Comparison of Samsung Galaxy A51 and Xiaomi Mi 9

Comparison of Samsung Galaxy A51 and Xiaomi Mi 9 [S]ave

Attribute	Samsung Galaxy A51 ×	Xiaomi Mi 9 ×
General
Brand	Samsung	Xiaomi
Launch
Announced	2019-12-12	2019-02-20
Body
Width (mm)	7.9	7.6
Length (mm)	158.5	157.5
Height (mm)	73.6	74.7
Weight (g)	172	173
SIM	Single SIM (Nano-SIM)	Dual SIM (Nano-SIM, dual stand-by)
Front	Glass	Glass
Back	Plastic	Glass
Frame	Plastic	Aluminum
Network
Technology	GSM HSPA LTE	CDMA GSM HSPA LTE
2G bands	GSM 850 / 900 / 1800 / 1900	CDMA 800 & TD GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands	HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 HSDPA 850 / 900 / 1900 / 2100	HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands	1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 26, 28, 38, 40, 41, 66	1, 2, 3, 4, 5, 7, 8, 12, 17, 34, 38, 39, 40, 41 1, 2, 3, 4, 5, 7, 8, 12, 20, 28, 38, 39, 40 - Global
Speed	HSPA 42.2/5.76 Mbps LTE-A	HSPA 42.2/5.76 Mbps LTE-A (5CA) Cat18 1200/150 Mbps
Platform
OS	Android 10	Android 9.0 (Pie)
Chipset	Exynos 9611 (10nm)	Qualcomm SM8150 Snapdragon 855 (7 nm)
CPU	Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53)	Octa-core (1x2.84 GHz Kryo 485 & 3x2.42 GHz Kryo 485 & 4x1.78 GHz Kryo 485)
GPU	Mali-G72 MP3	Adreno 640
Memory
Card slot	microSDXC (dedicated slot)	No
Internal	128GB 4GB RAM 128GB 6GB RAM 128GB 8GB RAM 256GB 8GB RAM 64GB 4GB RAM	128GB 6GB RAM 128GB 8GB RAM 256GB 8GB RAM 64GB 6GB RAM 64GB 8GB RAM
Display
Size (in)	6.5	6.39
Resolution (px)	1080 x 2400	1080 x 2340
Protection	Corning Gorilla Glass 3	Corning Gorilla Glass 6
Display Type	Super AMOLED	Super AMOLED
Battery
Type	Li-Po	Li-Po
Charging	Fast charging 15W	Fast charging 27W, Quick Charge 4+, Fast wireless charging 20W
Capcity (mAh)	4000	3300
Main Camera
Main Camera Type	Quad	Triple
Main Camera Properties	12 MP, f/2.2, 123˚ (ultrawide) 48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF 5 MP, f/2.2, (depth) 5 MP, f/2.4, (macro)	12 MP, f/2.2, 54mm (telephoto), 1/3.6", 1.0µm, PDAF, 2x optical zoom 16 MP, f/2.2, 13mm (ultrawide), 1/3.0", 1.0µm, PDAF 48 MP, f/1.8, 27mm (wide), 1/2.0", 0.8µm, PDAF, Laser AF
Main Camera Video	4K@30fps, 1080p@30/120fps, gyro-EIS	4K@30/60fps, 1080p@30/120/240fps, 1080p@960fps
Main Camera Features	LED flash, panorama, HDR	Dual-LED flash, HDR, panorama
Selfie Camera
Selfie Camera Type	Single	Single
Selfie Camera Properties	32 MP, f/2.2, 26mm (wide), 1/2.8", 0.8µm	20 MP, f/2.0, (wide), 1/3", 0.9µm
Selfie Camera Video	4K@30fps, 1080p@30fps	1080p@30fps
Selfie Camera Features	HDR	HDR
Comms
WLAN	Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot	Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA, hotspot
Bluetooth	5.0, A2DP, LE	5.0, A2DP, LE, aptX HD
GPS	+	+
NFC	+	+
Radio	FM radio	No
USB	USB Type-C 2.0, USB On-The-Go	USB Type-C 2.0, USB On-The-Go
Sound
Loudspeaker	+	+
3.5mm jack	+	-
Features
Sensors	Fingerprint (under display accelerometer compass gyro optical) proximity	Fingerprint (under display accelerometer compass gyro optical) proximity
Misc
Colors	Prism Crush Black Prism Crush Blue Prism Crush Pink Prism Crush White	Lavender Violet Ocean Blue Piano Black
Models	SM-A515F SM-A515F/DS SM-A515F/DSM SM-A515F/DSN SM-A515F/DST SM-A515F/N SM-A515U SM-A515U1 SM-A515W SM-A515X	M1902F1G
SAR EU Head (W/kg)	0.37	1.39
SAR EU Body (W/kg)	1.59	1.3
SAR Head (W/kg)	0.8	0.99
SAR Body (W/kg)	0.67	1.04
Infrared port	-	Yes