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- A9 Pro 2021 vs Y51a
Umidigi A9 Pro 2021 vs Vivo Y51a
What A9 Pro 2021 does better (1) and where Y51a wins (9) — every spec side by side.
vs
4.1Display4.6
6.3Camera6.5
2.6Battery4.6
4.4Features3.9
Dimensions
Size comparison
A9 Pro 2021Y51a
| A9 Pro 2021 | Y51a | Difference | |
|---|---|---|---|
| Height | 158.7 mm | 163.9 mm | −5.2 mm |
| Width | 74.9 mm | 75.3 mm | −0.4 mm |
| Thickness | 8.6 mm | 8.4 mm | +0.2 mm |
| Weight | 205 g | 188 g | +17 g |
Drawn to the same scale from the official dimensions (front and side).
Why is A9 Pro 2021 better than Y51a?
- Selfie camera24 MP vs 16 MP+50%
Why is Y51a better than A9 Pro 2021?
- Wired charging10 W vs 18 W+80%
- Battery capacity4,150 mAh vs 5,000 mAh+20%
- Max video1080p vs 4K
- Weight205 g vs 188 g+9%
- Screen size6.3″ vs 6.6″+4%
- Bluetooth4.2 vs 5+19%
- Process12 nm vs 11 nm+9%
- Screen-to-body ratio82% vs 84.5%+3%
- Thickness8.6 mm vs 8.4 mm+2%
Specifications
Side by side
| Design | ||
| Weight | 205 g | 188 g |
| Thickness | 8.6 mm | 8.4 mm |
| Height | 158.7 mm | 163.9 mm |
| Width | 74.9 mm | 75.3 mm |
| Frame | Aluminium | — |
| Ingress protection | IP68 | — |
| Water resistance (IPx) | IPx8 | — |
| Glass protection | Corning Gorilla Glass | — |
| Colours | Onyx Black, Forest Green | Titanium Sapphire, Crystal Symphony |
| Display | ||
| Screen size | 6.3″ | 6.6″ |
| Panel | IPS LCD | IPS LCD |
| OLED panel | No | No |
| Resolution (width) | 1,080 px | 1,080 px |
| Resolution (height) | 2,340 px | 2,408 px |
| Pixel density | 409 ppi | 401 ppi |
| Refresh rate | 60 Hz | 60 Hz |
| Screen-to-body ratio | 82% | 84.5% |
| Performance | ||
| Chipset | Mediatek Helio P60 | Qualcomm SM6115 Snapdragon 662 |
| Chip maker | MediaTek | Qualcomm |
| Process | 12 nm | 11 nm |
| CPU cores | 8 | 8 |
| CPU frequency | 2 GHz | 2 GHz |
| GPU | Mali-G72 MP3 | Adreno 610 |
| Memory | ||
| RAM | 8 GB | 8 GB |
| Storage (max) | 128 GB | 128 GB |
| Storage (base) | 128 GB | 128 GB |
| Storage type | UFS 2.1 | — |
| Memory card slot | Yes | Yes |
| Camera | ||
| Main camera | 48 MP | 48 MP |
| Main camera aperture | f/1.8 | f/1.8 |
| Main sensor size | 1/2.0" | 1/2.0" |
| Rear cameras | 2 | 2 |
| Optical stabilisation | No | No |
| Ultra-wide camera | Yes | Yes |
| Telephoto camera | No | No |
| Max video | 1080p | 4K |
| 4K video frame rate | — | 30 fps |
| Selfie camera | 24 MP | 16 MP |
| 4K selfie video | No | No |
| Battery | ||
| Battery capacity | 4,150 mAh | 5,000 mAh |
| Wired charging | 10 W | 18 W |
| Wireless charging | No | No |
| Connectivity | ||
| 5G | No | — |
| eSIM | No | No |
| Dual SIM | Yes | Yes |
| Wi-Fi standard | Wi-Fi 5 | Wi-Fi 5 |
| Bluetooth | 4.2 | 5 |
| NFC | No | No |
| USB | USB Type-C | USB Type-C 2.0 |
| USB version | — | 2 |
| Satellite navigation | GLONASS, GALILEO | GLONASS, GALILEO, BDS |
| Features | ||
| Stereo speakers | No | No |
| 3.5 mm headphone jack | Yes | Yes |
| Fingerprint sensor | Rear | Side |
| Sensors | Fingerprint (rear-mounted), accelerometer, proximity, compass, thermometer (skin temperature) | Fingerprint (side-mounted), accelerometer, gyro, proximity, compass |
| SAR (head) | — | 0.87 W/kg |
| Software | ||
| OS at launch | Android 11 | Android 11 |
| Platform | Android | Android |
| Interface | — | Funtouch 12 |
