Samsung Galaxy S6 edge vs Samsung Galaxy A51 vs Samsung Galaxy A21 - specs comparison

Display

Size:

5.1 inches

6.5 inches

Resolution:

2560 x 1440 pixels, 577 PPI

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

1600 x 720 pixels, 20:9 ratio, 270 PPI

Technology:

Super AMOLED

IPS LCD

Screen-to-body:

71.75 %

87.37 %

79.20 %

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

60Hz refresh rate, Ambient light sensor, Proximity sensor

Hardware

System chip:

Samsung Exynos 7 Octa 7420

Samsung Exynos 9611

Mediatek Helio P35

Processor:

Octa-core, 2100 MHz, ARM Cortex-A57 and ARM Cortex-A53, 64-bit, 14 nm

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

Octa-core, 2300 MHz, Arm Cortex-A53, 64-bit, 12 nm

GPU:

Mali-T760 MP8

Mali-G72 MP3

PowerVR GE8320

RAM:

3GB LPDDR4

4GB LPDDR4

3GB LPDDR4

Internal storage:

128GB, not expandable

128GB, available to use: 105.9 GB

32GB (eMMC 5.1), available to use: 19.8 GB

Storage expansion:

microSDXC up to 512 GB

Device type:

Smartphone

OS:

Android (7.0 Nougat, 6.0 Marshmallow, 5.1 Lollipop, 5.0 Lollipop), Samsung TouchWiz UI

Android (11, 10), Samsung One UI

Android (10), Samsung One UI

Battery

Capacity:

2600 mAh

4000 mAh

Type:

Not user replaceable

Li - Polymer, Not user replaceable

Battery life test results:

link

Charging:

Qualcomm Quick Charge 2.0, Qi and Powermat wireless charging

Fast charging

Max charge speed:

Wired: 15.0W

Camera

Rear:

Single camera

Quad camera

Main camera:

16 MP (OIS, Autofocus, BSI sensor)

48 MP (PDAF)

16 MP (PDAF)

Specifications:

F1.9; 28 mm; 1/2.6"; 1.12 μm

F2.0; 26 mm; 1/2"; 0.8 μm

F1.8; 1/3.06"; 1 μm

Second camera:

12 MP (Ultra-wide)

8 MP (Ultra-wide)

Specifications:

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

Aperture size: F2.2; Sensor size: 1/4"; Pixel size: 1.12 μm

Third camera:

5 MP (Macro)

2 MP (Macro)

Specifications:

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

Aperture size: F2.4

Fourth camera:

5 MP (Depth information)

2 MP (Depth information)

Specifications:

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

Aperture size: F2.4

Video recording:

3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (60 fps), 1280x720 (HD) (120 fps)

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

1920x1080 (Full HD) (30 fps)

Features:

OIS, HDR, Continuous autofocus, Picture-taking during video recording, Video light, Video calling

Hyperlapse, EIS

Front:

5 MP (HDR)

32 MP (HDR)

13 MP

Video capture:

2560x1440 (QHD) (30 fps)

1920x1080 (Full HD)

Design

Dimensions:

5.59 x 2.76 x 0.28 inches (142.1 x 70.1 x 7 mm)

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

6.61 x 3.02 x 0.32 inches (167.8 x 76.7 x 8.1 mm)

Weight:

4.66 oz (132.0 g)

6.07 oz (172.0 g)

6.81 oz (193.0 g)

Materials:

Back: Glass; Frame: Aluminum

Back: Plastic; Frame: Plastic

Biometrics:

Fingerprint (touch)

2D Face unlock, In-screen fingerprint

Fingerprint (touch)

Features:

Notification light, Touch sensitive control keys

Keys:

Right: Volume control, Lock/Unlock key

Colors:

Black, Gold, Green, White

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

Black

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)

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)

Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 17(700 b), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 66(AWS-3), 71(600)

LTE (TDD):

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

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

UMTS:

Bands 5(850), 2(1900), 1(2100)

Bands 5(850), 8(900), 4(1700/2100), 2(1900), 1(2100)

Data Speed:

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

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

LTE-A Cat 6 (300/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s

SIM type:

Nano SIM

HD Voice:

Yes

VoLTE:

Yes

Multimedia

Headphones:

3.5mm jack

Speakers:

Earpiece, Loudspeaker

Features:

Album art cover, Background playback, Preset equalizer

Dolby Atmos

Screen mirroring:

DLNA, Wireless screen share

Wireless screen share

Radio:

FM

Additional microphone(s):

for Noise cancellation, Video recording

for Noise cancellation

Connectivity & Features

Bluetooth:

4.1

5.0

Wi-Fi:

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

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

USB:

microUSB, USB 2.0

Type-C (reversible), USB 2.0

Features:

Charging, Mass storage device

Charging, OTG

Charging

Location:

GPS, A-GPS, Glonass

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

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

Sensors:

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

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

Accelerometer, Gyroscope, Compass

Other:

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

NFC, ANT+

NFC

Hearing aid compatible:

M4, T3

Regulatory Approval

FCC approval:

Date approved:

Mar 02, 2015

Nov 28, 2019

Apr 17, 2020

FCC ID value:

A3LSMG925A link

A3LSMA515FN link

ZCASMA215U link

Measured SAR:

Head:

0.24 W/kg

0.89 W/kg

0.42 W/kg

Body:

0.69 W/kg

1.18 W/kg

1.27 W/kg

Simultaneous Transmission:

1.25 W/kg

1.56 W/kg

1.27 W/kg

Wireless Router:

1.07 W/kg

1.12 W/kg

1.27 W/kg

Phablet:

2.76 W/kg

Buyers information

Price:

$ 400

$ 250

User Manual:

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

In The Box:

This is the official Samsung Galaxy A21 User Guide in English provided from the manufacturer.

Availability

Officially announced:

Mar 01, 2015

Dec 12, 2019

Apr 08, 2020