Samsung Galaxy J7 (2017) vs Samsung Galaxy A21
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
IPS LCD
Screen-to-body
73.28 %
79.20 %
Features
Ambient light sensor, Proximity sensor
Ambient light sensor, Proximity sensor
Hardware
System chip
Samsung Exynos 7 Octa 7870
Mediatek Helio P35
Processor
GPU
Mali-T830 MP2
PowerVR GE8320
RAM
Internal storage
16GB, available to use: 10 GB
32GB (eMMC 5.1), available to use: 19.8 GB
Storage expansion
microSDXC up to 256 GB
microSDXC up to 512 GB
OS
Android (9.0 Pie, 7.0 Nougat), Samsung One UI
Android (10), Samsung One UI
Battery
Capacity
3600 mAh
4000 mAh
Type
Not user replaceable
Li - Polymer, Not user replaceable
Charging
Fast charging
Max charge speed
Wired: 15.0W
Camera
Rear
Single camera
Quad camera
Main camera
Specifications
Aperture size: F1.7
Aperture size: F1.8; Sensor size: 1/3.06"; Pixel size: 1 μm
Second camera
8 MP (Ultra-wide)
Specifications
Aperture size: F2.2; Sensor size: 1/4"; Pixel size: 1.12 μm
Third camera
2 MP (Macro)
Specifications
Aperture size: F2.4
Fourth camera
2 MP (Depth information)
Specifications
Aperture size: F2.4
Video recording
1920x1080 (Full HD) (30 fps)
1920x1080 (Full HD) (30 fps)
Features
Video calling, Video sharing
Front
13 MP (Flash)
13 MP
Design
Dimensions
Weight
the average is 6.2 oz (178 g)
the average is 6.2 oz (178 g)
Materials
Back: Aluminum
Back: Plastic; Frame: Plastic
Biometrics
Fingerprint (touch)
Fingerprint (touch)
Features
Touch sensitive control keys
Colors
Black, Gold, Silver, Rose gold
Black
Cellular
LTE (FDD)
Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD)
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), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 66(AWS-3), 71(600)
LTE (TDD)
Bands 40(2300)
Bands 38(2600), 39(1900+), 40(2300), 41(2600+)
UMTS
850, 900, 1900, 2100 MHz
850, 900, 1700/2100, 1900, 2100 MHz
Data Speed
SIM type
Nano SIM
Nano SIM
HD Voice
Yes
VoLTE
Yes
Multimedia
Headphones
3.5mm jack
3.5mm jack
Speakers
Earpiece, Loudspeaker
Earpiece, Loudspeaker
Features
Album art cover, Background playback
Screen mirroring
Wireless screen share
Wireless screen share
Radio
FM
FM
Connectivity & Features
Bluetooth
4.1
5.0
Wi-Fi
802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot
USB
microUSB, USB 2.0
Type-C (reversible), USB 2.0
Features
Charging, OTG, Mass storage device
Charging
Location
GPS, A-GPS, Glonass, BeiDou
GPS, A-GPS, Glonass, BeiDou, Cell ID, Wi-Fi positioning
Sensors
Accelerometer, Gyroscope, Compass, Hall (for flip covers)
Accelerometer, Gyroscope, Compass
Other
NFC, ANT+, UMA (Wi-Fi Calling), Tethering, Computer sync, OTA sync
NFC
Regulatory Approval
Measured SAR
Head
0.42 W/kg
Body
1.27 W/kg
Simultaneous Transmission
1.27 W/kg
Wireless Router
1.27 W/kg
Buyers information
Price
$ 250
