
Samsung Galaxy M51 vs Samsung Galaxy M31s vs Xiaomi Redmi Note 9 Pro Max



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Last Updated: Fri, 11 Sep'20
General
- Bluetooth5.0, A2DP, LE5.0, A2DP, LE5.0, A2DP, LE
Design
- Height6.40 inches6.27 inches6.52 inches
- Width3.05 inches2.92 inches3.02 inches
- Thickness0.33 inches0.36 inches0.35 inches
- Weight213 g203 g209 g
- ColorCelestial Black, Electric BlueMirage Black, Mirage BlueAurora Blue, Glacier White, Interstellar Black
- BuildGlass front (Gorilla Glass 3), plastic back, plastic frameGlass front (Gorilla Glass 5), glass back (Gorilla Glass 5), plastic frame
Display
- Screen Size6.7 inches6.5 inches6.67 inches
- Display TypeSuper AMOLED capacitive touchscreenSuper AMOLED capacitive touchscreenIPS LCD capacitive touchscreen
- Display Resolution1080 x 2340 pixels1080 x 2400 pixels1080 x 2400 pixels
- Pixel Density385 ppi405 ppi395 ppi
- Aspect Ratio19.5:920:0920:09
- ProtectionCorning Gorilla Glass 3Corning Gorilla Glass 3Corning Gorilla Glass 5
- Screen to Body Ratio87.40%91 %84.60%
Performance
- OSAndroid 10, One UI 2.1Android 10, One UI 2.5Android 10.0 MIUI 11
- GPUAdreno 618Mali-G72 MP3Adreno 618
- Chipset GPQualcomm SDM730 Snapdragon 730G (8 nm)Samsung Exynos 9 Octa 9611Qualcomm SM7125 Snapdragon 720G (8 nm)
- CPUOcta-core (2x2.2 GHz Kryo 470 Gold, 6x1.8 GHz Kryo 470 Silver)Octa core (2.3 GHz, Quad core, Cortex A73 + 1.7 GHz, Quad core, Cortex A53)Octa-core (2x2.3 GHz Kryo 465 Gold and 6x1.8 GHz Kryo 465 Silver)
Memory & Storage
- RAM/Internal Storage128GB 6GB RAM, 128GB 8GB RAM128GB 6GB RAM, 128GB 8GB RAM64GB 6GB RAM, 128GB 6GB RAM, 128GB 8GB RAM
- Expandable MemorymicroSDXC, up to 512GBmicroSDXC (dedicated slot), Up to 512 GBmicroSDXC (dedicated slot)
Back Camera
- Quad Camera64 MP, f/1.8, 26mm (wide), 1/1.72, 0.8 micron|12 MP, f/2.2, 123degree (ultrawide)|5 MP, f/2.4, (macro)|5 MP, f/2.4, (depth)64 MP, f/1.8, 26mm (wide), 1/1.72, 0.8 micron|12 MP, f/2.2, 123degree (ultrawide)|5 MP, f/2.4, (macro)|5 MP, f/2.4, (depth)64 MP, f/1.9, (wide), 1/1.72", 0.8micron, PDAF | 8 MP, f/2.2, 13mm (ultrawide), 1/4.0", 1.12micron | 5 MP, f/2.4, (macro), 1.12micron | 2 MP, f/2.4, (depth)
- AutofocusPDAFPDAFPDAF
- Back Camera Video4K30fps, 1080p30fps4K30fps, 1080p30fps, gyro-EIS4K30fps, 1080p30/60/120fps, 720p960fps, gyro-EIS
- Back Camera FeaturesLED flash, panorama, HDRLED flash, panorama, HDRLED flash, HDR, panorama
- OISNo
Front Camera
- Single Camera32 MP, f/2.0, 26mm (wide), 1/2.8, 0.8 micron32 MP, f/2.0, 26mm (wide), 1/2.8, 0.8 micron32 MP, (wide), 1/2.8, 0.8 micron
- Front Camera Video1080p30fps4K30fps, 1080p30fps1080p30fps
- Front Camera FeaturesHDRHDRHDR, panorama
Sound
- HeadPhone JackYesYesYes
- LoudspeakerYesYesYes
- Audio FeaturesDolby AtmosDolby Atmos
Battery
- Battery Capacity7000 mAh battery6000 mAh battery5020 mAh battery
- User Replaceablenon-removableNon-removableNon-removable
- Talk TimeUpto 64 HoursUp to 51 Hours (4G LTE)
- Music TimeUpto 182 HoursUp to 125 Hours Audio Playback Time
- ChargingFast charging 25W|Reverse Charging|100% in 115 minsFast charging 25W|Reverse chargingFast charging 33W, 50% in 30 min
- Battery TypeLi-PoLi-PoLi-Po
Communications
- WLANWi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspotWi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspotWi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot
- GPSYes, with A-GPS, GLONASS, GALILEO, BDSYes, with A-GPS, GLONASS, GALILEO, BDSYes, with A-GPS, GLONASS, GALILEO, BDS, NavIC
- RadioFM radioFM radio, RDS, recordingFM radio, recording
- USB2.0, Type-C 1.0 reversible connector2.0, Type-C 1.0 reversible connector, USB On-The-Go2.0, Type-C 1.0 reversible connector
- NFCYesNoNo
- SIMDual SIM (Nano-SIM, dual stand-by)Dual SIM (Nano-SIM, dual stand-by)Dual SIM (Nano-SIM, dual stand-by)
- Network SupportGSM / HSPA / LTEGSM / HSPA / LTEGSM / HSPA / LTE
Miscellaneous Features
- SensorsFingerprint (side-mounted), accelerometer, gyro, proximity, compassFingerprint (side-mounted), Accelerometer, Gyro Sensor, Geomagnetic Sensor, Light Sensor, Virtual Proximity SensingFingerprint (side-mounted), accelerometer, gyro, proximity, compass
Launch
- Announced On2020, August 312020, July 302020, March 12
- StatusAvailable. Released 2020, September 17Available. Released 2020, July 30Available. Released 2020, May 12