Samsung Galaxy A7 (2017) vs Samsung Galaxy S7 vs Samsung Galaxy A51 - specs comparison

Display

Size:

5.7 inches

5.1 inches

6.5 inches

Resolution:

1920 x 1080 pixels, 386 PPI

2560 x 1440 pixels, 576 PPI

2400 x 1080 pixels, 20:9 ratio, 405 PPI

Technology:

Super AMOLED

Screen-to-body:

73.78 %

72.30 %

87.37 %

Features:

Scratch-resistant glass (Corning Gorilla Glass 4), Ambient light sensor, Proximity sensor

60Hz refresh rate, Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor

Hardware

System chip:

Samsung Exynos 7 Octa 7880

Qualcomm Snapdragon 820 MSM8996

Samsung Exynos 9611

Processor:

Octa-core, 1900 MHz, ARM Cortex-A53, 64-bit, 14 nm

Quad-core, 2200 MHz, Kryo, 64-bit, 14 nm

Octa-core, 2300 MHz, ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm

GPU:

Mali-T830 MP3

Adreno 530

Mali-G72 MP3

RAM:

3GB LPDDR3

4GB LPDDR4

Internal storage:

32GB, available to use: 23 GB

32GB, available to use: 24.5 GB

128GB, available to use: 105.9 GB

Storage expansion:

microSDXC up to 256 GB

microSDXC up to 200 GB

microSDXC up to 512 GB

Device type:

Smartphone

OS:

Android (8.0 Oreo, 7.0 Nougat, 6.0 Marshmallow)

Android (8.0 Oreo, 7.0 Nougat, 6.0 Marshmallow), Samsung TouchWiz UI

Android (10), Samsung One UI

Battery

Capacity:

3600 mAh

3000 mAh

4000 mAh

Type:

Li - Ion, Not user replaceable

Li - Polymer, Not user replaceable

Battery life test results:

link

Charging:

Fast charging

Qualcomm Quick Charge 2.0, Qi and Powermat wireless charging

Fast charging

Camera

Rear:

Single camera

Quad camera

Main camera:

16 MP (Autofocus, CMOS image sensor)

12 MP (OIS, PDAF)

48 MP (PDAF)

Specifications:

F1.9

F1.7; 26 mm; 1/2.5"; 1.4 μm

F2.0; 26 mm; 1/2"; 0.8 μm

Second camera:

12 MP (Ultra-wide)

Specifications:

Aperture size: F2.2; Focal Length: 13 mm; Pixel size: 1.12 μm

Third camera:

5 MP (Macro)

Specifications:

Aperture size: F2.4; Focal Length: 40 mm

Fourth camera:

5 MP (Depth information)

Specifications:

Aperture size: F2.2; Sensor size: 1/5"; Pixel size: 1.12 μm

Video recording:

1920x1080 (Full HD) (30 fps)

3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (60 fps), 1280x720 (HD) (240 fps)

3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (240 fps)

Features:

Video calling, Video sharing

HDR, Picture-taking during video recording, Video calling, Video sharing

Hyperlapse, EIS

Front:

16 MP

5 MP (HDR)

32 MP (HDR)

Video capture:

1920x1080 (Full HD)

Design

Dimensions:

6.17 x 3.06 x 0.31 inches (156.8 x 77.6 x 7.9 mm)

5.61 x 2.74 x 0.31 inches (142.4 x 69.6 x 7.9 mm)

6.24 x 2.90 x 0.31 inches (158.5 x 73.6 x 7.9 mm)

Weight:

6.56 oz (186.0 g)

5.36 oz (152.0 g)

6.07 oz (172.0 g)

Materials:

Back: Glass (Corning Gorilla Glass 4); Frame: Aluminum

Back: Plastic; Frame: Plastic

Resistance:

Water, Dust; IP68

Biometrics:

Fingerprint (touch)

2D Face unlock, In-screen fingerprint

Features:

Touch sensitive control keys

Keys:

Left: Volume control; Right: Lock/Unlock key

Right: Volume control, Lock/Unlock key

Colors:

Black sky, Gold sand, Blue mist, Peach cloud

Black, Gold, Silver, Pink, White, Pink gold

Prism Crush black, Prism Crush white, Prism Crush pink, Prism Crush blue

Cellular

LTE (FDD):

Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 17(700 b), 20(800 DD), 28(700 APT)

Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 18(800 Lower), 19(800 Upper), 20(800 DD), 29(700 d), 30(2300 WCS)

Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 14(700 PS), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 29(700 d), 30(2300 WCS), 66(AWS-3), 71(600)

LTE (TDD):

Bands 38(2600), 40(2300), 41(2600+)

Bands 38(2600), 39(1900+), 40(2300), 41(2600+)

Bands 38(2600), 39(1900+), 41(2600+)

UMTS:

850, 900, 1700/2100, 1900, 2100 MHz

850, 1700/2100, 1900, 2100 MHz

850, 900, 1700/2100, 1900, 2100 MHz

Data Speed:

LTE-A Cat 6 (300/50 Mbit/s), HSPA

LTE-A Cat 9 (450/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, UMTS

LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s

Dual SIM:

Yes

SIM type:

Nano SIM

HD Voice:

Yes

VoLTE:

Yes

Multimedia

Headphones:

3.5mm jack

Speakers:

Earpiece, Loudspeaker

Features:

Album art cover, Background playback

aptX-HD

Dolby Atmos

Screen mirroring:

Wireless screen share

DLNA, Wireless screen share

Wireless screen share

Radio:

FM

Additional microphone(s):

for Noise cancellation

Connectivity & Features

Bluetooth:

4.2

5.0

Wi-Fi:

802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot

802.11 a, b, g, n, ac, dual-band; MIMO, Wi-Fi Direct, Hotspot

802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot

USB:

Type-C (reversible), USB 2.0

microUSB, USB 2.0

Type-C (reversible), USB 2.0

Features:

Charging, Mass storage device

Charging, OTG, Mass storage device

Charging, OTG

Location:

GPS, A-GPS, Glonass, BeiDou

GPS, A-GPS, Glonass

GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning

Sensors:

Accelerometer, Gyroscope, Compass, Hall (for flip covers), Barometer

Accelerometer, Gyroscope, Compass, Hall (for flip covers)

Other:

NFC, ANT+, Tethering, Computer sync, OTA sync

NFC, ANT+, UMA (Wi-Fi Calling), Tethering, Computer sync, OTA sync

NFC, ANT+

Hearing aid compatible:

M4, T3

Regulatory Approval

FCC approval:

Date approved:

Dec 01, 2016

Feb 12, 2016

Nov 28, 2019

FCC ID value:

A3LSMA720F link

A3LSMG930F link

A3LSMA515FN link

Measured SAR:

Head:

0.24 W/kg

0.43 W/kg

0.89 W/kg

Body:

0.71 W/kg

1.06 W/kg

1.18 W/kg

Simultaneous Transmission:

3.78 W/kg

1.59 W/kg

1.56 W/kg

Wireless Router:

1.08 W/kg

1.03 W/kg

1.12 W/kg

Phablet:

2.76 W/kg

Buyers information

Price:

$ 699

$ 400

User Manual:

This is the official Samsung Galaxy A51 User Guide in English provided from the manufacturer.

Availability

Officially announced:

Jan 02, 2017

Feb 21, 2016

Dec 12, 2019