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Specifications
 

Samsung Galaxy A51

Samsung Galaxy A31

Full Differences
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Samsung Galaxy A51
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Samsung Galaxy A51

Samsung Galaxy A31

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 HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - SM-A315G
4G Network 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 26, 28, 38, 40, 41, 66 1, 2, 3, 5, 7, 8, 20, 38, 40, 41 - SM-A315F
  2, 4, 5, 12, 13, 25, 26, 41, 66, 71 - SM-A515U 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 2019, December 12 2020, March 24
Status Available. Released 2019, December 16 Available. Released 2020, April 27
Body
Dimensions 158.5 x 73.6 x 7.9 mm (6.24 x 2.90 x 0.31 in) 159.3 x 73.1 x 8.6 mm (6.27 x 2.88 x 0.34 in)
3D size compare
Weight 172 g (6.07 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 Super AMOLED
Size 6.5 inches, 102.0 cm2 (~87.4% screen-to-body ratio) 6.4 inches, 98.9 cm2 (~84.9% screen-to-body ratio)
Resolution 1080 x 2400 pixels, 20:9 ratio (~405 ppi density) 1080 x 2400 pixels, 20:9 ratio (~411 ppi density)
Protection Corning Gorilla Glass 3
Platform
OS Android 10, upgradable to Android 13, One UI 5 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 4GB RAM, 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM 64GB 4GB RAM, 128GB 4GB RAM, 128GB 6GB RAM, 128GB 8GB RAM
 UFS 2.0 eMMC 5.1
Main Camera
Modules 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)
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@30/120fps; gyro-EIS 1080p@30fps
Selfie Camera
Modules 32 MP, f/2.2, 26mm (wide), 1/2.8", 0.8µm 20 MP, f/2.2, (wide)
Features HDR
Video 4K@30fps, 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 Yes (market/region dependent)
Infrared port No No
Radio FM radio FM radio, RDS, recording
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
ANT+
Virtual proximity sensing
Battery
Type Li-Po 4000 mAh, non-removable Li-Po 5000 mAh
Charging 15W wired 15W wired
Misc
Colors Prism Crush Black, Prism Crush White, Prism Crush Blue, Prism Crush Pink Prism Crush Black, Prism Crush Blue, Prism Crush Red, Prism Crush White
SAR 0.80 W/kg (head)     0.67 W/kg (body)    
SAR EU 0.37 W/kg (head)     1.59 W/kg (body)     0.49 W/kg (head)     1.68 W/kg (body)    
Models 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 SM-A315F, SM-A315F/DS, SM-A315G/DS, SM-A315G, SM-A315N
Price $ 128.00 / C$ 189.99 / £ 88.51 / € 110.63 / ₹ 11,999 £ 139.99 / € 239.99
Tests
Performance AnTuTu: 113051 (v7), 175363 (v8)
GeekBench: 5401 (v4.4), 1294 (v5.1)
GFXBench: 5.6fps (ES 3.1 onscreen)
AnTuTu: 151815 (v8)
GeekBench: 5096 (v4.4), 1216 (v5.1)
GFXBench: 7fps (ES 3.1 onscreen)
Display 636 nits max brightness (measured) 635 nits max brightness (measured)
Camera Compare PHOTO / Compare VIDEO
Loudspeaker -28.6 LUFS (Average) -30.9 LUFS (Below average)
Audio quality Noise -93.1dB / Crosstalk -87.3dB
Battery (old) Endurance rating 86h Endurance rating 124h

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