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Specifications
 

Samsung Galaxy A51

Xiaomi Redmi Note 9 Pro

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Samsung Galaxy A51
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Samsung Galaxy A51

Xiaomi Redmi Note 9 Pro

Network
Technology GSM / HSPA / LTE GSM / HSPA / LTE
2G bands GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only) GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G Network HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
  HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G Network 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 26, 28, 38, 40, 41, 66 1, 2, 3, 4, 5, 7, 8, 20, 28, 38, 40, 41
Speed HSPA 42.2/5.76 Mbps, LTE-A HSPA 42.2/5.76 Mbps, LTE-A
Launch
Announced 2019, December 12 2020, April 30
Status Available. Released 2019, December 16 Available. Released 2020, May 05
Body
Dimensions 158.5 x 73.6 x 7.9 mm (6.24 x 2.90 x 0.31 in) 165.8 x 76.7 x 8.8 mm (6.53 x 3.02 x 0.35 in)
Weight 172 g (6.07 oz) 209 g (7.37 oz)
Build Glass front (Gorilla Glass 3), plastic back, plastic frame Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5), plastic frame
SIM Single SIM (Nano-SIM) or Dual SIM (Nano-SIM, dual stand-by) Dual SIM (Nano-SIM, dual stand-by)
Display
Type Super AMOLED IPS LCD
Size 6.5 inches, 102.0 cm2 (~87.4% screen-to-body ratio) 6.67 inches, 107.4 cm2 (~84.5% screen-to-body ratio)
Resolution 1080 x 2400 pixels, 20:9 ratio (~405 ppi density) 1080 x 2400 pixels, 20:9 ratio (~395 ppi density)
Protection Corning Gorilla Glass 3 Corning Gorilla Glass 5
Platform
OS Android 10, One UI 2.5 Android 10, MIUI 11
Chipset Exynos 9611 (10nm) Qualcomm SM7125 Snapdragon 720G (8 nm)
CPU Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53) Octa-core (2x2.3 GHz Kryo 465 Gold & 6x1.8 GHz Kryo 465 Silver)
GPU Mali-G72 MP3 Adreno 618
Memory
Card slot microSDXC (dedicated slot) microSDXC (dedicated slot)
Internal 64GB 4GB RAM, 128GB 4GB RAM, 128GB 6GB RAM, 128GB 8GB RAM 64GB 6GB RAM, 128GB 6GB RAM, 128GB 8GB RAM
 UFS 2.0 UFS 2.1
Main Camera
Modules 48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF
12 MP, f/2.2, 123˚ (ultrawide)
5 MP, f/2.4, (macro)
5 MP, f/2.2, (depth)
64 MP, f/1.9, 26mm (wide), 1/1.72", 0.8µm, PDAF
8 MP, f/2.2, 119˚ (ultrawide), 1/4.0", 1.12µm
5 MP, f/2.4, (macro), AF
2 MP, f/2.4, (depth)
Features LED flash, panorama, HDR LED flash, HDR, panorama
Video 4K@30fps, 1080p@30/120fps; gyro-EIS 4K@30fps, 1080p@30/60/120fps, 720p@960fps, gyro-EIS
Selfie Camera
Modules 32 MP, f/2.2, 26mm (wide), 1/2.8", 0.8µm 16 MP, f/2.5, (wide), 1/3.06", 1.0µm
Features HDR HDR, panorama
Video 4K@30fps, 1080p@30fps 1080p@30/120fps
Sound
Loudspeaker Yes Yes
3.5mm jack Yes Yes
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, hotspot
Bluetooth 5.0, A2DP, LE 5.0, A2DP, LE
GPS Yes, with A-GPS, GLONASS, GALILEO, BDS Yes, with A-GPS, GLONASS, GALILEO, BDS
NFC Yes Yes
Infrared port No Yes
Radio FM radio FM radio, recording
USB USB Type-C 2.0, USB On-The-Go USB Type-C 2.0, USB On-The-Go
Features
Sensors Fingerprint (under display, optical), accelerometer, gyro, proximity, compass Fingerprint (side-mounted), accelerometer, gyro, proximity, compass
 ANT+
Battery
Type Li-Po 4000 mAh, non-removable Li-Po 5020 mAh, non-removable
Charging Fast charging 15W Fast charging 30W
Stand-by
Talk time
Misc
Colors Prism Crush Black, Prism Crush White, Prism Crush Blue, Prism Crush Pink Tropical Green, Glacier White, Interstellar Gray
SAR 0.80 W/kg (head)     0.67 W/kg (body)     0.87 W/kg (head)     0.71 W/kg (body)    
SAR EU 0.37 W/kg (head)     1.59 W/kg (body)     0.66 W/kg (head)     1.02 W/kg (body)    
Models SM-A515F, SM-A515F/DSN, SM-A515F/DS, SM-A515F/DST, SM-A515F/DSM, SM-A515F/N, SM-A515U, SM-A515U1, SM-A515W M2003J6B2G
Price $ 264.99 / £ 216.90 / € 218.97 / ₹ 22,999 $ 207.05 / £ 189.00 / € 198.00
Tests
Performance AnTuTu: 113051 (v7), 175363 (v8)
GeekBench: 5401 (v4.4), 1294 (v5.1)
GFXBench: 5.6fps (ES 3.1 onscreen)
AnTuTu: 279625 (v8)
GeekBench: 1785 (v5.1)
GFXBench: 15fps (ES 3.1 onscreen)
Display Contrast ratio: Infinite (nominal) Contrast ratio: 1285:1 (nominal)
Camera Compare PHOTO / Compare VIDEO
Loudspeaker -28.6 LUFS (Average) -28.6 LUFS (Average)
Audio quality Noise -93.1dB / Crosstalk -87.3dB
Battery life Endurance rating 86h Endurance rating 123h

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