Samsung Galaxy A51 vs. Microsoft Surface Duo

Phone Comparison, Reviews and Tests

In depth comparison and review of Samsung Galaxy A51 and Microsoft Surface Duo. 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 Comparison Chart
DESIGN AND DIMENSIONS Samsung Galaxy A51 Microsoft Surface Duo
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.
Width 73.6 mm 93.3 mm Microsoft Surface Duo has greater width than Samsung Galaxy A51.
Depth 7.9 mm 9.9 mm Samsung Galaxy A51 is narrower than Samsung Galaxy A51.
Weight 172 g 250 g Samsung Galaxy A51 is lighter than Samsung Galaxy A51.
Dimensions Details - Unfolded - 186.9 mm x 4.8 mm x 145.2 mm
Body Colour Silver | Prism crush black | Haze crush silver | Prism crush blue | Prism crush white Glacier
Waterproof (Water-resistant) - -
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
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" 5.6" Samsung Galaxy A51 has larger screen size than Microsoft Surface Duo.
Screen Resolution (Display Resolution) 2400 x 1080 pixels 1800 x 1350 pixels Samsung Galaxy A51 has better screen resolution than Microsoft Surface Duo.
Display Format Full HD+ -
Pixel Density 408 ppi 401 ppi Samsung Galaxy A51 has better pixel density than Microsoft Surface Duo.
Aspect Ratio - 4:3
Colour Depth 16.7 million colours -
Display Features Edge-to-Edge screen, Infinity O display PixelSense Fusion Displays
Display Protection (Screen Protector) - Corning Gorilla Glass (scratch resistant glass)
SECOND DISPLAY
Second Display Type - OLED display - colour
Second Display Screen Size - 5.6"
Second Display Resolution - 1800 x 1350 pixels
UNFOLDED DISPLAY
Unfolded Display Screen Size - 8.1 in
Unfolded Display Resolution - 2700 x 1800 pixels
PROCESSOR Samsung Galaxy A51 Microsoft Surface Duo
Processor Type (CPU) Samsung Exynos 9611 Qualcomm Snapdragon 855
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
RAM 4 GB 6 GB Microsoft Surface Duo 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 -
Memory Interface - UFS 3.0
Supported Flash Memory Cards (Expandable Memory) microSDHC, microSDXC - up to 512 GB -
CAMERA Samsung Galaxy A51 Microsoft Surface Duo
MAIN CAMERA
Number of Main Cameras 4 0
Sensor Resolution 48 Megapixel -
Lens Aperture F/2.0 -
Focus Adjustment Automatic -
Digital Zoom 8x -
Camera Modes Slow motion mode, Live Focus mode -
Light Source LED flash -
Video Resolutions Slo-mo video 1280 x 720 (720p) at 240 fps, 3840 x 2160 (4K) at 30 fps -
Camera Features (Functions) AR sticker, background blur, Scene Optimiser, Eye blink, Flaw detection, Stamp, Facial blur -
SECOND CAMERA
Sensor Resolution (2nd Camera) 12 Megapixel -
Lens Type (2nd Camera) Ultra wide-angle lens -
Lens Aperture (2nd Camera) F/2.2 -
Field of View (2nd Camera) 123 degree(s) -
THIRD CAMERA
Sensor Resolution (3rd Camera) 5 Megapixel -
Lens Aperture (3rd Camera) F/2.4 -
Camera Functions (3rd Camera) Macro camera -
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 11 Megapixel Samsung Galaxy A51 has better front camera resolution than Microsoft Surface Duo.
Lens Aperture (Front) F/2.2 F/2.0 Microsoft Surface Duo has better front lens aperture than Samsung Galaxy A51.
Field of View (Front) - 84 degree(s)
Pixel Size (Front) - 1 μm
Focus Adjustment Focus free -
Special Effects (Front) - HDR
Camera Modes (Front) - Burst mode, Panorama, low-light shots, Portrait mode with adjustable depth control
Light Source (Front) - High CRI LED flash
Video Resolutions (Front) - 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 (Front) - Phase Detect Auto-Focus (PDAF), FOV optimised with AI (for front and rear), dynamic range scene detection, Super-resolution zoom, super zoom up to 7x, gyro-based digital video stabilisation
BATTERY AND CHARGING Samsung Galaxy A51 Microsoft Surface Duo
Battery Capacity (Battery Size) 4000 mAh 3577 mAh Samsung Galaxy A51 has larger battery capacity than Microsoft Surface Duo.
Standby Time - 240 hours
Talk Time 1920 minutes 1620 minutes Samsung Galaxy A51 has longer battery life when making calls than Microsoft Surface Duo.
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
Standby: up to 240 hrs
Talk: up to 1620 min
Playback (local video): up to 15.5 hrs
Battery Technology Lithium Ion -
CELLULAR Samsung Galaxy A51 Microsoft Surface Duo
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 -
Intelligent Assistant Bixby Google Assistant
Navigation GPS, GLONASS, BeiDou, Galileo GPS, GLONASS, BeiDou, Galileo, QZSS
COMMUNICATIONS Samsung Galaxy A51 Microsoft Surface Duo
Data Transmission GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE GPRS, FDD-LTE, TDD-LTE, LAA
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 46, 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 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 5150, FDD 1700 - 2110 AWS-3
Wireless Interface IEEE 802.11a/b/g/n/ac, ANT+ IEEE 802.11ac
Bluetooth Bluetooth 5.0 LE Bluetooth 5.0
Bluetooth Profiles HFP, HSP, OPP, PAN, A2DP, AVRCP, HID, SAP, PBAP, MAP, HOGP -
NFC Yes - Samsung Galaxy A51 has NFC reader for mobile payments.
Messaging Services SMS, MMS -
MEDIA Samsung Galaxy A51 Microsoft Surface Duo
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, RTTTL, RTX, OTA, MID
Supported Digital Video Standards MKV, FLV, AVI, WMV, ASF, 3GP, M4V, WebM, 3G2, MP4 MKV, FLV, AVI, MOV, WMV, 3GP, TS, WebM, H.265 HEVC, MP4
Sound Enhancements - Qualcomm aptX audio
FEATURES Samsung Galaxy A51 Microsoft Surface Duo
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 Proximity sensor, hall sensor, dual accelerometers, dual gyroscope, dual magnetometer, dual ambient light 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 microphones with noise suppression and echo cancellation, Full Duplex communication, 360° hinge, stylus support, two apps side-by-side
OTHERS Samsung Galaxy A51 Microsoft Surface Duo
Included Accessories Power adapter SIM card removal tool, USB-C headphones, 18W charger, Surface Duo Bumper (Glacier)
Other projects: