Samsung Galaxy J7 Star vs Samsung Galaxy A20
Display
Display size
Resolution
Pixel density
Technology
TFT
Super AMOLED
Screen-to-body ratio
71.45 %
84.95 %
Features
Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor
Proximity sensor
Camera
Rear
Single camera
Dual camera
Main camera
Hardware Features
Phase detection autofocus
Autofocus
Specifications
Aperture size: F1.7; Focal length: 28 mm; Sensor size: 1/3.06"; Pixel size: 1.12 μm
Aperture size: F1.9; Focal length: 27 mm; Sensor size: 1/3.1"; Pixel size: 1.12 μm
Second camera
5 megapixels
Hardware Features
Ultra-wide
Specifications
Aperture size: F2.2; Focal Length: 13 mm; Sensor size: 1/5"; Pixel size: 1.12 μm
Flash
LED
LED
Video recording
1920x1080 (Full HD) (30 fps)
1920x1080 (Full HD) (30 fps)
Features
Video calling, Video sharing
Video calling, Video sharing
Front
13 megapixels
8 megapixels
Design
Dimensions
Weight
the average is 6 oz (172 g)
the average is 6 oz (172 g)
Materials
Back: Plastic
Biometrics
2D Face unlock
2D Face unlock, Fingerprint (touch)
Features
Touch sensitive control keys
Colors
Blue
Black, Blue, Red
Multimedia
Headphones
3.5 mm jack
3.5 mm jack
Speakers
Earpiece, Loudspeaker
Earpiece, Loudspeaker
Features
Album art cover, Background playback
Album art cover, Background playback
Screen mirroring
Wireless screen share
Wireless screen share
Additional microphone(s)
for Noise cancellation
Hardware & Performance
System chip
Samsung Exynos 7 Octa 7870
Samsung Exynos 7884
Processor
GPU
Mali-T830 MP1
Mali-G71 MP2
RAM
Internal storage
32 GB
32 GB
Maximum User Storage
21.7 GB
Storage expansion
microSDXC up to 400 GB
microSDXC up to 512 GB
OS
Android (8.0 Oreo)
Android (9.0 Pie), Samsung One UI
Connectivity & Features
Bluetooth
4.2
5.0
Wi-Fi
802.11 a, b, g, n, ac, dual-band; Hotspot, Wi-Fi Direct
802.11 b, g, n; Hotspot, Wi-Fi Direct
USB
microUSB, USB 2.0
USB Type-C (reversible), USB 2.0
Features
Mass storage device
Mass storage device
Location
GPS, A-GPS, Glonass
GPS, A-GPS, Glonass, BeiDou, Cell ID, Wi-Fi positioning
Sensors
Accelerometer, Gyroscope, Compass
Accelerometer, Gyroscope, Compass, Hall (for flip covers)
Other
NFC, ANT+, UMA (Wi-Fi Calling), VoIP, Tethering, Computer sync, OTA sync
VoIP, Tethering, Computer sync, OTA sync
Cellular
LTE (FDD)
Bands 2, 4, 5, 12, 66, 71
Bands 1, 3, 5, 7, 8, 20
LTE (TDD)
Bands 38, 40, 41
UMTS
850, 1700/2100, 1900, 2100 MHz
850, 900, 1900, 2100 MHz
Data
Dual SIM
Yes
SIM type
Nano SIM
Nano SIM
HD Voice
Yes
Battery
Capacity
3300 mAh
4000 mAh
Type
Li - Polymer, Not user replaceable
Not user replaceable
Charging
Samsung Adaptive Fast Charging
Talk time
the average is 21 h (1288 min)
Stand-by time
the average is 19 days (457 h)
Talk time (3G)
the average is 23 h (1362 min)
Internet use
3G: 12 hours; LTE: 13 hours; Wi-Fi: 13 hours
Music playback
76.70 hours
82.00 hours
Video playback
19.00 hours
21.00 hours
Phone features
Notifications
Haptic feedback, Music ringtones, Vibration, Flight mode, Silent mode, Speakerphone
Haptic feedback, Music ringtones, Vibration
Other features
Voice dialing, Voice commands, Voice recording, TTY/TDD
Voice dialing, Voice commands, Voice recording
Regulatory Approval
FCC measured SAR
Head
1.36 W/kg
Body
1.01 W/kg
Simultaneous Transmission
1.58 W/kg
Wireless Router
1.11 W/kg
Phablet
3.60 W/kg
Shopping information
In The Box
USB cable, Wall charging adapter, Start guide, Terms & Conditions
MSRP price
$ 250
