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- J4 vs Smart HD 2021
BLU J4 vs Infinix Smart HD 2021
What J4 does better (3) and where Smart HD 2021 wins (7) — every spec side by side.
vs
2.7Display2.9
2.2Camera2.3
2.2Battery5.6
2.4Features2.4
Dimensions
Size comparison
J4Smart HD 2021
| J4 | Smart HD 2021 | Difference | |
|---|---|---|---|
| Height | 151 mm | 158.3 mm | −7.3 mm |
| Width | 72.3 mm | 75.2 mm | −2.9 mm |
| Thickness | 10 mm | 9.8 mm | +0.2 mm |
| Weight | 158 g | 195 g | −37 g |
Drawn to the same scale from the official dimensions (front and side).
Why is J4 better than Smart HD 2021?
- Weight158 g vs 195 g+23%
- Pixel density293 ppi vs 282 ppi+4%
- Selfie camera8 MP vs 5 MP+60%
Why is Smart HD 2021 better than J4?
- Battery capacity2,200 mAh vs 5,000 mAh2.3×
- RAM1 GB vs 2 GB2×
- CPU frequency1.3 GHz vs 1.8 GHz+38%
- Max video720p vs 1080p
- Screen size5.5″ vs 6.1″+11%
- Bluetooth4.1 vs 5+22%
- Screen-to-body ratio71.5% vs 76.7%+7%
Specifications
Side by side
| Design | ||
| Weight | 158 g | 195 g |
| Thickness | 10 mm | 9.8 mm |
| Height | 151 mm | 158.3 mm |
| Width | 72.3 mm | 75.2 mm |
| Frame | — | Plastic |
| Back | — | Plastic |
| Colours | Blue, Black, Brown | Topaz Blue, Obsidian Black, Quartz Green |
| Display | ||
| Screen size | 5.5″ | 6.1″ |
| Panel | IPS LCD | IPS LCD |
| OLED panel | No | No |
| Resolution (width) | 720 px | 720 px |
| Resolution (height) | 1,440 px | 1,560 px |
| Pixel density | 293 ppi | 282 ppi |
| Refresh rate | 60 Hz | 60 Hz |
| Peak brightness | — | 500 nits |
| Screen-to-body ratio | 71.5% | 76.7% |
| Performance | ||
| Chipset | Processor clock: 1.30 GHz | Mediatek MT6761D Helio A20 |
| Chip maker | — | MediaTek |
| Process | — | 12 nm |
| CPU cores | 4 | 4 |
| CPU frequency | 1.3 GHz | 1.8 GHz |
| GPU | Mali-400 | PowerVR GE8320 |
| Memory | ||
| RAM | 1 GB | 2 GB |
| Storage (max) | 32 GB | 32 GB |
| Storage (base) | 32 GB | 32 GB |
| Storage type | eMMC 5.1 | eMMC 5.1 |
| Memory card slot | Yes | Yes |
| Camera | ||
| Main camera | 8 MP | 8 MP |
| Main camera aperture | — | f/2 |
| Rear cameras | 1 | 1 |
| Optical stabilisation | No | No |
| Ultra-wide camera | No | No |
| Telephoto camera | No | No |
| Max video | 720p | 1080p |
| Selfie camera | 8 MP | 5 MP |
| 4K selfie video | No | No |
| Battery | ||
| Battery capacity | 2,200 mAh | 5,000 mAh |
| Battery type | Li-Po | — |
| Wireless charging | No | No |
| Connectivity | ||
| 5G | No | No |
| eSIM | No | No |
| Dual SIM | Yes | Yes |
| Wi-Fi standard | Wi-Fi 4 | Wi-Fi 4 |
| Bluetooth | 4.1 | 5 |
| NFC | No | No |
| USB | microUSB 2.0 | microUSB 2.0 |
| Features | ||
| Stereo speakers | No | No |
| 3.5 mm headphone jack | Yes | Yes |
| Fingerprint sensor | — | Rear |
| Sensors | Accelerometer | Fingerprint (rear-mounted), accelerometer, proximity |
| SAR (head) | — | 0.53 W/kg |
| Software | ||
| OS at launch | Android 8.1 Oreo (Go edition) | Android 10 (Go edition) |
| Platform | Android | Android |
| Interface | — | XOS 6.2 |
