Samsung Galaxy A3 (2016) vs Samsung Galaxy A51

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Display

Size

4.7 inches
6.5 inches

Resolution

1280 x 720 pixels,
312 PPI
2400 x 1080 pixels, 20:9 ratio,
405 PPI

Technology

Super AMOLED
Super AMOLED

Screen-to-body

69.30 %
87.37 %

Features

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 & Performance

System chip

Samsung Exynos 7 Quad 7578
Samsung Exynos 9611

Processor

Quad-core, 1500 MHz, ARM Cortex-A53, 64-bit
Octa-core, 2300 MHz, ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm

GPU

Mali-T720 MP2
Mali-G72 MP3

RAM

1.5GB
4GB

Internal storage

16GB
128GB

Storage expansion

microSDXC up to 128 GB
microSDXC up to 512 GB

OS

Android (7.0 Nougat, 5.1 Lollipop)
Android (10), Samsung One UI

Battery

Capacity

2300 mAh
4000 mAh

Type

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

Charging

 
Fast charging

Camera

Rear

Single camera
Quad camera

Main camera

13 MP (Autofocus)
48 MP (PDAF)

Specifications

Aperture size: F1.9
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

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

Features

Video calling, Video sharing
Hyperlapse, EIS

Front

5 MP
32 MP (HDR)

Design

Dimensions

5.30 x 2.57 x 0.29 inches (134.5 x 65.2 x 7.3 mm)
6.24 x 2.90 x 0.31 inches (158.5 x 73.6 x 7.9 mm)

Weight

4.66 oz (132 g)
the average is 6.4 oz (183 g)
6.07 oz (172 g)
the average is 6.4 oz (183 g)

Materials

Back: Glass; Frame: Metal
Back: Plastic; Frame: Plastic

Biometrics

 
2D Face unlock, In-screen fingerprint

Features

Touch sensitive control keys
 

Colors

Black, Gold, Pink, White
Prism Crush black, Prism Crush white, Prism Crush pink, Prism Crush blue

Cellular

LTE (FDD)

Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 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), 17(700 b), 20(800 DD), 26(850+), 28(700 APT), 66(AWS-3)

LTE (TDD)

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

UMTS

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

Data Speed

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

Dual SIM

 
Yes

SIM type

Nano SIM
Nano SIM

Multimedia

Headphones

3.5mm jack
3.5mm jack

Features

Album art cover, Background playback
Dolby Atmos

Connectivity & Features

Bluetooth

4.1
5.0

Wi-Fi

802.11 b, g, n; Wi-Fi Direct
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

Mass storage device, Charging
Charging, OTG

Sensors

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

Other

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

Phone features

Notifications

Haptic feedback, Music ringtones (MP3), Polyphonic ringtones, Vibration, Flight mode, Silent mode, Speakerphone
 

Other features

Voice dialing, Voice commands, Voice recording
 
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