Samsung Galaxy S8 vs Samsung Galaxy J7 Star
Compare phone and tablet specifications of up to three devices. Type a model name in the search field of our phone specs comparison tool or pick a popular device from the ones below.
Display
Size
Resolution
Technology
Super AMOLED
TFT
Screen-to-body
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
Hardware
System chip
Qualcomm Snapdragon 835 MSM8998
Samsung Exynos 7 Octa 7870
Processor
GPU
Adreno 540
Mali-T830 MP1
RAM
Internal storage
64GB
32GB
Storage expansion
microSDXC up to 256 GB
microSDXC up to 400 GB
Device type
Smartphone
Smartphone
OS
Android (9.0 Pie, 8.0 Oreo, 7.0 Nougat), Samsung One UI
Android (9.0 Pie, 8.0 Oreo), Samsung One UI
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
Camera
Rear
Single camera
Single camera
Main camera
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
HDR, Time-lapse video, Hyperlapse, Continuous autofocus, Object tracking, Picture-taking during video recording, Video light, EIS, Video calling, Video sharing
Front
8 MP (Wide Angle, Autofocus, HDR)
13 MP
Design
Dimensions
Weight
the average is 6.3 oz (179 g)
the average is 6.3 oz (179 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
Keys
Left: Volume control, Other; Right: Lock/Unlock key
Left: Volume control; Right: Lock/Unlock key
Colors
Midnight black, Orchid gray, Arctic silver, Coral blue, Maple gold, Rose pink, Burgundy red
Blue
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 2(1900), 4(AWS-1), 5(850), 12(700 a), 66(AWS-3), 71(600)
LTE (TDD)
Bands 38(2600), 39(1900+), 40(2300), 41(2600+)
UMTS
850, 900, 1900, 2100 MHz
850, 1700/2100, 1900, 2100 MHz
Data Speed
SIM type
Nano SIM
Nano SIM
HD Voice
Yes
Yes
Multimedia
Headphones
3.5mm jack
3.5mm jack
Speakers
Earpiece, Loudspeaker
Earpiece, Loudspeaker
Features
32-Bit DAC, aptX-HD
Screen mirroring
DLNA, Wireless screen share, MHL
Wireless screen share
Additional microphone(s)
for Noise cancellation, Video recording
Connectivity & Features
Bluetooth
5.0, EDR
4.2
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
microUSB, USB 2.0
Features
Charging, Video out, Mass storage device
Charging
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
Other
NFC, ANT+, UMA (Wi-Fi Calling), Tethering, Computer sync, OTA sync
NFC, ANT+, UMA (Wi-Fi Calling)
Hearing aid compatible
M3, T3
M3, T3
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
Buyers information
In The Box
USB cable, Wall charging adapter, Start guide, Terms & Conditions
Availability
Officially announced
Mar 29, 2017
