| Hardware and OS | Realme C20A | |
| Operating system | Android 10, Realme UI | |
| Processor | Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53) | |
| Chipset | MediaTek MT6765G Helio G35 (12 nm) | |
| Internal memory | 32GB 2GB RAM | |
| External memory | microSDXC (dedicated slot) | |
| GPU | PowerVR GE8320 | |
| Display | Realme C20A | other phones |
| Size | 6.5 inches, 102.0 cm2 | |
| Resolution | 720 x 1600 pixels, 20:9 ratio | |
| Type | IPS LCD, 400 nits (typ) | |
| Main Camera | Realme C20A | other phones |
| Camera | 8 MP, f/2.0, (wide), 1/4.0", 1.12µm, AF | |
| Features | LED flash, HDR, panorama | |
| Video | 1080p@30fps | |
| Selfie camera | Realme C20A | other phones |
| Camera | 5 MP, f/2.2, (wide), 1/5.0", 1.12µm | |
| Features | HDR | |
| Video | 1080p@30fps | |
| Connectivity | Realme C20A | other phones |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | |
| 3G Network | HSDPA 850 / 900 / 2100 | |
| 4G Network | 1, 3, 5, 7, 8, 20, 28, 38, 40, 41 | |
| Bluetooth | 5.0, A2DP | |
| GPS | Yes, with A-GPS, GLONASS, GALILEO, BDS | |
| NFC | No | |
| Speed | HSPA 42.2/5.76 Mbps, LTE | |
| Technology | GSM / HSPA / LTE | |
| USB | microUSB 2.0, USB On-The-Go | |
| WLAN | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot | |
| Multimedia | Realme C20A | other phones |
| 3.5 mm Jack | Yes | |
| Loudspeaker | Yes | |
| Radio | FM radio | |
| Battery | Realme C20A | other phones |
| Type | Li-Po 5000 mAh, non-removable | |
| Charging | Reverse charging | |
| Design | Realme C20A | other phones |
| Body build | Glass front, plastic frame, plastic back | |
| Body | Splash-resistant design | |
| Colors | Iron Grey, Lake Blue | |
| Dimensions | 165.2 x 76.4 x 8.9 mm (6.50 x 3.01 x 0.35 in) | |
| Weight | 190 g (6.70 oz) | |
| SIM | Dual SIM (Nano-SIM, dual stand-by) | |
| Features | Realme C20A | other phones |
| Sensors | Accelerometer, proximity, compass | |
