Xiaomi Mi 9 vs Samsung Galaxy A51
Display
Size
Resolution
Pixel density
Technology
AMOLED
Super AMOLED
Screen-to-body
85.23 %
87.37 %
Features
HDR video support, Oleophobic coating, Scratch-resistant glass (Corning Gorilla Glass 6), Ambient light sensor, Proximity sensor
Ambient light sensor, Proximity sensor
Hardware & Performance
System chip
Qualcomm Snapdragon 855
Samsung Exynos 9611
Processor
GPU
Adreno 640
Mali-G72 MP3
RAM
Internal storage
128GB, not expandable
128GB
Storage expansion
microSDXC up to 512 GB
OS
Android (9.0 Pie), Xiaomi MI UI
Android (10), Samsung One UI
Battery
Capacity
3300 mAh
4000 mAh
Type
Not user replaceable
Li - Polymer, Not user replaceable
Charging
Qualcomm Quick Charge 4+, Qi wireless charging
Fast charging
Camera
Rear
Triple camera
Quad camera
Main camera
Features
Sapphire crystal lens cover, Laser and Phase-detection autofocus, CMOS image sensor
Phase-detection autofocus
Second camera
12 megapixels
12 megapixels
Features
Telephoto, Sapphire crystal lens cover, Phase-detection autofocus
Ultra-wide
Third camera
16 megapixels
5 megapixels
Features
Ultra-wide, Sapphire crystal lens cover, Phase-detection autofocus
Macro
Fourth camera
5 megapixels
Features
Depth information
Video recording
3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (960 fps), 1280x720 (HD) (960 fps)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (240 fps)
Features
Continuous autofocus, Digital image stabilization, Video calling, Video sharing
Hyperlapse, Digital image stabilization
Front
20 megapixels
32 megapixels
Features
High Dynamic Range mode (HDR)
High Dynamic Range mode (HDR)
Design
Dimensions
Weight
the average is 6.2 oz (177 g)
the average is 6.2 oz (177 g)
Materials
Back: Glass (Corning Gorilla Glass 5); Frame: Metal
Back: Plastic
Biometrics
In-screen fingerprint
2D Face unlock, In-screen fingerprint
Colors
Black, Purple, Blue
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), 17(700 b), 20(800 DD), 28(700 APT)
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), 39(1900+), 40(2300)
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
Yes
SIM type
Nano SIM
Nano SIM
HD Voice
Yes
VoLTE
Yes
Multimedia
Headphones
No 3.5mm jack
3.5mm jack
Features
aptX-HD
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
Mass storage device, OTG, Charging, Headphones port
Charging, OTG
Sensors
Accelerometer, Gyroscope, Compass
Accelerometer, Gyroscope, Compass
Other
NFC, Infrared, VoIP, Tethering, Computer sync, OTA sync
NFC, ANT+
Phone features
Notifications
Haptic feedback, Music ringtones, Vibration
Other features
Voice dialing, Voice commands, Voice recording
Shopping information
In The Box
Case, 18W Charger, USB Type-C cable, Type-c to 3.5 mm adapter, SIM removal tool, Documentation
