Samsung Galaxy A9 (2018) vs Samsung Galaxy A51
Display
Size
Resolution
Pixel density
Technology
Super AMOLED
Super AMOLED
Screen-to-body
80.51 %
87.37 %
Features
Ambient light sensor, Proximity sensor
Ambient light sensor, Proximity sensor
Hardware & Performance
System chip
Qualcomm Snapdragon 660 SDM660
Samsung Exynos 9611
Processor
GPU
Adreno 512
Mali-G72 MP3
RAM
Internal storage
128GB
128GB
Storage expansion
microSDXC up to 512 GB
microSDXC up to 512 GB
OS
Android (8.0 Oreo), Samsung Experience 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
Features
Phase-detection autofocus
Phase-detection autofocus
Second camera
10 megapixels
12 megapixels
Features
Telephoto, Autofocus
Ultra-wide
Third camera
8 megapixels
5 megapixels
Features
Ultra-wide
Macro
Fourth camera
5 megapixels
5 megapixels
Features
Depth information
Depth information
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, Digital image stabilization, Video calling, Video sharing
Hyperlapse, Digital image stabilization
Front
24 megapixels
32 megapixels
Features
High Dynamic Range mode (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
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), 17(700 b), 20(800 DD), 26(850+), 28(700 APT), 66(AWS-3)
LTE (TDD)
Bands 38(2600), 40(2300), 41(2600+)
Bands 38(2600), 40(2300), 41(2600+)
UMTS
850, 900, 1700/2100, 1900, 2100 MHz
850, 900, 1700/2100, 1900, 2100 MHz
Data Speed
Dual SIM
Yes
SIM type
Nano SIM
Nano SIM
Multimedia
Headphones
3.5mm jack
3.5mm jack
Features
Album art cover, Background playback
Dolby Atmos
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
Sensors
Accelerometer, Gyroscope, Compass, Hall (for flip covers)
Accelerometer, Gyroscope, Compass
Other
NFC, ANT+, VoIP, Tethering, Computer sync, OTA sync
NFC, ANT+
Shopping information
In The Box
Charger, USB cable, Headphones, SIM removal tool, Documentation
