Samsung Galaxy A51 vs. Microsoft Surface Duo 2

Phone Comparison, Reviews and Tests

In depth comparison and review of Samsung Galaxy A51 and Microsoft Surface Duo 2. Compare sizes, cameras, batteries, memory, and other important specifications and features to easily choose the right phone for you. Our goal is to help you uncover differences between the products and find the phone that will best fit your needs.

Phone Specifications Comparison

Samsung Galaxy A51 vs. Microsoft Surface Duo 2 Comparison Chart
DESIGN AND DIMENSIONS Samsung Galaxy A51 Microsoft Surface Duo 2
Product Type Smartphone Smartphone
Manufacturer Model Number SM-A515F/DSN -
Form Factor Touch Folder - dual screen
Height 158.5 mm 145.2 mm Samsung Galaxy A51 has greater height than Microsoft Surface Duo 2.
Width 73.6 mm 92.1 mm Microsoft Surface Duo 2 has greater width than Samsung Galaxy A51.
Depth 7.9 mm 11 mm Samsung Galaxy A51 is narrower than Samsung Galaxy A51.
Weight 172 g 284 g Samsung Galaxy A51 is lighter than Samsung Galaxy A51.
Dimensions Details - Unfolded - 184.5 mm x 5.5 mm x 145.2 mm
Body Colour Silver | Prism crush black | Haze crush silver | Prism crush blue | Prism crush white Glacier | Obsidian
Body Material - Corning Gorilla Glass
Waterproof (Water-resistant) - -
Repairability Index - 3.9 (out of 10)
SAR Value 0.369 W/kg (head), 1.59 W/kg (body), 2.93 W/kg (limb) 0.726 W/kg (head), 1.478 W/kg (body)
Connector Type USB Type-C - 24 pin USB-C
Headset jack - mini-phone 3.5mm
USB Type-C - 24 pin USB-C
SIM Card Type (Size) Nano SIM Nano SIM, Electronic SIM card (e-SIM)
SIM Card Qty Dual-SIM Dual-SIM
DISPLAY Samsung Galaxy A51 Microsoft Surface Duo 2
Display Type OLED display OLED display
Display Technology Super AMOLED AMOLED
Foldable Display - Yes
Display Design - Both directions folding
Screen Size (Display Size) 6.5" 5.8" Samsung Galaxy A51 has larger screen size than Microsoft Surface Duo 2.
Screen Resolution (Display Resolution) 2400 x 1080 pixels 1344 x 1892 pixels Samsung Galaxy A51 has better screen resolution than Microsoft Surface Duo 2.
Display Format Full HD+ -
Pixel Density 408 ppi 401 ppi Samsung Galaxy A51 has better pixel density than Microsoft Surface Duo 2.
Aspect Ratio - 13:9
Max Brightness - 800 cd/m²
Colour Depth 16.7 million colours -
HDR - Yes Microsoft Surface Duo 2 has HDR.
Display Refresh Rate - 90 Hz
Display Features Edge-to-Edge screen, Infinity O display DCI-P3 Wide colour gamut, 100% sRGB, Dual PixelSense Fusion Displays
Display Protection (Screen Protector) - Corning Gorilla Glass Victus (scratch resistant glass)
SECOND DISPLAY
Second Display Type - OLED display - colour
Second Display Screen Size - 5.8"
Second Display Resolution - 1344 x 1892 pixels
UNFOLDED DISPLAY
Unfolded Display Screen Size - 8.3 in
Unfolded Display Resolution - 2688 x 1892 pixels
PROCESSOR Samsung Galaxy A51 Microsoft Surface Duo 2
Processor Type (CPU) Samsung Exynos 9611 Qualcomm Snapdragon 888 5G
Clock Speed 2.3 GHz -
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 Microsoft Surface Duo 2
RAM 4 GB LPDDR5 SDRAM - 8 GB Microsoft Surface Duo 2 has more RAM than Samsung Galaxy A51.
