Product
Oppo A31
Oppo A31
₹6,669
Samsung Galaxy A21
Samsung Galaxy A21
₹6,823
Battery
Charging - 15W wired
Type Li-Po 4230 mAh Li-Po 4000 mAh
Body
Build Glass front (Gorilla Glass 3), plastic back, plastic frame Glass front, plastic back, plastic frame
Dimensions 163.9 x 75.5 x 8.3 mm (6.45 x 2.97 x 0.33 in) 167.8 x 76.7 x 8.1 mm (6.61 x 3.02 x 0.32 in)
SIM Nano-SIM + Nano-SIM Nano-SIMNano-SIM + Nano-SIM
Weight 180 g (6.35 oz) 193 g (6.81 oz)
Comms
Bluetooth 5.0, A2DP, LE 5.0, A2DP, LE
NFC No Yes (market/region dependent)
Positioning GPS, GLONASS, BDS GPS, GLONASS, BDS
Radio FM radio FM radio
USB microUSB 2.0, OTG USB Type-C 2.0
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
Display
Protection Corning Gorilla Glass 3 -
Resolution 720 x 1600 pixels, 20:9 ratio (~270 ppi density) 720 x 1600 pixels, 20:9 ratio (~270 ppi density)
Size 6.5 inches, 102.0 cm2 (~82.4% screen-to-body ratio) 6.5 inches, 102.0 cm2 (~79.3% screen-to-body ratio)
Type IPS LCD, 480 nits (typ) IPS LCD
Features
Sensors Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass
Launch
Announced 2020, February 13 2020, April 08
Status Available. Released 2020, February 14 Available. Released 2020, June 26
Main Camera
Features LED flash, HDR, panorama LED flash, panorama, HDR
Quad - 16 MP, f/1.8, (wide), 1/3.06", 1.0µm, PDAF 8 MP, f/2.2, (ultrawide), 1/4.0", 1.12µm 2 MP, f/2.4, (macro) 2 MP, f/2.4, (depth)
Triple 12 MP, f/1.8, (wide), 1/2.86", 1.25µm, PDAF 2 MP, f/2.4, (macro) 2 MP, f/2.4, (depth) -
Video 1080p@30fps 1080p@30fps
Memory
Card slot microSDXC (dedicated slot) microSDXC (dedicated slot)
Internal 64GB 4GB RAM, 128GB 4GB RAM, 128GB 6GB RAM 32GB 3GB RAM
  eMMC 5.1 eMMC 5.1
Misc
Colors Fantasy White, Mystery Black, Lake Green Black
Models CPH2015, CPH2073, CPH2081, CPH2029, CPH2031 SM-A215U, SM-A215U1, SM-S215DL, SM-A215W
SAR - 1.27 W/kg (head)     0.60 W/kg (body)    
Network
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 900 / 2100 - International HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - USA
4G bands 1, 3, 5, 7, 8, 20, 28, 38, 40, 41 - International 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 25, 26, 28, 38, 39, 40, 41, 66, 71 - USA
Speed HSPA, LTE HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps
Technology GSM / HSPA / LTE GSM / CDMA / HSPA / EVDO / LTE
  1, 3, 5, 7, 8, 38, 40, 41 - Asia CDMA2000 1xEV-DO
Platform
Chipset Mediatek MT6765V/CB Helio P35 (12 nm) Mediatek MT6765 Helio P35 (12 nm)
CPU Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53) Octa-core (4x2.35 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53)
GPU PowerVR GE8320 PowerVR GE8320
OS Android 9.0 (Pie), ColorOS 6.1 Android 10, One UI 2.0
Selfie camera
Features HDR -
Single 8 MP, f/2.0, (wide), 1/4.0", 1.12µm 13 MP, f/2.0, (wide), 1/3.1", 1.12µm
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes
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