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| Spec | Vivo Y31d Vivo | Vivo X100 Ultra Vivo |
|---|---|---|
| AI Engine | — | Qualcomm AI Engine |
| Always-On Display | No | Yes |
| Audio | — | Hi-Res Audio |
| Audio Boost | 400% | — |
| Audio Jack | No | No |
| Battery | 7200mAh | 5500mAh |
| Battery Type | BlueVolt Battery | Silicon Carbon |
| Bluetooth | 5.1 | 5.4 |
| Build | Composite Plastic Back | Glass Back |
| Bypass Charging | Yes | — |
| Charging | 44W FlashCharge | 80W FlashCharge |
| Chipset | Snapdragon 6s Gen 2 | Snapdragon 8 Gen 3 |
| Colors | Feather Gold, Starlight Grey | Titanium, White, Black |
| CPU | Octa-core | Octa-core |
| Depth Camera | 2MP | — |
| Dimensions | 166.64 x 78.43 x 8.39 mm | 164.1 x 75.6 x 9.2 mm |
| Display | 6.75-inch LCD | 6.78-inch LTPO AMOLED |
| Display Type | IPS LCD | ZEISS Master Display |
| Face Unlock | Yes | Yes |
| Fingerprint | Side Mounted | Ultrasonic Under Display |
| Frame | Plastic | Aluminum |
| Front Camera | 8MP | 50MP |
| GPS | GPS, GLONASS, GALILEO, BDS | GPS, GLONASS, GALILEO, BDS, NavIC |
| GPU | Adreno 610 | Adreno 750 |
| HDR | — | HDR10+, Dolby Vision |
| Infrared Port | Yes | Yes |
| Main Camera | 50MP | 50MP 1-inch Sony LYT-900 OIS |
| Memory Card | No | No |
| Network | 2G,3G,4G | 2G,3G,4G,5G |
| NFC | No | Yes |
| OS | Android 16 | Android 14 |
| Peak Brightness | 1250 nits | 3000 nits |
| Periscope Camera | — | 200MP ZEISS APO Telephoto |
| Pixel Density | 256 ppi | 517 ppi |
| Protection | Scratch Resistant Glass | Armor Glass |
| RAM | 6GB / 8GB | 12GB / 16GB |
| RAM Type | LPDDR4X | LPDDR5X |
| Rear Camera | 50MP + 2MP | 50MP + 50MP + 200MP |
| Refresh Rate | 120Hz | 1-120Hz |
| Release Date | 2026 | May 2024 |
| Resolution | 1570 x 720 | 1440 x 3200 |
| Reverse Charging | Yes | Yes |
| SIM | Dual Nano SIM | Dual Nano SIM |
| Speakers | Dual Stereo Speakers | Stereo Speakers |
| Status | Available | Available |
| Storage | 128GB / 256GB | 256GB / 512GB / 1TB |
| Storage Type | UFS 2.2 | UFS 4.0 |
| Touch Sampling Rate | 240Hz | 300Hz |
| UI | OriginOS 6 | OriginOS 4 |
| Ultra Wide Camera | — | 50MP |
| USB | USB Type-C 2.0 | USB Type-C 3.2 |
| Video Recording | 1080p 30fps | 8K, 4K 120fps |
| Water Resistance | IP68/IP69/IP69+ | IP68/IP69 |
| Weight | 219g | 229g |
| Wi-Fi | Dual Band Wi-Fi | Wi-Fi 7 |
| Wireless Charging | No | 30W |