Samsung Galaxy S8 vs Samsung Galaxy J7 Star
Display
Display size
Resolution
Pixel density
Technology
Super AMOLED
TFT
Screen-to-body ratio
84.26 %
71.45 %
Features
HDR video support, Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor
Camera
Rear
Single camera
Single camera
Main camera
Hardware 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: 28 mm; Sensor size: 1/3.06"; Pixel size: 1.12 μm
Flash
LED
LED
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
Video calling, Video sharing
Front
8 megapixels
13 megapixels
Features
Wide Angle, Autofocus, High Dynamic Range mode (HDR)
Design
Dimensions
Weight
the average is 6 oz (172 g)
the average is 6 oz (172 g)
Materials
Back: Glass (Corning Gorilla Glass 5); Frame: Aluminum
Resistance
Water, Dust
IP certified
IP 68
Biometrics
Iris scanner, 2D Face unlock, Fingerprint (touch)
2D Face unlock
Features
Touch sensitive control keys
Colors
Black, Gold, Silver, Purple, Pink, Blue
Blue
Hardware & Performance
System chip
Qualcomm Snapdragon 835 MSM8998
Samsung Exynos 7 Octa 7870
Processor
GPU
Adreno 540
Mali-T830 MP1
RAM
Internal storage
64 GB
32 GB
Storage expansion
up to 256 GB
up to 400 GB
OS
Android (9.0 Pie, 8.0 Oreo, 7.0 Nougat), Samsung One UI
Android (8.0 Oreo)
Battery
Capacity
3000 mAh
3300 mAh
Charging
Qualcomm Quick Charge 2.0, Qi and Powermat wireless charging
Talk time
the average is 22 h (1342 min)
the average is 22 h (1342 min)
Stand-by time
the average is 20 days (480 h)
the average is 20 days (480 h)
Internet use
3G
12 hours
LTE
14 hours
Wi-Fi
14 hours
Music playback
88.00 hours
76.70 hours
Video playback
17.00 hours
19.00 hours
Cellular
LTE (FDD)
Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 29, 30, 66
Bands 2, 4, 5, 12, 66, 71
LTE (TDD)
Bands 38, 39, 40, 41
UMTS
850, 900, 1900, 2100 MHz
850, 1700/2100, 1900, 2100 MHz
GSM
850, 900, 1800, 1900 MHz
850, 900, 1800, 1900 MHz
Data
SIM type
Nano SIM
Nano SIM
HD Voice
Yes
Yes
Connectivity
Bluetooth
5.0, EDR
4.2
Wi-Fi
802.11 a, b, g, n, ac, dual-band
802.11 a, b, g, n, ac, dual-band
USB
USB 3.1
USB 2.0
Connector
USB Type-C (reversible)
microUSB
Features
Mass storage device, Video out
Mass storage device
Mobile Payment
Samsung Pay
Location
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass
Other
NFC, ANT+, UMA (Wi-Fi Calling), Tethering, Computer sync, OTA sync
NFC, ANT+, UMA (Wi-Fi Calling), VoIP, Tethering, Computer sync, OTA sync
Phone features
Sensors
Accelerometer, Gyroscope, Compass, Hall (for flip covers), Barometer
Accelerometer, Gyroscope, Compass
Notifications
Haptic feedback
Haptic feedback, Music ringtones, Vibration, Flight mode, Silent mode, Speakerphone
Hearing aid compatibility
M3, T3
M3, T3
Other features
Voice dialing, Voice commands, Voice recording, TTY/TDD
Voice dialing, Voice commands, Voice recording, TTY/TDD
Multimedia
Screen mirroring
DLNA, Wireless screen share, MHL
Wireless screen share
Speakers
Earpiece, Loudspeaker
Earpiece, Loudspeaker
Headphones connector
3.5mm
3.5mm
Additional microphone(s)
for Noise cancellation, Video recording
Regulatory Approval
FCC approval
Date approved
Apr 06, 2017
May 10, 2018
FCC measured SAR
Head
0.49 W/kg
1.36 W/kg
Body
0.48 W/kg
1.01 W/kg
Simultaneous Transmission
1.53 W/kg
1.58 W/kg
Wireless Router
0.46 W/kg
1.11 W/kg
Phablet
3.60 W/kg
Shopping information
In The Box
USB cable, Wall charging adapter, Start guide, Terms & Conditions
