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Specifications
 

Samsung Galaxy A31

Samsung Galaxy A51

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Samsung Galaxy A31
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Samsung Galaxy A31

Samsung Galaxy A51

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 (dual-SIM model only)
3G Network HSDPA 850 / 900 / 1900 / 2100 - SM-A315F HSDPA 850 / 900 / 1900 / 2100
  HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - SM-A315G HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G Network 1, 2, 3, 5, 7, 8, 20, 38, 40, 41 - SM-A315F 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 26, 28, 38, 40, 41, 66
  1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 28, 38, 40, 41, 66 - SM-A315G 2, 4, 5, 12, 13, 25, 26, 41, 66, 71 - SM-A515U
Speed HSPA, LTE HSPA, LTE
Launch
Announced 2020, March 24 2019, December 12
Status Available. Released 2020, April 27 Available. Released 2019, December 16
Body
Dimensions 159.3 x 73.1 x 8.6 mm (6.27 x 2.88 x 0.34 in) 158.5 x 73.6 x 7.9 mm (6.24 x 2.90 x 0.31 in)
3D size compare
Weight 185 g (6.53 oz) 172 g (6.07 oz)
Build Glass front (Gorilla Glass 3), plastic back, plastic frame
SIM Single SIM (Nano-SIM) or Dual SIM (Nano-SIM, dual stand-by) Single SIM (Nano-SIM) or Dual SIM (Nano-SIM, dual stand-by)
Display
Type Super AMOLED Super AMOLED
Size 6.4 inches, 98.9 cm2 (~84.9% screen-to-body ratio) 6.5 inches, 102.0 cm2 (~87.4% screen-to-body ratio)
Resolution 1080 x 2400 pixels, 20:9 ratio (~411 ppi density) 1080 x 2400 pixels, 20:9 ratio (~405 ppi density)
Protection Corning Gorilla Glass 3
Platform
OS Android 10, One UI 2.5 Android 10, upgradable to Android 13, One UI 5
Chipset Mediatek MT6768 Helio P65 (12nm) Exynos 9611 (10nm)
CPU Octa-core (2x2.0 GHz Cortex-A75 & 6x1.7 GHz Cortex-A55) Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53)
GPU Mali-G52 MC2 Mali-G72 MP3
Memory
Card slot microSDXC (dedicated slot) microSDXC (dedicated slot)
Internal 64GB 4GB RAM, 128GB 4GB RAM, 128GB 6GB RAM, 128GB 8GB RAM 64GB 4GB RAM, 128GB 4GB RAM, 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM
 eMMC 5.1 UFS 2.0
Main Camera
Modules 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)
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)
Features LED flash, panorama, HDR LED flash, panorama, HDR
Video 1080p@30fps 4K@30fps, 1080p@30/120fps; gyro-EIS
Selfie Camera
Modules 20 MP, f/2.2, (wide) 32 MP, f/2.2, 26mm (wide), 1/2.8", 0.8µm
Features HDR
Video 1080p@30fps 4K@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
Infrared port No No
Radio FM radio, RDS, recording FM radio
USB USB Type-C 2.0, OTG USB Type-C 2.0, OTG
Features
Sensors Fingerprint (under display, optical), accelerometer, gyro, compass Fingerprint (under display, optical), accelerometer, gyro, compass
 Virtual proximity sensing Virtual proximity sensing
ANT+
Battery
Type Li-Po 5000 mAh, non-removable Li-Po 4000 mAh, non-removable
Charging 15W wired 15W wired
Misc
Colors Prism Crush Black, Prism Crush Blue, Prism Crush Red, Prism Crush White Prism Crush Black, Prism Crush White, Prism Crush Blue, Prism Crush Pink
SAR 0.80 W/kg (head)     0.67 W/kg (body)    
SAR EU 0.49 W/kg (head)     1.68 W/kg (body)     0.37 W/kg (head)     1.59 W/kg (body)    
Models SM-A315F, SM-A315F/DS, SM-A315G/DS, SM-A315G, SM-A315N SM-A515F, SM-A515F/DSN, SM-A515F/DS, SM-A515F/DST, SM-A515F/DSM, SM-A515F/N, SM-A515U, SM-A515U1, SM-A515W, SM-A515X, SM-S515DL
Price $ 191.75 / £ 139.99 / € 171.77 / ₹ 12,004 $ 137.00 / C$ 188.99 / £ 116.95 / € 109.17
Tests
Performance AnTuTu: 151815 (v8)
GeekBench: 5096 (v4.4), 1216 (v5.1)
GFXBench: 7fps (ES 3.1 onscreen)
AnTuTu: 113051 (v7), 175363 (v8)
GeekBench: 5401 (v4.4), 1294 (v5.1)
GFXBench: 5.6fps (ES 3.1 onscreen)
Display Contrast ratio: Infinite (nominal) Contrast ratio: Infinite (nominal)
Camera Compare PHOTO / Compare VIDEO
Loudspeaker -30.9 LUFS (Below average) -28.6 LUFS (Average)
Audio quality Noise -93.1dB / Crosstalk -87.3dB
Battery (old) Endurance rating 124h Endurance rating 86h

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