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Oppo A31
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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 / 1700(AWS) / 1900 / 2100 HSDPA 850 / 900 / 2100 - International
  HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - USA
4G Network 1, 2, 3, 4, 5, 7, 8, 20, 28, 38, 40, 41 1, 3, 5, 7, 8, 20, 28, 38, 40, 41 - International
  1, 2, 3, 4, 5, 7, 8, 28, 38, 41, 66 - USA
  1, 3, 5, 8, 38, 40, 41 - India
  1, 3, 5, 7, 8, 38, 40, 41 - Asia
Speed HSPA, LTE HSPA, LTE
Launch
Announced 2020, April 30 2020, February 13
Status Available. Released 2020, May 12 Available. Released 2020, February 14
Body
Dimensions 162.3 x 77.2 x 8.9 mm (6.39 x 3.04 x 0.35 in) 163.9 x 75.5 x 8.3 mm (6.45 x 2.97 x 0.33 in)
3D size compare
Weight 199 g (7.02 oz) 180 g (6.35 oz)
Build Glass front (Gorilla Glass 5), plastic frame, plastic back Glass front (Gorilla Glass 3), plastic back, plastic frame
SIM Nano-SIM + Nano-SIM Nano-SIM + Nano-SIM
 Water-repellent coating
Display
Type IPS LCD, 450 nits (typ) IPS LCD, 480 nits (typ)
Size 6.53 inches, 104.7 cm2 (~83.5% screen-to-body ratio) 6.5 inches, 102.0 cm2 (~82.4% screen-to-body ratio)
Resolution 1080 x 2340 pixels, 19.5:9 ratio (~395 ppi density) 720 x 1600 pixels, 20:9 ratio (~270 ppi density)
Protection Corning Gorilla Glass 5 Corning Gorilla Glass 3
Platform
OS Android 10, upgradable to Android 11, MIUI 12.5 E Android 9.0 (Pie), ColorOS 6.1
Chipset Mediatek MT6769Z Helio G85 (12 nm) Mediatek MT6765V/CB Helio P35 (12 nm)
CPU Octa-core (2x2.0 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55) Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53)
GPU Mali-G52 MC2 PowerVR GE8320
Memory
Card slot microSDXC (dedicated slot) microSDXC (dedicated slot)
Internal 64GB 3GB RAM, 64GB 4GB RAM, 128GB 4GB RAM, 128GB 6GB RAM 64GB 4GB RAM, 128GB 4GB RAM, 128GB 6GB RAM
  eMMC 5.1
Main Camera
Modules 48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF
8 MP, f/2.2, 118˚ (ultrawide), 1/4.0", 1.12µm
2 MP, f/2.4, (macro), AF
2 MP, f/2.4, (depth)		 12 MP, f/1.8, (wide), 1/2.86", 1.25µm, PDAF
2 MP, f/2.4, (macro)
2 MP, f/2.4, (depth)
Features LED flash, HDR, panorama LED flash, HDR, panorama
Video 1080p@30fps 1080p@30fps
Selfie Camera
Modules 13 MP, f/2.3, 29mm (standard), 1/3.1", 1.12µm 8 MP, f/2.0, (wide), 1/4.0", 1.12µm
Features HDR, panorama 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, BDS
NFC Yes (market/region dependent)
M2003J15SG (Yes); M2003J15SS (No)		 No
Infrared port Yes No
Radio FM radio, built-in antenna FM radio
USB USB Type-C 2.0 microUSB 2.0, OTG
Features
Sensors Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass
Battery
Type Li-Po 5020 mAh Li-Po 4230 mAh
Charging 18W wired
9W reverse wired
Misc
Colors Forest Green, Midnight Grey, Polar White Fantasy White, Mystery Black, Lake Green
SAR 0.84 W/kg (head)     0.90 W/kg (body)    
SAR EU 0.80 W/kg (head)     1.14 W/kg (body)    
Models M2003J15SC, M2003J15SG, M2003J15SS CPH2015, CPH2073, CPH2081, CPH2029, CPH2031
Price $ 85.50 / £ 107.98 / € 84.99 / ₹ 8,999 $ 72.95
Tests
Performance AnTuTu: 200414 (v8)
GeekBench: 1292 (v5.1)
Display 1242:1 contrast ratio, 370 nits max brightness (measured)
Loudspeaker -30.1 LUFS (Below average)
Battery (old) Endurance rating 125h

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