Vivo Y31 5G vs Samsung Galaxy J7 Duo comparison
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| key specs |
| Display | 6.68-inch | 5.50-inch |
| Processor | Qualcomm Snapdragon 4 Gen 2 | Samsung Exynos 7885 |
| Front Camera | 8-megapixel | 8-megapixel |
| Rear Camera | 50-megapixel + 0.08-megapixel | 13-megapixel + 5-megapixel |
| RAM | 4GB, 6GB | 4GB |
| Storage | 128GB | 32GB |
| Battery Capacity | 6,500mAh | 3000mAh |
| OS | Android 15 | Android Oreo |
| Resolution | 1,608x720 pixels | 720x1280 pixels |
| general |
| Brand | Vivo | Samsung |
| Model | Y31 5G | Galaxy J7 Duo |
| Release date | September 15, 2025 | March 1, 2018 |
| Launched in India | Yes | Yes |
| Form factor | Touchscreen | Touchscreen |
| Body type | Plastic | - |
| Dimensions (mm) | 166.14 x 77.01 x 8.39 | 153.50 x 77.20 x 8.20 |
| Weight (g) | 209.00 | 174.00 |
| IP rating | IP68 | - |
| Battery capacity (mAh) | 6,500 | 3000 |
| Removable battery | No | - |
| Fast charging | 44W Flash Charge | - |
| Wireless charging | No | - |
| Colours | Rose Red and Diamond Green | Black and Gold |
| display |
| Refresh Rate | 120 Hz | - |
| Screen size (inches) | 6.68 | 5.50 |
| Touchscreen | Yes | Yes |
| Resolution | 1,608x720 pixels | 720x1280 pixels |
| Pixels per inch (PPI) | 264 | 267 |
| Aspect ratio | - | 16:9 |
| hardware |
| Processor | 2.2GHz MHz octa-core | octa-core (2x2.2GHz + 6x1.6GHz) |
| Processor make | Qualcomm Snapdragon 4 Gen 2 | Samsung Exynos 7885 |
| RAM | 4GB, 6GB | 4GB |
| Internal storage | 128GB | 32GB |
| Expandable storage | Yes | Yes |
| Expandable storage type | microSD | microSD |
| Expandable storage up to (GB) | 2TB | 256 |
| camera |
| Rear camera | 50-megapixel (f/f/1.8) + 0.08-megapixel (f/f/3.0) | 13-megapixel (f/1.9) + 5-megapixel (f/1.9) |
| No. of Rear Cameras | 2 | - |
| Rear flash | Yes | LED |
| Front camera | 8-megapixel (f/f/2.0) | 8-megapixel (f/1.9) |
| No. of Front Cameras | 1 | - |
| Pop-Up Camera | No | - |
| Rear autofocus | - | Yes |
| Front flash | - | LED |
| software |
| Operating system | Android 15 | Android Oreo |
| Skin | Funtouch OS 15 | - |
| connectivity |
| Wi-Fi | Yes | Yes |
| GPS | Yes | Yes |
| Bluetooth | Yes, v 4.20 | Yes, v 5.00 |
| NFC | No | No |
| USB Type-C | Yes | - |
| Number of SIMs | 2 | 2 |
| Wi-Fi standards supported | - | 802.11 a/b/g/n/ac |
| FM | - | Yes |
| sim 1 |
| SIM Type | Nano-SIM | - |
| GSM/CDMA | GSM | - |
| 4G/ LTE | Yes | - |
| 5G | Yes | - |
| sim 2 |
| SIM Type | Nano-SIM | - |
| GSM/CDMA | GSM | - |
| 4G/ LTE | Yes | - |
| 5G | Yes | - |
| sensors |
| Fingerprint sensor | Yes | Yes |
| Compass/ Magnetometer | Yes | No |
| Proximity sensor | Yes | Yes |
| Accelerometer | Yes | Yes |
| Ambient light sensor | Yes | - |
| Gyroscope | No | - |
| Barometer | No | - |
| Temperature sensor | No | - |