Product
Oppo A31
Oppo A31
Realme C2s
Realme C2s
Battery
Type Li-Po 4230 mAh 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) 154.3 x 73.7 x 8.5 mm (6.07 x 2.90 x 0.33 in)
SIM Nano-SIM + Nano-SIM Nano-SIM + Nano-SIM
Weight 180 g (6.35 oz) 166 g (5.86 oz)
Comms
Bluetooth 5.0, A2DP, LE 4.2, A2DP, LE
NFC No No
Positioning GPS, GLONASS, BDS GPS, GLONASS, BDS
Radio FM radio FM radio
USB microUSB 2.0, OTG microUSB 2.0, OTG
WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct Wi-Fi 802.11 b/g/n
Display
Protection Corning Gorilla Glass 3 -
Resolution 720 x 1600 pixels, 20:9 ratio (~270 ppi density) 720 x 1560 pixels, 19.5:9 ratio (~282 ppi density)
Size 6.5 inches, 102.0 cm2 (~82.4% screen-to-body ratio) 6.1 inches, 91.3 cm2 (~80.3% screen-to-body ratio)
Type IPS LCD, 480 nits (typ) IPS LCD
Features
Sensors Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass Accelerometer, proximity, compass
Launch
Announced 2020, February 13 2020, January
Status Available. Released 2020, February 14 Available. Released 2020, January
Main Camera
Dual - 13 MP, f/2.2, 1/3.1", 1.12µm, PDAF2 MP, f/2.4, (depth)
Features LED flash, HDR, panorama LED flash, HDR, panorama
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 Diamond Black
Models CPH2015, CPH2073, CPH2081, CPH2029, CPH2031 -
Network
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 900 / 2100 - International HSDPA 850 / 900 / 2100
4G bands 1, 3, 5, 7, 8, 20, 28, 38, 40, 41 - International 1, 3, 5, 8, 38, 40, 41
Speed HSPA, LTE HSPA, LTE
Technology GSM / HSPA / LTE GSM / HSPA / LTE
  1, 3, 5, 7, 8, 38, 40, 41 - Asia -
Platform
Chipset Mediatek MT6765V/CB Helio P35 (12 nm) Mediatek MT6762 Helio P22 (12 nm)
CPU Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53) Octa-core 2.0 GHz Cortex-A53
GPU PowerVR GE8320 PowerVR GE8320
OS Android 9.0 (Pie), ColorOS 6.1 Android 9.0 (Pie), ColorOS 6.1
Selfie camera
Features HDR HDR
Single 8 MP, f/2.0, (wide), 1/4.0", 1.12µm 5 MP, f/2.0, 1/5.0", 1.12µm
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes