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
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
Front
8 megapixels
13 megapixels
Features
Wide Angle, Autofocus, High Dynamic Range mode (HDR)
Design
Dimensions
Weight
the average is 6.1 oz (174 g)
the average is 6.1 oz (174 g)
Materials
Back: Glass (Corning Gorilla Glass 5); Frame: Aluminum
Resistance
Water, Dust; 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
Multimedia
Headphones
3.5 mm jack
3.5 mm jack
Speakers
Earpiece, Loudspeaker
Earpiece, Loudspeaker
Features
Album art cover, Background playback
Screen mirroring
DLNA, Wireless screen share, MHL
Wireless screen share
Additional microphone(s)
for Noise cancellation, Video recording
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
microSDXC up to 256 GB
microSDXC up to 400 GB
OS
Android (9.0 Pie, 8.0 Oreo, 7.0 Nougat), Samsung One UI
Android (9.0 Pie, 8.0 Oreo), Samsung One UI
Connectivity & Features
Bluetooth
5.0, EDR
4.2
Wi-Fi
802.11 a, b, g, n, ac, dual-band; MIMO, Hotspot, Wi-Fi Direct
802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot
USB
USB Type-C (reversible), USB 3.1
microUSB, USB 2.0
Features
Mass storage device, Video out
Location
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass, Cell ID, Wi-Fi positioning
Sensors
Accelerometer, Gyroscope, Compass, Hall (for flip covers), Barometer
Accelerometer, Gyroscope, Compass
Mobile Payment
Samsung Pay
Other
NFC, ANT+, UMA (Wi-Fi Calling), Tethering, Computer sync, OTA sync
NFC, ANT+, UMA (Wi-Fi Calling)
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
Data
SIM type
Nano SIM
Nano SIM
HD Voice
Yes
Yes
Battery
Capacity
3000 mAh
3300 mAh
Type
Li - Ion, Not user replaceable
Li - Polymer, Not user replaceable
Charging
Qualcomm Quick Charge 2.0, Qi and Powermat wireless charging
Talk time
the average is 20 h (1174 min)
the average is 20 h (1174 min)
Stand-by time
the average is 20 days (491 h)
the average is 20 days (491 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
Phone features
Notifications
Haptic feedback
Other features
Voice dialing, Voice commands, Voice recording, TTY/TDD
Regulatory Approval
FCC approval
Date approved
Apr 06, 2017
May 10, 2018
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