Internal Memory Size (Storage Capacity) 128 GB 128 GB Both phones have the same internal memory capacity.
User Memory 107 GB -
Supported Flash Memory Cards (Expandable Memory) microSDHC, microSDXC - up to 512 GB -
CAMERA Samsung Galaxy A51 Microsoft Surface Duo 2
MAIN CAMERA
Number of Main Cameras 4 3
Sensor Resolution 48 Megapixel 12 Megapixel Samsung Galaxy A51 has better camera resolution than Microsoft Surface Duo 2.
Lens Aperture F/2.0 F/1.7 Microsoft Surface Duo 2 has better lens aperture than Samsung Galaxy A51.
Pixel Size - 1.4 μm
Optical Image Stabiliser (OIS) - Optical Image Stabiliser (OIS) Microsoft Surface Duo 2 has optical stabilisation.
Focus Adjustment Automatic -
Digital Zoom 8x 10x Microsoft Surface Duo 2 has better digital zoom than Samsung Galaxy A51.
Special Effects - HDR
Camera Modes Slow motion mode, Live Focus mode Night mode, Auto mode, low-light shots, Panorama mode with wide dynamic range, slow motion video at 120 or 240fps
Light Source LED flash Dual 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, 1920 x 1080 (1080p) at 60 fps, 3840 x 2160 (4K) at 30 fps, 3840 x 2160 (4K) at 60 fps
Camera Features (Functions) AR sticker, background blur, Scene Optimiser, Eye blink, Flaw detection, Stamp, Facial blur Dual Pixel Phase Detect Auto-Focus (PDAF), Smooth Zoom, HEVC (High Efficiency Video coding), HDR video recording, multi-frame photo capture, dynamic range scene detection
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 Telephoto lens
Lens Aperture (2nd Camera) F/2.2 F/2.4 Samsung Galaxy A51 has better second camera lens aperture than Samsung Galaxy A51.
Field of View (2nd Camera) 123 degree(s) -
Pixel Size (2nd Camera) - 1 μm
Optical Image Stabiliser (OIS) - Optical Image Stabiliser (OIS) Microsoft Surface Duo 2 has optical stabilisation of the second camera.
Optical Zoom - 2x
Camera Features (2nd Camera) - Phase Detect Auto-Focus (PDAF)
THIRD CAMERA
Sensor Resolution (3rd Camera) 5 Megapixel 16 Megapixel Microsoft Surface Duo 2 has higher resolution third camera than Samsung Galaxy A51.
Lens Type (3rd Camera) - Ultra wide-angle lens
Lens Aperture (3rd Camera) F/2.4 F/2.2 Microsoft Surface Duo 2 has better third camera lens aperture than Samsung Galaxy A51.
Field of View (3rd Camera) - 110 degree(s)
Pixel Size (3rd Camera) - 1 μm
Camera Functions (3rd Camera) Macro camera -
Camera Features (3rd Camera) - Field of view, distortion correction
FOURTH CAMERA
Sensor Resolution (4th Camera) 5 Megapixel -
Lens Type (4th Camera) Telephoto lens -
Lens Aperture (4th Camera) F/2.2 -
Camera Functions (4th Camera) Depth camera -
FRONT CAMERA
Number of Front Cameras 1 1
Sensor Resolution (Front) 32 Megapixel 12 Megapixel Samsung Galaxy A51 has better front camera resolution than Microsoft Surface Duo 2.
Lens Aperture (Front) F/2.2 F/2.0 Microsoft Surface Duo 2 has better front lens aperture than Samsung Galaxy A51.
Pixel Size (Front) - 1 μm
Focus Adjustment Focus free -
BATTERY AND CHARGING Samsung Galaxy A51 Microsoft Surface Duo 2
Battery Capacity (Battery Size) 4000 mAh 4449 mAh Microsoft Surface Duo 2 has larger battery capacity than Samsung Galaxy A51.
