Samsung Galaxy A9 (2018) vs Samsung Galaxy A51
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Display
Size
Resolution
Technology
Super AMOLED
Super AMOLED
Screen-to-body
80.51 %
87.37 %
Features
Ambient light sensor, Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
Hardware
System chip
Qualcomm Snapdragon 660 SDM660
Samsung Exynos 9611
Processor
GPU
Adreno 512
Mali-G72 MP3
RAM
Internal storage
128GB, available to use: 108.9 GB
128GB, available to use: 105.9 GB
Storage expansion
microSDXC up to 512 GB
microSDXC up to 512 GB
OS
Android (10, 9.0 Pie, 8.0 Oreo), Samsung One UI
Android (10), Samsung One UI
Battery
Capacity
3800 mAh
4000 mAh
Type
Li - Polymer, Not user replaceable
Li - Polymer, Not user replaceable
Charging
Samsung Adaptive Fast Charging
Fast charging
Camera
Rear
Quad camera
Quad camera
Main camera
Specifications
Aperture size: F1.7; Focal length: 27 mm; Sensor size: 1/2.8"; Pixel size: 0.9 μm
Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm
Second camera
10 MP (Telephoto, Autofocus)
12 MP (Ultra-wide)
Specifications
Optical zoom: 2x; Aperture size: F2.4; Focal Length: 52 mm; Sensor size: 1/3.9"; Pixel size: 1 μm
Aperture size: F2.2; Focal Length: 13 mm; Pixel size: 1.12 μm
Third camera
8 MP (Ultra-wide)
5 MP (Macro)
Specifications
Aperture size: F2.4; Focal Length: 12 mm; Sensor size: 1/4"; Pixel size: 1.12 μm
Aperture size: F2.4; Focal Length: 40 mm
Fourth camera
5 MP (Depth information)
5 MP (Depth information)
Specifications
Aperture size: F2.2; Focal Length: 24 mm; Sensor size: 1/5"; Pixel size: 1.12 μm
Aperture size: F2.2; Sensor size: 1/5"; Pixel size: 1.12 μm
Video recording
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (30 fps)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (240 fps)
Features
Hyperlapse, Continuous autofocus, EIS, Video calling, Video sharing
Hyperlapse, EIS
Front
24 MP
32 MP (HDR)
Design
Dimensions
Weight
the average is 6.2 oz (176 g)
the average is 6.2 oz (176 g)
Materials
Back: Glass; Frame: Metal
Back: Plastic; Frame: Plastic
Biometrics
2D Face unlock, Fingerprint (touch)
2D Face unlock, In-screen fingerprint
Colors
Caviar black, Lemonade blue, Bubblegum pink
Prism Crush black, Prism Crush white, Prism Crush pink, Prism Crush 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), 20(800 DD), 26(850+), 28(700 APT), 66(AWS-3)
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 14(700 PS), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 29(700 d), 30(2300 WCS), 66(AWS-3), 71(600)
LTE (TDD)
Bands 38(2600), 40(2300), 41(2600+)
Bands 38(2600), 39(1900+), 41(2600+)
UMTS
850, 900, 1700/2100, 1900, 2100 MHz
850, 900, 1700/2100, 1900, 2100 MHz
Data Speed
SIM type
Nano SIM
Nano SIM
Multimedia
Headphones
3.5mm jack
3.5mm jack
Speakers
Earpiece, Loudspeaker
Earpiece, Loudspeaker
Features
Album art cover, Background playback
Dolby Atmos
Screen mirroring
Wireless screen share
Wireless screen share
Radio
FM
FM
Additional microphone(s)
for Noise cancellation
Connectivity & Features
Bluetooth
5.0
5.0
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 2.0
Type-C (reversible), USB 2.0
Features
Charging, Mass storage device
Charging, OTG
Location
GPS, A-GPS, Glonass, Galileo, BeiDou
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Sensors
Accelerometer, Gyroscope, Compass, Hall (for flip covers)
Accelerometer, Gyroscope, Compass, Hall (for flip covers)
Other
NFC, ANT+, VoIP, Tethering, Computer sync, OTA sync
NFC, ANT+
Regulatory Approval
FCC approval
Date approved
Oct 18, 2018
Nov 28, 2019
Measured SAR
Head
0.24 W/kg
0.89 W/kg
Body
0.84 W/kg
1.18 W/kg
Simultaneous Transmission
1.58 W/kg
1.56 W/kg
Wireless Router
1.40 W/kg
1.12 W/kg
Phablet
3.95 W/kg
2.76 W/kg
Buyers information
In The Box
Charger, USB cable, Headphones, SIM removal tool, Documentation
Price
$ 400
