Samsung Galaxy S8 vs Samsung Galaxy A40

$316.66 VIEW ON AMAZON
$238.15 VIEW ON AMAZON

Display

Display size

5.8 inches
5.9 inches

Resolution

1440 x 2960 pixels
1080 x 2340 pixels

Aspect Ratio

18.5:9
19.5:9

Pixel density

570 ppi
437 ppi

Technology

Super AMOLED
Super AMOLED

Screen-to-body

84.26 %
85.73 %

Features

HDR video support, Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor

Hardware & Performance

System chip

Qualcomm Snapdragon 835 MSM8998
Samsung Exynos 7 Octa 7885

Processor

Octa-core, 2350 MHz, Kryo 280, 64-bit, 10 nm
Octa-core, 1800 MHz, ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 14 nm

GPU

Adreno 540
Mali-G71 MP2

RAM

4 GB LPDDR4
4 GB LPDDR4

Internal storage

64 GB
64 GB

Available to use

 
49.4 GB

Storage expansion

microSDXC up to 256 GB
microSDXC up to 512 GB

Device type

Smart phone
Smart phone

OS

Android (9.0 Pie, 8.0 Oreo, 7.0 Nougat), Samsung One UI
Android (9.0 Pie), Samsung One UI

Battery

Capacity

3000 mAh
3100 mAh

Type

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

Charging

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

Talk time

30.00 hours
the average is 19 h (1141 min)
 

Stand-by time

13.4 days (321 hours)
the average is 21 days (505 h)
 

Talk time (3G)

 
18.00 hours
the average is 23 h (1387 min)

Internet use

3G: 12 hours; LTE: 14 hours; Wi-Fi: 14 hours
3G: 9 hours; LTE: 11 hours; Wi-Fi: 11 hours

Music playback

88.00 hours
62.00 hours

Video playback

17.00 hours
14.00 hours

Camera

Rear

Single camera
Dual camera

Main camera

12 megapixels
16 megapixels

Features

Optical image stabilization, Phase detection autofocus
Phase detection autofocus

Specifications

Aperture size: F1.7; Focal length: 26 mm; Sensor size: 1/2.55"; Pixel size: 1.4 μm
Aperture size: F1.7; Focal length: 27 mm; Sensor size: 1/2.8"; Pixel size: 1.12 μm

Second camera

 
5 megapixels

Features

 
Ultra-wide

Specifications

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

Flash

LED
LED

Software Features

Manual focus, Object tracking, RAW image capture, HDR, Panorama, Face detection, Smile detection, Voice activation, Burst mode, Effects, Frames, Exposure compensation, ISO control, White balance presets, Shutter speed control, Touch to focus, Self-timer, Digital zoom, Geo tagging
HDR, Panorama, Face detection, Scenes, Exposure compensation, ISO control, White balance presets, Touch to focus, Self-timer, Digital zoom, Geo tagging

Video recording

3840x2160 (4K UHD) (30 fps), 2560x1440 (QHD), 1920x1080 (Full HD) (60 fps), 1280x720 (HD) (240 fps)
1920x1080 (Full HD) (30 fps)

Features

High Dynamic Range mode (HDR), Time-lapse video, Hyperlapse, Continuous autofocus, Object tracking, Picture-taking during video recording, Video light, Digital image stabilization, Video calling, Video sharing
Hyperlapse, Video calling, Video sharing

Front

8 megapixels
25 megapixels

Features

Wide Angle, Autofocus, High Dynamic Range mode (HDR)
 

Video capture

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

Design

Form factor

Candybar
Candybar

Dimensions

5.86 x 2.68 x 0.31 inches (148.9 x 68.1 x 8.0 mm)
5.69 x 2.72 x 0.31 inches (144.4 x 69.2 x 7.9 mm)

Weight

5.47 oz (155 g)
the average is 6.1 oz (173 g)
4.94 oz (140 g)
the average is 6.1 oz (173 g)

Materials

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

Resistance

Water, Dust; IP 68
 

Biometrics

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

Keys

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

Colors

Midnight black, Orchid gray, Arctic silver, Coral blue, Maple gold, Rose pink, Burgundy red
Black, Coral, Blue, White

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

LTE (TDD)

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

UMTS

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

GSM

850, 900, 1800, 1900 MHz
850, 900, 1800, 1900 MHz

Data Speed

LTE-A Pro Cat 16 (1000/150 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, UMTS
LTE-A Cat 12/13 (600/150 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s

2G Data

EDGE, GPRS
EDGE, GPRS

Dual SIM

 
Yes

SIM type

Nano SIM
Nano SIM

HD Voice

Yes
 

Global Roaming

Yes
Yes

Multimedia

Headphones

3.5mm jack
3.5mm jack

Speakers

Earpiece, Loudspeaker
Earpiece, Loudspeaker

Features

32-Bit DAC, aptX-HD
Dolby Atmos, Album art cover, Background playback

Screen mirroring

DLNA, Wireless screen share, MHL
Wireless screen share

Radio

 
FM

Additional microphone(s)

for Noise cancellation, Video recording
for Noise cancellation

Connectivity & Features

Bluetooth

5.0, EDR
5.0

Profiles/ Protocols

Advanced Audio Distribution (A2DP), Audio/Visual Remote Control Profile (AVRCP), Device ID Profile (DID), Handsfree (HFP), Headset (HSP), HID over GATT Profile (HOGP), Human Interface Device (HID), Message Access Profile (MAP), Object Push (OPP), Personal Area Networking Profile (PAN), Phone Book Access (PBAP)
Advanced Audio Distribution (A2DP), Audio/Visual Remote Control Profile (AVRCP), Generic Access (GAP), Handsfree (HFP), Headset (HSP), Message Access Profile (MAP), Object Push (OPP), Phone Book Access (PBAP)

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, Video out, Mass storage device
Charging, Mass storage device

Location

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

Mobile Payment

Samsung Pay
Samsung Pay

Other

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

Hearing aid compatible

M3, T3
 

Regulatory Approval

FCC approval

 
 

Date approved

Apr 06, 2017
Mar 08, 2019

FCC ID value: A3LSMG950U link
FCC ID value: A3LSMA405FN link

Measured SAR

 
 

Head

0.49 W/kg
0.51 W/kg

Body

0.48 W/kg
0.46 W/kg

Simultaneous Transmission

1.53 W/kg
1.02 W/kg

Wireless Router

0.46 W/kg
0.61 W/kg

Availability

Officially announced

Mar 29, 2017
Apr 10, 2019
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