Samsung Galaxy M21 vs Samsung Galaxy M31 vs Samsung Galaxy J7 Pro
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Last Updated: Wed, 30 Sep'20
Basic Information
General
- Bluetooth5.0, A2DP, LE5.0, A2DP, LE4.1, A2DP, LE
Design
- Height6.26 inches6.29 inches6.00 inches
- Width2.96 inches2.96 inches2.94 inches
- Thickness0.35 inches0.35 inches0.31 inches
- Weight188 g191 g181 g
- ColorMidnight Blue, BlackOcean Blue, Space BlackBlack, Blue, Gold, Rose Gold
- BuildGlass front (Gorilla Glass 3), plastic back, plastic frameGlass front (Gorilla Glass 3), plastic back, plastic frameFront glass, aluminum body
Display
- Screen Size6.4 inches6.4 inches5.5 inches
- Display TypeSuper AMOLED capacitive touchscreenSuper AMOLED capacitive touchscreenSuper AMOLED capacitive touchscreen
- Display Resolution1080 x 2340 pixels1080 x 2340 pixels1080 x 1920 pixels
- Pixel Density403 ppi411 ppi401 ppi
- Aspect Ratio19.5:919.5:9
- ProtectionCorning Gorilla Glass 3Corning Gorilla Glass 3
- Screen to Body Ratio84.20%84.1%73.10%
Performance
- GPUMali-G72 MP3Mali-G72 MP3Mali-T830 MP1
- OSAndroid 10.0 One UI 2Android 10, One UI 2.5Android 7.0 (Nougat), upgradable to Android 9.0 (Pie)
- Chipset GPExynos 9611 (10nm)Exynos 9611 (10nm)Exynos 7870 Octa (14 nm)
- CPUOcta-core (4x2.3 GHz Cortex-A73 and 4x1.7 GHz Cortex-A53)Octa-core (4x2.3 GHz Cortex-A73 4x1.7 GHz Cortex-A53)Octa-core 1.6 GHz Cortex-A53
Memory & Storage
- RAM/Internal Storage64GB 4GB RAM, 128GB 6GB RAM64GB 6GB RAM, 128GB 6GB RAM, 128GB 8GB RAM32/64 GB, 3 GB RAM
- Expandable MemorymicroSDXC (dedicated slot)microSDXC (dedicated slot)microSD, up to 256 GB (dedicated slot)
Back Camera
- Triple Camera48 MP, f/2.0, 26mm (wide), 1/2.0, 0.8 micron|8 MP, f/2.2, 12mm (ultrawide), 1/4.0, 1.12 micron|5 MP, f/2.2, (depth)64 MP, f/1.8, 26mm (wide), 1/1.72, 0.8 micron|8 MP, f/2.2, 12mm (ultrawide), 1/4.0, 1.12 micron|5 MP, f/2.2, 25mm (macro), 1/5.0, 1.12 micron|5 MP, f/2.2, (depth)
- AutofocusPDAFPDAFAF
- Back Camera Video4K30fps, 1080p30fps, gyro-EIS2160p30fps, 1080p30fps, gyro-EIS1080p30fps
- Back Camera FeaturesLED flash, panorama, HDRLED flash, panorama, HDRLED flash, panorama, HDR
Front Camera
- Single Camera20 MP, f/2.0, 26mm (wide)32 MP, f/2.0, 26mm (wide), 1/2.8, 0.8 micron13 MP, f/1.9, 28mm (wide)
- Front Camera Video1080p30fps1080p30fps1080p30fps
- Front Camera FeaturesHDRHDRLED flash
Sound
- HeadPhone JackYesYesYes
- LoudspeakerYesYesYes
- Audio FeaturesDolby AtmosDolby Atmos
Battery
- Battery Capacity6000 mAh battery6000 mAh battery3600 mAh
- User ReplaceableNon-removableNon-removableNon-removable
- ChargingFast charging 15WFast battery charging 15W
- Battery TypeLi-PoLi-PoLi-Ion
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, WiFi Direct, hotspot
- GPSYes, with A-GPS, GLONASS, BDSYes, with A-GPS, GLONASS, BDSYes, with A-GPS, GLONASS, BDS
- RadioFM radio, RDS, recordingFM radio, RDS, recordingFM radio
- USB2.0, Type-C 1.0 reversible connector2.0, Type-C 1.0 reversible connectormicroUSB 2.0, USB On-The-Go
- NFCNoYes
- SIMDual SIM (Nano-SIM, dual stand-by)Dual SIM (Nano-SIM, dual stand-by)Single SIM (Nano-SIM) or Dual SIM (Nano-SIM, dual stand-by)
- Network SupportGSM / HSPA / LTEGSM / HSPA / LTEGSM / HSPA / LTE
Miscellaneous Features
- SensorsFingerprint (rear-mounted), accelerometer, gyro, proximity, compassFingerprint (rear-mounted), accelerometer, gyro, proximity, compassFingerprint (front-mounted), accelerometer, gyro, proximity, compass
Launch
- Announced On2020, March 182020, February 252017, June
- StatusAvailable. Released 2020, March 23Available. Released 2020, March 04Available. Released 2017, July
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