Oppo Realme C31 vs Realme C21
Here we compared two budget smartphones: the 6.5-inch Oppo Realme C31 (with Unisoc Tiger T612) that was released on March 25, 2022, against the Oppo Realme C21, which is powered by MediaTek Helio G35 and came out 13 months before. On this page, you will find tests, full specs, strengths, and weaknesses of each of the gadgets.
Key differences
Reasons to consider the Oppo Realme C31
- 59% better performance in AnTuTu Benchmark (211K versus 132K)
- The phone is 1-year and 1-month newer
- Faster storage type - UFS 2.2 versus eMMC 5.1
- 2x faster in single-core GeekBench 5 test: 347 and 176 points
Reasons to consider the Oppo Realme C21
- Reverse charging feature
- The front-facing camera can record video at 1080p
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Review
Display
Screen quality, color accuracy, brightness
Performance
CPU/GPU performance in apps and games
Battery
Battery life, charging type and speed
Camera
Photo and video recording quality
Connectivity
Networks, ports, data transmission
NanoReview score
Final comparison evaluation
Value for money
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Tests and specifications
Comparison table of technical specifications and testsDisplay
| Type | IPS LCD | IPS LCD |
| Size | 6.5 inches | 6.5 inches |
| Resolution | 720 x 1600 pixels | 720 x 1600 pixels |
| Aspect ratio | 20:9 | 20:9 |
| PPI | 270 ppi | 270 ppi |
| Refresh rate | 60 Hz | 60 Hz |
| Max rated brightness | 415 nits | 450 nits |
| HDR support | No | No |
| Screen protection | Tempered glass | Tempered glass |
| Screen-to-body ratio | 81.4% | 80.8% |
| PWM | Not detected | - |
| Response time | 48 ms | - |
| Contrast | 1033:1 | - |
Peak brightness test (auto)
Design and build
| Height | 164.7 mm (6.48 inches) | 165.2 mm (6.5 inches) |
| Width | 76.1 mm (3 inches) | 76.4 mm (3.01 inches) |
| Thickness | 8.4 mm (0.33 inches) | 8.9 mm (0.35 inches) |
| Weight | 197 g (6.95 oz) | 190 g (6.7 oz) |
| Waterproof | No | No |
| Rear material | Plastic | Plastic |
| Frame material | Plastic | Plastic |
| Colors | Silver, Green | Black, Blue |
| Fingerprint scanner | Yes, in home button | Yes, rear |
Screen-to-body ratio
Performance
| Chipset | Unisoc Tiger T612 | MediaTek Helio G35 |
| Max. clock | 1800 MHz | 2300 MHz |
| CPU cores | 8 (2 + 6) | 8 (4 + 4) |
| Architecture | - 6 cores at 1.8 GHz: Cortex-A55 - 2 cores at 1.8 GHz: Cortex-A75 |
- 4 cores at 1.8 GHz: Cortex-A53 - 4 cores at 2.3 GHz: Cortex-A53 |
| Lithography process | 12 nanometers | 12 nanometers |
| Graphics | Mali-G57 MP1 | IMG PowerVR GE8320 |
| GPU clock | 614 MHz | 680 MHz |
| FLOPS | - | ~54.4 GFLOPS |
Benchmarks
Geekbench 5 (Single-Core)
Geekbench 5 (Multi-Core)
AnTuTu Benchmark 9
| CPU | 67603 | 39772 |
| GPU | 22171 | 16631 |
| Memory | 61955 | 33664 |
| UX | 58129 | 41494 |
| Total score | 211341 | 132582 |
3DMark Wild Life Performance
| PCMark 3.0 score | 7614 | - |
Memory
| RAM size | 3, 4 GB | 3, 4 GB |
| Memory type | LPDDR4X | LPDDR4X |
| Memory clock | - | 1866 MHz |
| Channels | 2 | 2 |
| Storage size | 32, 64 GB | 32, 64 GB |
| Storage type | UFS 2.2 | eMMC 5.1 |
| Memory card | MicroSD | MicroSD |
| Memory card max. size | Up to 1024 GB | Up to 256 GB |
