active online usage (LTE): up to 16 hrs
Active online usage (Wi-Fi): up to 17 hrs
Playback (video): up to 19 hrs
Playback (audio): up to 86 hrs
CELLULAR Samsung Galaxy S20 Ultra 5G Samsung Galaxy A51 5G
Technology WCDMA (UMTS) / GSM WCDMA (UMTS) / GSM
Mobile Broadband Generation 5G 5G Both phones have the same mobile network generation.
Operating System Android 10 -
User Interface Samsung One UI 2 -
Intelligent Assistant Bixby Bixby
Payment Technology Samsung Pay -
Navigation GPS, GLONASS, BeiDou, Galileo GPS, GLONASS, BeiDou, Galileo
COMMUNICATIONS Samsung Galaxy S20 Ultra 5G Samsung Galaxy A51 5G
Data Transmission GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE, 5G NR FR1 GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE, 5G NR FR1
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 5, Band 8
3G UMTS Frequency 2100, 1900, 1700, 850, 900 2100, 1900, 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 18, Band 19, Band 20, Band 25, Band 26, Band 28, Band 32, Band 38, Band 39, Band 40, Band 41, Band 66 Band 1, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 20, Band 28, Band 38, Band 40, Band 41
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 lower, FDD 800 upper, FDD 800 DD, FDD 1900+, FDD 850+, FDD 700 APT, FDD 1500 L, TDD 2600, TDD 1900, TDD 2300, TDD 2500, FDD 1700 - 2110 AWS-3 FDD 2100, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500
5G NR Band N1, n3, n5, n7, n8, n28, n77, n78, n40 N41, n78
5G NR Frequency FDD 2100, FDD 1800, FDD 850, FDD 2600, FDD 900, FDD 700APT, TDD TD 3700, TDD TD 3500, TDD 2300 TDD TD 2500, TDD TD 3500
Wireless Interface IEEE 802.11a/b/g/n/ac, ANT+/ANT, IEEE 802.11a/b/g/n/ac/ax IEEE 802.11a/b/g/n/ac, ANT+
Bluetooth Bluetooth 5.0 Bluetooth 5.0
NFC Yes Yes Both phones have an NFC reader for mobile payments.
Messaging Services SMS, MMS SMS, MMS
MEDIA Samsung Galaxy S20 Ultra 5G Samsung Galaxy A51 5G
Supported Digital Audio Standards WAV, WMA, AAC, PCM, AMR, MP3, FLAC, XMF, OGG, MIDI, APE (Monkey's Audio), M4A, DSF, DSD, MXMF, OGA, 3GA, AWB, IMY, RTTTL, RTX, OTA, DFF, MID, DSD64, DSD128 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, WMV, ASF, 3GP, M4V, WebM, 3G2, MP4
Sound Enhancements Dolby Digital Plus sound, Dolby Atmos sound technology, Surround sound, stereo speakers tuned by AKG, Dolby Digital sound -
FEATURES Samsung Galaxy S20 Ultra 5G Samsung Galaxy A51 5G
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, proximity sensor, barometer, gyro sensor, hall sensor, RGB sensor, geomagnetic sensor Accelerometer, ambient light sensor, gyro sensor, hall sensor, geomagnetic sensor
Security Devices Fingerprint reader (under display), face recognition Fingerprint reader (under display)
Additional Phone Features Smart Select, MU-MIMO technology, Fast Charging, Samsung KNOX, High AOP Mic, Smart View, Live message, Samsung DeX support, Bixby Vision, Secure Folder function, Dual Audio, Bixby Routines, Intelligent Performance Enhancer, AR Doodle, Bixby key, 3D Scanner Fast Charging, Samsung KNOX, Bixby Vision, Bixby Routines, Virtual Proximity Sensing
OTHERS Samsung Galaxy S20 Ultra 5G Samsung Galaxy A51 5G
Included Accessories Power adapter, SIM card removal tool, USB-C cable, headset (tuned by AKG), clear cover case, protective film Power adapter
Compliant Standards VDE, IP68, SGS -
Max Depth of Water Resistance 1.5 m -
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