| Hardware and OS OPPO F21 |
| Operating system: | Android 10, ColorOS 7.2 |
| Processor: | Octa-core (2x2.0 GHz Cortex-A76, 6x2.0 GHz Cortex-A55) |
| GPU: | Adreno 610 |
| RAM: | 8 GB |
| Internal Storage: | 128 GB |
| Memory Card Slot: | microSDXC (dedicated slot) |
| User Interface: | Yes with Modified Android |
| Display OPPO F21 |
| Type: | IPS LCD |
| Size: | 6.5 inches |
| Resolution: | 1080 x 2400 pixels |
| Colors: | 16M Colors |
| Pixel Density: | ~ 405 ppi |
| Touchscreen: | Yes Multi Touch Support |
| Connectivity OPPO F21 |
| 4G Network: | 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 38, 39, 40, 41, 66 |
| 5G Network: | 1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 77, 78 SA/NSA |
| Wi-Fi: | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot |
| GPS: | Yes, with A-GPS, GLONASS, GALILEO, BDS |
| NFC: | Yes |
| USB: | USB Type-C 2.0, USB On-The-Go |
| Speed: | HSPA 42.2/5.76 Mbps, LTE-A |
| SIM: | Nano SIM |
| Dual SIM: | Dual SIM (Nano-SIM, dual stand-by) |
| Wireless Charging: | No |
| Camera OPPO F21 |
| Main camera: | 16 MP (wide), 8 MP (ultrawide), 2 MP (depth) |
| Features: | LED flash, HDR, panorama |
| Image: | 1080p |
| Selfie camera: | 8 MP (wide) |
| Multimedia OPPO F21 |
| Loudspeaker: | Yes |
| Handsfree: | Yes |
| Radio: | Yes |
| Video Playback: | Yes |
| Video Out: | Yes |
| Ring Tones: | Yes |
| 3.5 mm Jack: | Yes |
| Design OPPO F21 |
| Dimensions: | 162.2 x 75 x 7.9 mm |
| Waterproof: | No |
| Weight: | 177 Grams |
| Battery OPPO F21 |
| Capacity: | Li-Po 4,500 mAh, Fast charging 64W |
| Placement: | Non-Removable |
| Other OPPO F21 |
| Sensors: | Fingerprint (side-mounted), accelerometer, proximity, |
