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Samsung Galaxy M21
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Samsung Galaxy A31
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Samsung Galaxy M21

Samsung Galaxy A31
Our video review on Youtube
Network
Technology GSM / HSPA / LTE GSM / HSPA / LTE
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900
3G Network HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1900 / 2100 - SM-A315F
  HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - SM-A315G
4G Network 1, 3, 5, 7, 8, 20, 38, 40, 41 1, 2, 3, 5, 7, 8, 20, 38, 40, 41 - SM-A315F
  1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 28, 38, 40, 41, 66 - SM-A315G
Speed HSPA, LTE HSPA, LTE
Launch
Announced 2020, March 18 2020, March 24
Status Available. Released 2020, March 23 Available. Released 2020, April 27
Body
Dimensions 159 x 75.1 x 8.9 mm (6.26 x 2.96 x 0.35 in) 159.3 x 73.1 x 8.6 mm (6.27 x 2.88 x 0.34 in)
3D size compare
Weight 188 g (6.63 oz) 185 g (6.53 oz)
Build Glass front (Gorilla Glass 3), plastic back, plastic frame
SIM Nano-SIM
Nano-SIM + Nano-SIM		 Nano-SIM
Nano-SIM + Nano-SIM
Display
Type Super AMOLED, 420 nits (peak) Super AMOLED
Size 6.4 inches, 100.5 cm2 (~84.2% screen-to-body ratio) 6.4 inches, 98.9 cm2 (~84.9% screen-to-body ratio)
Resolution 1080 x 2340 pixels, 19.5:9 ratio (~403 ppi density) 1080 x 2400 pixels, 20:9 ratio (~411 ppi density)
Protection Corning Gorilla Glass 3
Platform
OS Android 10, upgradable to Android 11, One UI 3.1 Core Android 10, up to Android 12, One UI 4.1
Chipset Exynos 9611 (10 nm) Mediatek MT6768 Helio P65 (12 nm)
CPU Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53) Octa-core (2x2.0 GHz Cortex-A75 & 6x1.7 GHz Cortex-A55)
GPU Mali-G72 MP3 Mali-G52 MC2
Memory
Card slot microSDXC (dedicated slot) microSDXC (dedicated slot)
Internal 64GB 4GB RAM, 128GB 6GB RAM 64GB 4GB RAM, 128GB 4GB RAM, 128GB 6GB RAM, 128GB 8GB RAM
 UFS 2.1 eMMC 5.1
Main Camera
Modules 48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF
8 MP, f/2.2, 12mm (ultrawide), 1/4.0", 1.12µm
5 MP, f/2.2, (depth)		 48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF
8 MP, f/2.2, 123˚, (ultrawide), 1/4.0", 1.12µm
5 MP, f/2.4, (macro)
5 MP, f/2.4, (depth)
Features LED flash, panorama, HDR LED flash, panorama, HDR
Video 4K@30fps, 1080p@30fps, 720p@240fps, gyro-EIS 1080p@30fps
Selfie Camera
Modules 20 MP, f/2.2, 26mm (wide) 20 MP, f/2.2, (wide)
Features HDR
Video 1080p@30fps 1080p@30fps
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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 Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Bluetooth 5.0, A2DP, LE 5.0, A2DP, LE
Positioning GPS, GLONASS, GALILEO, BDS GPS, GLONASS, GALILEO, BDS
NFC Yes (market/region dependent) Yes (market/region dependent)
Infrared port No No
Radio FM radio, RDS, recording FM radio, RDS, recording
USB USB Type-C 2.0 USB Type-C 2.0, OTG
Features
Sensors Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass Fingerprint (under display, optical), accelerometer, gyro, compass
  Virtual proximity sensing
Battery
Type Li-Po 6000 mAh Li-Po 5000 mAh
Charging 15W wired 15W wired
Misc
Colors Midnight Blue, Raven Black Prism Crush Black, Prism Crush Blue, Prism Crush Red, Prism Crush White
SAR 0.47 W/kg (head)    
SAR EU 0.49 W/kg (head)     1.68 W/kg (body)    
Models SM-M215F, SM-M215F/DS, SM-M215F/DSN SM-A315F, SM-A315F/DS, SM-A315G/DS, SM-A315G, SM-A315N
Price About 190 EUR £ 139.99 / € 239.99
Tests
Performance AnTuTu: 151815 (v8)
GeekBench: 5096 (v4.4), 1216 (v5.1)
GFXBench: 7fps (ES 3.1 onscreen)
Display 635 nits max brightness (measured)
Loudspeaker -30.9 LUFS (Below average)
Battery (old) Endurance rating 124h

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