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- J8 vs K31
Cubot J8 vs LG K31
What J8 does better (3) and where K31 wins (12) — every spec side by side.
Dimensions
Size comparison
J8K31
| J8 | K31 | Difference | |
|---|---|---|---|
| Height | 135 mm | 147.8 mm | −12.8 mm |
| Width | 63 mm | 71.1 mm | −8.1 mm |
| Thickness | 11 mm | 8.6 mm | +2.4 mm |
| Weight | 144 g | 146 g | −2 g |
Drawn to the same scale from the official dimensions (front and side).
Why is J8 better than K31?
- Battery capacity3,100 mAh vs 3,000 mAh+3%
- Selfie camera8 MP vs 5 MP+60%
- Screen-to-body ratio87.2% vs 77.2%+13%
Why is K31 better than J8?
- Storage (max)16 GB vs 32 GB2×
- CPU frequency1.3 GHz vs 2 GHz+54%
- Pixel density192 ppi vs 295 ppi+54%
- Process28 nm vs 12 nm2.3×
- CPU cores4 vs 82×
- Storage (base)16 GB vs 32 GB2×
- Memory card slotNo · J8: Yes
- Ultra-wide cameraNo · J8: Yes
- Screen size5.5″ vs 5.7″+4%
- Resolution (width)442 px vs 720 px+63%
- Thickness11 mm vs 8.6 mm+28%
- Bluetooth4.2 vs 5+19%
Specifications
Side by side
| Design | ||
| Weight | 144 g | 146 g |
| Thickness | 11 mm | 8.6 mm |
| Height | 135 mm | 147.8 mm |
| Width | 63 mm | 71.1 mm |
| Colours | Black, Red, Blue, Green | Gray |
| Display | ||
| Screen size | 5.5″ | 5.7″ |
| Panel | IPS LCD | IPS LCD |
| OLED panel | No | No |
| Resolution (width) | 442 px | 720 px |
| Resolution (height) | 960 px | 1,520 px |
| Pixel density | 192 ppi | 295 ppi |
| Refresh rate | 60 Hz | 60 Hz |
| Screen-to-body ratio | 87.2% | 77.2% |
| Performance | ||
| Chipset | Mediatek MT6580 | Mediatek MT6762 Helio P22 |
| Chip maker | MediaTek | MediaTek |
| Process | 28 nm | 12 nm |
| CPU cores | 4 | 8 |
| CPU frequency | 1.3 GHz | 2 GHz |
| GPU | — | PowerVR GE8320 |
| Memory | ||
| RAM | 2 GB | 2 GB |
| Storage (max) | 16 GB | 32 GB |
| Storage (base) | 16 GB | 32 GB |
| Storage type | — | eMMC 5.1 |
| Memory card slot | No | Yes |
| Camera | ||
| Main camera | 13 MP | 13 MP |
| Main camera aperture | — | f/1.8 |
| Main sensor size | — | 1/3.1" |
| Rear cameras | 2 | 2 |
| Optical stabilisation | No | No |
| Ultra-wide camera | No | Yes |
| Telephoto camera | No | No |
| Max video | — | 1080p |
| Selfie camera | 8 MP | 5 MP |
| 4K selfie video | No | No |
| Battery | ||
| Battery capacity | 3,100 mAh | 3,000 mAh |
| Battery type | — | Li-Ion |
| Wireless charging | — | No |
| Connectivity | ||
| 5G | — | No |
| eSIM | No | No |
| Dual SIM | Yes | Yes |
| Wi-Fi standard | Wi-Fi 4 | Wi-Fi 4 |
| Bluetooth | 4.2 | 5 |
| NFC | No | No |
| USB | Yes | microUSB 2.0 |
| Features | ||
| Stereo speakers | No | No |
| 3.5 mm headphone jack | Yes | Yes |
| Fingerprint sensor | — | Rear |
| Sensors | Accelerometer, proximity | Fingerprint (rear-mounted), accelerometer |
| Software | ||
| OS at launch | Android 10 | Android 10 |
| Platform | Android | Android |
