Samsung Galaxy J7 Duo vs. Samsung Galaxy A51

Phone Comparison, Reviews and Tests

Side by side comparison and review of Samsung Galaxy J7 Duo and Samsung Galaxy A51. 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 J7 Duo vs. Samsung Galaxy A51 Comparison Chart
DESIGN AND DIMENSIONS Samsung Galaxy J7 Duo Samsung Galaxy A51
Product Type Smartphone Smartphone
Manufacturer Model Number SM-J720F SM-A515F/DSN
Form Factor Touch Touch
Height 153.5 mm 158.5 mm Samsung Galaxy A51 has greater height than Samsung Galaxy J7 Duo.
Width 77.2 mm 73.6 mm Samsung Galaxy J7 Duo has greater width than Samsung Galaxy A51.
Depth 8.2 mm 7.9 mm Samsung Galaxy A51 is narrower than Samsung Galaxy J7 Duo.
Weight 174 g 172 g Samsung Galaxy A51 is lighter than Samsung Galaxy J7 Duo.
Body Colour Black Silver | Prism crush black | Haze crush silver | Prism crush blue | Prism crush white
Waterproof (Water-resistant) - -
SAR Value 1.397 W/kg (body), 0.543 W/kg (head) 0.369 W/kg (head), 1.59 W/kg (body), 2.93 W/kg (limb)
Connector Type Micro-USB - 5 pin Micro-USB Type B
Headset jack - mini-phone 3.5mm
USB Type-C - 24 pin USB-C
Headset jack - mini-phone 3.5mm
SIM Card Type (Size) Micro SIM Nano SIM
SIM Card Qty Single-SIM Dual-SIM
DISPLAY Samsung Galaxy J7 Duo Samsung Galaxy A51
Display Type OLED display OLED display
Display Technology HD Super AMOLED Super AMOLED
Screen Size (Display Size) 5.5" 6.5" Samsung Galaxy A51 has larger screen size than Samsung Galaxy J7 Duo.
Screen Resolution (Display Resolution) 1280 x 720 pixels 2400 x 1080 pixels Samsung Galaxy A51 has better screen resolution than Samsung Galaxy J7 Duo.
Display Format 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
PROCESSOR Samsung Galaxy J7 Duo Samsung Galaxy A51
Processor Type (CPU) - Samsung Exynos 9611
Clock Speed 1.6 GHz 2.3 GHz Samsung Galaxy A51 has higher clock speed than Samsung Galaxy J7 Duo.
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 J7 Duo Samsung Galaxy A51
RAM 3 GB 4 GB Samsung Galaxy A51 has more RAM than Samsung Galaxy J7 Duo.
Internal Memory Size (Storage Capacity) 32 GB 128 GB Samsung Galaxy A51 has more internal memory than Samsung Galaxy J7 Duo.
User Memory 21.9 GB 107 GB
Supported Flash Memory Cards (Expandable Memory) microSDHC, microSDXC - up to 256 GB microSDHC, microSDXC - up to 512 GB
CAMERA Samsung Galaxy J7 Duo Samsung Galaxy A51
MAIN CAMERA
Number of Main Cameras 2 4
Sensor Resolution 13 Megapixel 48 Megapixel Samsung Galaxy A51 has better camera resolution than Samsung Galaxy J7 Duo.
Lens Aperture F/1.9 F/2.0 Samsung Galaxy J7 Duo has better lens aperture than Samsung Galaxy J7 Duo.
Focus Adjustment Automatic Automatic
Digital Zoom - 8x
Camera Modes - Slow motion mode, Live Focus mode
Light Source LED flash LED flash
Video Resolutions 1920 x 1080 (1080p) at 30 fps 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) 5 Megapixel 12 Megapixel Samsung Galaxy A51 has better second camera resolution than Samsung Galaxy J7 Duo.
Lens Type (2nd Camera) - Ultra wide-angle lens
Lens Aperture (2nd Camera) F/1.9 F/2.2 Samsung Galaxy J7 Duo has better second camera lens aperture than Samsung Galaxy J7 Duo.
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) 8 Megapixel 32 Megapixel Samsung Galaxy A51 has better front camera resolution than Samsung Galaxy J7 Duo.
Lens Aperture (Front) F/1.9 F/2.2 Samsung Galaxy J7 Duo has better front lens aperture than Samsung Galaxy J7 Duo.
Focus Adjustment - Focus free
BATTERY AND CHARGING Samsung Galaxy J7 Duo Samsung Galaxy A51
Battery Capacity (Battery Size) 3000 mAh 4000 mAh Samsung Galaxy A51 has larger battery capacity than Samsung Galaxy J7 Duo.
Talk Time 1200 minutes 1920 minutes Samsung Galaxy A51 has longer battery life when making calls than Samsung Galaxy J7 Duo.
Run Time Details Active online usage (WCDMA): up to 11 hrs
Active online usage (LTE): up to 13 hrs
Active online usage (Wi-Fi): up to 13 hrs
Playback (video): up to 17 hrs
Playback (audio): up to 66 hrs
Talk (WCDMA): up to 1200 min
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
Battery Technology - Lithium Ion
CELLULAR Samsung Galaxy J7 Duo Samsung Galaxy A51
Technology WCDMA (UMTS) / GSM WCDMA (UMTS) / GSM
Mobile Broadband Generation 4G 4G Both phones have the same mobile network generation.
Operating System Google Android Android 10
User Interface - One UI
Intelligent Assistant Bixby Bixby
Navigation GPS, GLONASS, BeiDou GPS, GLONASS, BeiDou, Galileo
COMMUNICATIONS Samsung Galaxy J7 Duo Samsung Galaxy A51
Data Transmission GPRS, EDGE, HSDPA, HSUPA, HSPA+, 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 5, Band 8 Band 1, Band 2, Band 4, Band 5, Band 8
3G UMTS Frequency 2100, 1900, 850, 900 2100, 1900, 1700, 850, 900
4G LTE Band Band 1, Band 3, Band 5, Band 7, Band 8, Band 20, Band 38, Band 40, Band 41 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
4G LTE Frequency FDD 2100, FDD 1800+, FDD 850, FDD 2600, FDD 900, FDD 800 DD, TDD 2600, TDD 2300, TDD 2500 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
Wireless Interface IEEE 802.11a/b/g/n/ac, ANT+/ANT IEEE 802.11a/b/g/n/ac, ANT+
Bluetooth Bluetooth 5.0 Bluetooth 5.0 LE
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 SMS, MMS
MEDIA Samsung Galaxy J7 Duo Samsung Galaxy A51
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, MPEG-4, WMV, ASF, 3GP, M4V, WebM, 3G2 MKV, FLV, AVI, WMV, ASF, 3GP, M4V, WebM, 3G2, MP4
FEATURES Samsung Galaxy J7 Duo Samsung Galaxy A51
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 Accelerometer, ambient light sensor, proximity sensor, gyro sensor, hall sensor, geomagnetic sensor
Security Devices Face recognition, fingerprint reader Fingerprint reader (under display)
Additional Phone Features - Fast Charging, Samsung KNOX, Bixby Vision, Game Booster, Bixby Routines
OTHERS Samsung Galaxy J7 Duo Samsung Galaxy A51
Included Accessories Power adapter Power adapter
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