Samsung Galaxy J7 (2017) vs Samsung Galaxy A40

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Display

Size

5.5 inches
5.9 inches

Resolution

1920 x 1080 pixels,
401 PPI
2340 x 1080 pixels, 19.5:9 ratio,
437 PPI

Technology

Super AMOLED
Super AMOLED

Screen-to-body

73.28 %
85.73 %

Features

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

Hardware & Performance

System chip

Samsung Exynos 7 Octa 7870
Exynos 7904

Processor

Octa-core, 1600 MHz, ARM Cortex-A53, 64-bit, 14 nm
Octa-core, 1800 MHz, ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 14 nm

GPU

Mali-T830 MP2
Mali-G71 MP2

RAM

3GB LPDDR3
4GB LPDDR4

Internal storage

16GB
64GB

Storage expansion

microSDXC up to 256 GB
microSDXC up to 512 GB

OS

Android (9.0 Pie, 7.0 Nougat), Samsung One UI
Android (10, 9.0 Pie), Samsung One UI

Battery

Capacity

3600 mAh
3100 mAh

Type

Not user replaceable
Li - Polymer, Not user replaceable

Charging

 
Samsung Adaptive Fast Charging

Camera

Rear

Single camera
Dual camera

Main camera

13 MP (Autofocus)
16 MP (PDAF)

Specifications

Aperture size: F1.7
Aperture size: F1.7; Focal length: 27 mm; Sensor size: 1/2.8"; Pixel size: 1.12 μm

Second camera

 
5 MP (Ultra-wide)

Specifications

 
Aperture size: F2.2; Focal Length: 13 mm; Sensor size: 1/5"; Pixel size: 1.12 μm

Video recording

1920x1080 (Full HD) (30 fps)
1920x1080 (Full HD) (30 fps)

Features

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

Front

13 MP (Flash)
25 MP

Design

Dimensions

6.00 x 2.94 x 0.31 inches (152.5 x 74.8 x 8 mm)
5.69 x 2.72 x 0.31 inches (144.4 x 69.2 x 7.9 mm)

Weight

6.38 oz (181 g)
the average is 6.4 oz (184 g)
4.94 oz (140 g)
the average is 6.4 oz (184 g)

Materials

Back: Aluminum
Back: Plastic; Frame: Plastic

Biometrics

Fingerprint (touch)
2D Face unlock, Fingerprint (touch)

Features

Touch sensitive control keys
 

Colors

Black, Gold, Silver, Rose gold
Black, Coral, Blue, White

Cellular

LTE (FDD)

Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD)
Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD)

LTE (TDD)

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

UMTS

850, 900, 1900, 2100 MHz
850, 900, 1900, 2100 MHz

Data Speed

LTE-A Cat 6 (300/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
LTE-A Cat 12/13 (600/150 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s

Dual SIM

 
Yes

SIM type

Nano SIM
Nano SIM

VoLTE

Yes
 

Multimedia

Headphones

3.5mm jack
3.5mm jack

Features

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

Connectivity & Features

Bluetooth

4.1
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; Wi-Fi Direct, Hotspot

USB

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

Features

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

Sensors

Accelerometer, Gyroscope, 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+, VoIP, Tethering, Computer sync, OTA sync
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