Talk Time 1920 minutes 1680 minutes Samsung Galaxy A51 has longer battery life when making calls than Microsoft Surface Duo 2.
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
Talk: up to 1680 min
Playback (local video): up to 15.5 hrs
Battery Technology Lithium Ion -
CELLULAR Samsung Galaxy A51 Microsoft Surface Duo 2
Technology WCDMA (UMTS) / GSM WCDMA (UMTS) / GSM
Mobile Broadband Generation 4G 5G Microsoft Surface Duo 2 has more advanced generation mobile network.
Operating System Android 10 Android 11
User Interface One UI -
Intelligent Assistant Bixby Google Assistant
Navigation GPS, GLONASS, BeiDou, Galileo GPS, GLONASS, BeiDou, Galileo, QZSS
COMMUNICATIONS Samsung Galaxy A51 Microsoft Surface Duo 2
Data Transmission GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE GPRS, FDD-LTE, TDD-LTE, Gigabit LTE, LAA, 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 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 14, Band 19, Band 20, Band 25, Band 26, Band 28, Band 29, Band 30, Band 38, Band 39, Band 40, Band 41, Band 42, Band 46, Band 48, Band 66, Band 71
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 700 PS, FDD 800 upper, FDD 800 DD, FDD 1900+, FDD 850+, FDD 700 APT, FDD 700d, FDD 2300 WCS, TDD 2600, TDD 1900, TDD 2300, TDD 2500, TDD 3500, TDD 5150, TDD 3600, FDD 1700 - 2110 AWS-3, FDD 600
5G NR Band - N1, n2, n3, n5, n7, n20, n28, n38, n41, n66, n71, n77, n78, n79, n25
5G NR Frequency - FDD 2100, FDD 1900PCS, FDD 1800, FDD 850, FDD 2600, FDD 800, FDD 700APT, TDD TD 2600, TDD TD 2500, FDD AWS-3, FDD 600, TDD TD 3700, TDD TD 3500, TDD TD 4500, FDD 1900
Wireless Interface IEEE 802.11a/b/g/n/ac, ANT+ IEEE 802.11ax
Bluetooth Bluetooth 5.0 LE Bluetooth 5.1
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 -
MEDIA Samsung Galaxy A51 Microsoft Surface Duo 2
Supported Digital Audio Standards WAV, WMA, AAC, AMR, MP3, FLAC, XMF, OGG, MIDI, M4A, MXMF, OGA, 3GA, AWB, IMY, RTTTL, RTX, OTA, MID WAV, AAC, AMR, MP3, FLAC, OGG, MIDI, M4A, apt-X, IMY, RTX, OTA, MID, TWS, RTTL
Supported Digital Video Standards MKV, FLV, AVI, WMV, ASF, 3GP, M4V, WebM, 3G2, MP4 MKV, FLV, AVI, MOV, MPEG-4, WMV, ASF, 3GP, H.264, TS, M2TS, WebM, HEVC, 3G2, HEIF, H.265 HEVC, HEIC
Sound Enhancements - Qualcomm aptX HD audio, Qualcomm aptX Classic
FEATURES Samsung Galaxy A51 Microsoft Surface Duo 2
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 Hall sensor, Time of Flight (ToF), dual accelerometers, dual gyroscope, dual magnetometer, dual ambient light sensor, dual proximity sensor
Security Devices Fingerprint reader (under display) Fingerprint reader (side)
Additional Phone Features Fast Charging, Samsung KNOX, Bixby Vision, Game Booster, Bixby Routines MIMO technology, Fast Charging, dual battery, Full Duplex communication, dual microphones with AI-based noise suppression and acoustic echo cancellation
OTHERS Samsung Galaxy A51 Microsoft Surface Duo 2
Included Accessories Power adapter SIM card removal tool, USB-C headset, Surface Duo 2 USB-C cable
Compliant Standards - HEARING AID M4/T3
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