Vivo Y31 5G vs Vivo S1 comparison
        
        
            
                
                    
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                    | key specs | 
| Display | 6.68-inch | 6.38-inch | 
| Processor | Qualcomm Snapdragon 4 Gen 2 | MediaTek Helio P65 | 
| Front Camera | 8-megapixel | 32-megapixel | 
| Rear Camera | 50-megapixel + 0.08-megapixel | 16-megapixel + 8-megapixel + 5-megapixel | 
| RAM | 4GB, 6GB | 4GB | 
| Storage | 128GB | 128GB | 
| Battery Capacity | 6,500mAh | 4500mAh | 
| OS | Android 15 | Android Pie | 
| Resolution | 1,608x720 pixels | 1080x2340 pixels | 
| general | 
| Brand | Vivo | Vivo | 
| Model | Y31 5G | S1 | 
| Release date | September 15, 2025 | July 1, 2019 | 
| Launched in India | Yes | Yes | 
| Form factor | Touchscreen | Touchscreen | 
| Body type | Plastic | - | 
| Dimensions (mm) | 166.14 x 77.01 x 8.39 | 159.53 x 75.23 x 8.13 | 
| Weight (g) | 209.00 | 179.00 | 
| IP rating | IP68 | - | 
| Battery capacity (mAh) | 6,500 | 4500 | 
| Removable battery | No | No | 
| Fast charging | 44W Flash Charge | Proprietary | 
| Wireless charging | No | No | 
| Colours | Rose Red and Diamond Green | Skyline Blue, Diamond Black | 
| display | 
| Refresh Rate | 120 Hz | - | 
| Screen size (inches) | 6.68 | 6.38 | 
| Touchscreen | Yes | Yes | 
| Resolution | 1,608x720 pixels | 1080x2340 pixels | 
| Pixels per inch (PPI) | 264 | - | 
| Aspect ratio | - | 19.5:9 | 
| hardware | 
| Processor | 2.2GHz MHz octa-core | octa-core | 
| Processor make | Qualcomm Snapdragon 4 Gen 2 | MediaTek Helio P65 (MT6768) | 
| RAM | 4GB, 6GB | 4GB | 
| Internal storage | 128GB | 128GB | 
| Expandable storage | Yes | No | 
| Expandable storage type | microSD | - | 
| Expandable storage up to (GB) | 2TB | - | 
| Dedicated microSD slot | - | No | 
| camera | 
| Rear camera | 50-megapixel (f/f/1.8) + 0.08-megapixel (f/f/3.0) | 16-megapixel (f/1.78) + 8-megapixel (f/2.2) + 5-megapixel (f/2.4) | 
| No. of Rear Cameras | 2 | - | 
| Rear flash | Yes | - | 
| Front camera | 8-megapixel (f/f/2.0) | 32-megapixel (f/2.0) | 
| No. of Front Cameras | 1 | - | 
| Pop-Up Camera | No | - | 
| software | 
| Operating system | Android 15 | Android Pie | 
| Skin | Funtouch OS 15 | Funtouch OS 9 | 
| connectivity | 
| Wi-Fi | Yes | Yes | 
| GPS | Yes | Yes | 
| Bluetooth | Yes, v 4.20 | Yes, v 5.00 | 
| NFC | No | - | 
| USB Type-C | Yes | - | 
| Number of SIMs | 2 | 2 | 
| USB OTG | - | Yes | 
| sim 1 | 
| SIM Type | Nano-SIM | Nano-SIM | 
| GSM/CDMA | GSM | - | 
| 4G/ LTE | Yes | - | 
| 5G | Yes | - | 
| sim 2 | 
| SIM Type | Nano-SIM | Nano-SIM | 
| GSM/CDMA | GSM | - | 
| 4G/ LTE | Yes | - | 
| 5G | Yes | - | 
| sensors | 
| Fingerprint sensor | Yes | Yes | 
| Compass/ Magnetometer | Yes | Yes | 
| Proximity sensor | Yes | Yes | 
| Accelerometer | Yes | Yes | 
| Ambient light sensor | Yes | Yes | 
| Gyroscope | No | Yes | 
| Barometer | No | - | 
| Temperature sensor | No | - | 
| ratings | 
| Overall NDTV Rating | - | Read Review | 
| Design Rating | - |  | 
| Display Rating | - |  | 
| Software Rating | - |  | 
| Performance Rating | - |  | 
| Battery Life Rating | - |  | 
| Camera Rating | - |  | 
| Value for Money Rating | - |  |