Samsung Galaxy S9+ vs Samsung Galaxy A51

Compare phone and tablet specifications of up to three devices at once.

Display

Size:

6.2 inches
6.5 inches

Resolution:

2960 x 1440 pixels, 18.5:9 ratio, 531 PPI
2400 x 1080 pixels, 20:9 ratio, 405 PPI

Technology:

Super AMOLED
Super AMOLED

Screen-to-body:

83.68 %
87.37 %

Features:

HDR support, Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor
60Hz refresh rate, Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor

Hardware

System chip:

Qualcomm Snapdragon 845 SDM845
Samsung Exynos 9611

Processor:

Octa-core, 2800 MHz, Kryo 385, 64-bit, 10 nm
Octa-core, 2300 MHz, ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm

GPU:

Adreno 630
Mali-G72 MP3

RAM:

6GB LPDDR4
4GB LPDDR4

Internal storage:

64GB
128GB, available to use: 105.9 GB

Storage expansion:

microSDXC up to 400 GB
microSDXC up to 512 GB

Device type:

Smartphone
Smartphone

OS:

Android (10, 9.0 Pie, 8.0 Oreo), Samsung One UI
Android (11, 10), Samsung One UI

Battery

Capacity:

3500 mAh
4000 mAh

Type:

Li - Ion, Not user replaceable
Li - Polymer, Not user replaceable

Battery life test results:

Charging:

Qualcomm Quick Charge 2.0, Samsung Adaptive Fast Charging, Qi and Powermat wireless charging
Fast charging

Camera

Rear:

Dual camera
Quad camera

Main camera:

12 MP (OIS, PDAF)
48 MP (PDAF)

Specifications:

Aperture size: F1.5/F2.4; Focal length: 26 mm; Sensor size: 1/2.55"; Pixel size: 1.4 μm
Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm

Second camera:

12 MP (Telephoto, OIS, Autofocus)
12 MP (Ultra-wide)

Specifications:

Optical zoom: 2.0x; Aperture size: F2.4; Focal Length: 52 mm; Sensor size: 1/3.6"; Pixel size: 1 μm
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:

3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (960 fps)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (240 fps)

Features:

HDR, Time-lapse video, Hyperlapse, Continuous autofocus, Object tracking, Picture-taking during video recording, EIS, Video calling, Video sharing
Hyperlapse, EIS

Front:

8 MP (Autofocus, HDR)
32 MP (HDR)

Video capture:

2560x1440 (QHD) (30 fps)
1920x1080 (Full HD)

Design

Dimensions:

6.22 x 2.91 x 0.33 inches (158.1 x 73.8 x 8.5 mm)
6.24 x 2.90 x 0.31 inches (158.5 x 73.6 x 7.9 mm)

Weight:

6.67 oz (189.0 g)
6.07 oz (172.0 g)

Materials:

Back: Glass (Corning Gorilla Glass 5); Frame: Aluminum
Back: Plastic; Frame: Plastic

Resistance:

Water, Dust; IP68

Biometrics:

Iris scanner, 2D Face unlock, Fingerprint (touch)
2D Face unlock, In-screen fingerprint

Features:

Notification light

Keys:

Left: Volume control, Other; Right: Lock/Unlock key
Right: Volume control, Lock/Unlock key

Colors:

Midnight black, Coral blue, Titanium gray, Lilac purple, Burgundy red, Sunrise gold, Ice blue, Polaris blue
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), 12(700 a), 13(700 c), 14(700 PS), 17(700 b), 18(800 Lower), 19(800 Upper), 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), 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), 39(1900+), 40(2300), 41(2600+), 46
Bands 38(2600), 39(1900+), 41(2600+)

UMTS:

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

Data Speed:

LTE-A Pro Cat 18 (1200/150 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s

SIM type:

Nano SIM
Nano SIM

Multimedia

Headphones:

3.5mm jack
3.5mm jack

Speakers:

Earpiece, Multiple speakers
Earpiece, Loudspeaker

Features:

32-Bit DAC, Dolby Atmos, aptX-HD
Dolby Atmos

Screen mirroring:

Wireless screen share
Wireless screen share

Radio:

FM
FM

Additional microphone(s):

for Noise cancellation
for Noise cancellation

Connectivity & Features

Bluetooth:

5.0
5.0

Wi-Fi:

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 3.1
Type-C (reversible), USB 2.0

Features:

Charging, OTG, Video out
Charging, OTG

Location:

GPS, A-GPS, Glonass, Galileo, BeiDou
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+
NFC, ANT+

Regulatory Approval

FCC approval:

Date approved:

Jan 11, 2018
Nov 28, 2019

FCC ID value:

A3LSMG965U
A3LSMA515FN

Measured SAR:

Head:

0.36 W/kg
0.89 W/kg

Body:

0.79 W/kg
1.18 W/kg

Simultaneous Transmission:

1.59 W/kg
1.56 W/kg

Wireless Router:

1.04 W/kg
1.12 W/kg

Phablet:

3.94 W/kg
2.76 W/kg

Buyers information

Price:

$ 840
$ 400

User Manual:

This is the official Samsu​ng Galaxy A51 User Guide in English provided from the manufacturer.

Availability

Officially announced:

Feb 25, 2018
Dec 12, 2019
FCC OKs Cingular\'s purchase of AT&T Wireless