| Brand: | Realme |
| Model: | C21 |
| Type: | Smartphone |
| Release Date: | 2021 |
| Size: | 6.5 inches, 102.0 cm2 |
| Resolution: | 720 x 1600 pixels, 20:9 ratio (~270 ppi density) |
| Technology: | IPS LCD, 400 nits (typ) |
| Brightness: | 400 nits |
| Main Specs: | 13 MP, f/2.2, 26mm (wide), 1/3.06", 1.12µm, PDAF 2 MP (macro) Auxiliary lens |
| Main Features: | LED flash, HDR, panorama |
| Main Video: | 1080p@30fps |
| Selfie Specs: | 5 MP, f/2.2, (wide), 1/5.0", 1.12µm |
| Selfie Video: | 1080p@30fps |
| Capacity: | 5000 mAh |
| Charging: | 10W wired Reverse wired |
| Fast Charging: | 10W |
| Chipset: | Mediatek MT6765G Helio G35 (12 nm) |
| Cpu: | Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53) |
| Gpu: | PowerVR GE8320 |
| Ram: | 3GB |
| Storage: | 32GB |
| Expandable: | microSDXC (dedicated slot) |
| Os: | Android 10, Realme UI |
| 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: | Nano-SIM + Nano-SIM |
| Wifi: | Wi-Fi 802.11 b/g/n |
| Bluetooth: | 5.0, A2DP, LE |
| Nfc: | No |
| Usb: | microUSB 2.0, OTG |
| Headphone Jack: | Yes |
| Network: | GSM / HSPA / LTE |
| Sensors: | Fingerprint (rear-mounted), accelerometer, proximity, compass |
| Colors: | Cross Black, Cross Blue |
| Usd: | ~443 USD |
