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Alcatel Dawn vs Samsung Galaxy J7 (2017) AT&T vs Samsung Galaxy A51

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

Comparison mode:

Display

Size:

4.5 inches
5.5 inches
6.5 inches

Resolution:

854 x 480 pixels, 218 PPI
1280 x 720 pixels, 267 PPI
2400 x 1080 pixels, 20:9 ratio, 405 PPI

Technology:

TFT
TFT
Super AMOLED

Refresh rate:

60Hz

Screen-to-body:

64.97 %
72.05 %
87.37 %

Touchscreen:

Capacitive, Multi-touch

Features:

Ambient light sensor, Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 4), Ambient light sensor, Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor

Hardware

System chip:

Qualcomm Snapdragon 210 8909
Samsung Exynos 7 Octa 7870
Samsung Exynos 9611

Processor:

Quad-core, 1100 MHz, ARM Cortex-A7
Octa-core, 1600 MHz, ARM Cortex-A53, 64-bit, 14 nm
Octa-core, 2300 MHz, ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm

GPU:

Adreno 304
Mali-T830 MP1
Mali-G72 MP3

RAM:

1GB
2GB LPDDR3
4GB LPDDR4

Internal storage:

8GB
16GB
128GB, available to use: 105.9 GB

Storage expansion:

microSDXC up to 128 GB
microSDXC up to 256 GB
microSDXC up to 512 GB

Device type:

Smartphone
Smartphone
Smartphone

OS:

Android (6.0 Marshmallow)
Android (7.0 Nougat)
Android (11, 10), Samsung One UI

Battery

Capacity:

1780 mAh
3300 mAh
4000 mAh

Type:

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

Battery life test results:

Charging:

Fast charging

Camera

Rear:

Single camera
Single camera
Quad camera

Main camera:

5 MP
8 MP (Autofocus, CMOS image sensor)
48 MP (PDAF)

Specifications:

Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 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:

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

Features:

Video calling, Video sharing
Video calling, Video sharing
Hyperlapse, EIS

Front:

2 MP
5 MP
32 MP (HDR)

Video capture:

1920x1080 (Full HD)

Design

Dimensions:

5.20 x 2.56 x 0.39 inches (132.2 x 65.1 x 10.01 mm)
5.96 x 3.01 x 0.34 inches (151.5 x 76.4 x 8.6 mm)
6.24 x 2.90 x 0.31 inches (158.5 x 73.6 x 7.9 mm)

Weight:

4.80 oz (136.0 g)
5.6 oz (159.0 g)
6.07 oz (172.0 g)

Materials:

Back: Plastic; Frame: Plastic

Biometrics:

2D Face unlock, In-screen fingerprint

Features:

Touch sensitive control keys, Soft keys

Keys:

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

Colors:

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

Cellular

LTE (FDD):

Bands 25(1900+), 26(850+)
Bands 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 12(700 a)
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 41(2600+)
Bands 38(2600), 39(1900+), 41(2600+)

UMTS:

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

Data Speed:

LTE Cat 4 (150/50 Mbit/s), HSPA, UMTS
LTE-A Cat 6 (300/50 Mbit/s)
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s

SIM type:

Nano SIM
Nano SIM

HD Voice:

Yes

VoLTE:

Yes

Multimedia

Headphones:

3.5mm jack
3.5mm jack
3.5mm jack

Speakers:

Earpiece, Loudspeaker
Earpiece, Loudspeaker
Earpiece, Loudspeaker

Features:

Album art cover, Background playback
Album art cover, Background playback
Dolby Atmos

Screen mirroring:

Wireless screen share
Wireless screen share

Radio:

FM
FM
FM

Additional microphone(s):

for Noise cancellation

Connectivity & Features

Bluetooth:

4.1
4.1, EDR
5.0

Wi-Fi:

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

USB:

microUSB, USB 2.0
microUSB, USB 2.0
Type-C (reversible), USB 2.0

Features:

Mass storage device, Charging
Mass storage device, Charging
Charging, OTG

Location:

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

Sensors:

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

Other:

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

Hearing aid compatible:

M3, T4
M3, T3

Phone features

Notifications:

Haptic feedback

Other features:

Voice dialing, Voice commands, Voice recording

Regulatory Approval

FCC approval:

Date approved:

Mar 17, 2017
Nov 28, 2019

FCC ID value:

A3LSMJ727A
A3LSMA515FN

Measured SAR:

Head:

0.62 W/kg
0.89 W/kg

Body:

0.57 W/kg
1.18 W/kg

Simultaneous Transmission:

1.25 W/kg
1.56 W/kg

Wireless Router:

0.75 W/kg
1.12 W/kg

Phablet:

3.97 W/kg
2.76 W/kg

Buyers information

Price:

$ 240
$ 400

User Manual:

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

Availability

Officially announced:

Jul 09, 2016
Dec 12, 2019
FCC OKs Cingular\'s purchase of AT&T Wireless