Software
| Operating system | Android 11 | Android 10 (Can be upgraded to Android 11) |
| ROM | Realme UI 2.0 | Realme UI 2.0 |
Battery
| Capacity | 5000 mAh | 5000 mAh |
| Charge power | 10 W | 10 W |
| Battery type | Li-Po | Li-Po |
| Replaceable | No | No |
| Wireless charging | No | No |
| Reverse charging | No | Yes |
| Fast charging | No | No |
| Full charging time | 2:40 hr | 2:55 hr |
Camera
| Matrix | 13 megapixels | 13 megapixels |
| Image resolution | 4128 x 3096 | 4128 x 3096 |
| Zoom | Digital | Digital |
| Flash | LED | LED |
| Stabilization | Digital | Digital |
| 8K video recording | No | No |
| 4K video recording | No | No |
| 1080p video recording | Up to 30FPS | Up to 30FPS |
| Slow motion | No | No |
| Lenses | 3 (13 MP + 2 MP + 0.3 MP) | 3 (13 MP + 2 MP + 2 MP) |
| Wide (main) lens | - 13 MP - Aperture: f/2.2 - Focal length: 25 mm - Pixel size: 1.12 micron - Sensor: 1/3" (CMOS) - Phase autofocus |
- 13 MP - Aperture: f/2.2 - Focal length: 26 mm - Pixel size: 1.12 micron - Sensor: 1/3" (CMOS) - Phase autofocus |
| Monochrome lens | - | - 2 MP - Aperture: f/2.4 - Pixel size: 1.75 micron - Sensor: 1/5" (CMOS) |
| Macro lens | - 2 MP - Aperture: f/2.4 - Pixel size: 1.75 micron - Sensor: 1/5" (CMOS) |
- 2 MP - Aperture: f/2.4 - Pixel size: 1.75 micron - Sensor: 1/5" (CMOS) |
| Depth lens | - 0.3 MP - Aperture: f/2.8 |
- |
| Camera features | - Bokeh mode | - Bokeh mode |
| Megapixels | 5 megapixels | 5 megapixels |
| Image resolution | 2560 x 1960 | 2560 x 1960 |
| Aperture | f/2.2 | f/2.2 |
| Focal length | 27 mm | 27 mm |
| Pixel size | 1.12 microns | 1.12 microns |
| Sensor type | CMOS | CMOS |
| Sensor size | 1/5" | 1/5" |
| Video resolution | 720p at 30 FPS | 1080p (Full HD) at 30 FPS |
Connectivity
| Wi-Fi standard | Wi-Fi 4 (802.11 b/g/n) | Wi-Fi 4 (802.11 a/b/g/n) |
| Wi-Fi features | - Wi-Fi Direct - Wi-Fi Hotspot |
- Wi-Fi Direct - Wi-Fi Hotspot - Wi-Fi Display |
| Bluetooth version | 5 | 5 |
| Bluetooth features | LE | LE, HID, A2DP |
| USB type | Micro USB | Micro USB |
| USB version | 2 | 2 |
| USB features | - Charging - USB-Storage mode |
- Charging - USB-Storage mode - OTG |
| GPS | GPS, GLONASS, Beidou, Galileo | GPS, GLONASS, Beidou |
| NFC* | No | No |
| Infrared port | No | No |
| Number of SIM* | 2 | 2 |
| Type of SIM card | Nano | Nano |
| Multi SIM mode | Standby | Standby |
| eSIM support* | No | No |
| Hybrid slot | No | No |
| LTE Cat* | - | 7 |
| 5G support | No | No |
Sound
| Speakers | Mono | Mono |
| Headphone audio jack | Yes | Yes |
| FM radio | No | Yes |
| Dolby Atmos | No | No |
Speakers test
Max. loudness
Other
| Category | Budget | Budget |
| Announced | March 2022 | March 2021 |
| Release date | March 2022 | March 2021 |
| Sensors | - Proximity sensor - Gyroscope - Accelerometer - Ambient light sensor - Fingerprint |
- Proximity sensor - Accelerometer - Ambient light sensor - Compass - Fingerprint |
*Disclaimer! NFC, GSM network support, and some other specs can be different depending on the country.
Conclusion
These smartphones have a lot in common, but we would recommend the Oppo Realme C31. It has a better performance, camera, connectivity, design, and sound.
Cast your vote
Total votes: 23