Samsung Galaxy A31 vs Xiaomi Redmi Note 9S 4GB

Key Specs
Display 6.4"
Battery 5000 mAh
Camera 48 MP + 8 MP + 5 MP + 5 MP
Storage 128 GB 4 GB RAM
Network
TechnologyGSM / HSPA / LTE
2G bandsGSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only)
3G bandsHSDPA 850 / 900 / 1900 / 2100
4G bands1, 2, 3, 5, 7, 8, 20, 28, 38, 40, 41
SpeedHSPA 42.2/5.76 Mbps, LTE-A
Launch
Announced2020, March 24
StatusAvailable. Released 2020, April 27
Body
Dimensions159.3 x 73.1 x 8.6 mm (6.27 x 2.88 x 0.34 in)
Weight185 g (6.53 oz)
SIMSingle SIM (Nano-SIM) or Dual SIM (Nano-SIM, dual stand-by)
Display for Samsung Galaxy A31
TypeSuper AMOLED capacitive touchscreen, 16M colors
Size6.4 inches, 98.9 cm2 (~84.9% screen-to-body ratio)
Resolution1080 x 2400 pixels, 20:9 ratio (~411 ppi density)
Platform
OSAndroid 10, One UI 2.0
CPUOcta-core (2x2.0 GHz & 6x1.7 GHz)
Memory
Card slotmicroSDXC (dedicated slot)
Internal 128GB 4GB RAM
Main Camera
Quad48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8痠, PDAF
8 MP, f/2.2, 13mm (ultrawide), 1/4.0", 1.12痠
5 MP, f/2.4, (macro)
5 MP, f/2.4, (depth)
FeaturesLED flash, panorama, HDR
Video1080p@30fps
Selfie camera
Single20 MP, f/2.2, (wide)
Video1080p@30fps
Sound
Loudspeaker Yes
3.5mm jack Yes
Comms
WLANWi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot
Bluetooth5.0, A2DP, LE
GPSYes, with A-GPS, GLONASS, GALILEO, BDS
NFCYes (market/region dependent)
RadioUnspecified
USB2.0, Type-C 1.0 reversible connector, USB On-The-Go
Features
SensorsFingerprint (under display, optical), accelerometer, gyro, proximity, compass
Battery
 Non-removable Li-Po 5000 mAh battery
ChargingFast charging 15W
space
Key Specs
Display 6.67"
Battery 5020 mAh
Camera 48 MP + 8 MP + 5 MP + 2 MP
Storage 64 GB 4 GB RAM
Network
TechnologyGSM / HSPA / LTE
2G bandsGSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bandsHSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands1, 2, 3, 4, 5, 7, 8, 20, 28, 38, 40
SpeedHSPA 42.2/5.76 Mbps, LTE-A
Launch
Announced2020, March 23
StatusAvailable. Released 2020, April 30
Body
Dimensions165.8 x 76.7 x 8.8 mm (6.53 x 3.02 x 0.35 in)
Weight209 g (7.37 oz)
BuildGlass front (Gorilla Glass 5), glass back (Gorilla Glass 5), plastic frame
SIMDual SIM (Nano-SIM, dual stand-by)
 Water-repellent coating
Display for Xiaomi Redmi Note 9S 4GB
TypeIPS LCD capacitive touchscreen, 16M colors
Size6.67 inches, 107.4 cm2 (~84.5% screen-to-body ratio)
Resolution1080 x 2400 pixels, 20:9 ratio (~395 ppi density)
ProtectionCorning Gorilla Glass 5
 450 nits typ. brightness (advertised)
HDR10
Platform
OSAndroid 10, MIUI 12
ChipsetQualcomm SM7125 Snapdragon 720G (8 nm)
CPUOcta-core (2x2.3 GHz Kryo 465 Gold & 6x1.8 GHz Kryo 465 Silver)
GPUAdreno 618
Memory
Card slotmicroSDXC (dedicated slot)
Internal 64GB 4GB RAM
 UFS 2.1
Main Camera
Quad48 MP, f/1.8, 26mm (wide), 1/2.0", 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)
FeaturesLED flash, HDR, panorama
Video4K@30fps, 1080p@30/60/120fps, 720p@960fps, gyro-EIS
Selfie camera
Single16 MP, f/2.5, (wide), 1/3.06" 1.0µm
FeaturesHDR, panorama
Video1080p@30/120fps
Sound
Loudspeaker Yes
3.5mm jack Yes
Comms
WLANWi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot
Bluetooth5.0, A2DP, LE
GPSYes, with A-GPS, GLONASS, GALILEO, BDS
Infrared portYes
RadioFM radio, recording
USBUSB Type-C 2.0, USB On-The-Go
Features
SensorsFingerprint (side-mounted), accelerometer, gyro, proximity, compass
Battery
TypeLi-Po 5020 mAh, non-removable
ChargingFast charging 18W
Tests
PerformanceAnTuTu: 254000 (v8)
GeekBench: 1785 (v5.1)
GFXBench: 26fps (ES 3.1 onscreen)
DisplayContrast ratio: 1389:1 (nominal)
CameraPhoto / Video
Loudspeaker-27.8 LUFS (Good)
Battery life
Endurance rating 127h