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The vivo Y400 5G is the better fit if you want a sharper AMOLED display, a higher-resolution selfie camera, or faster rated charging. The vivo Y31 5G lists a larger typical battery and expandable storage. On vivo India’s store on October 4, 2026, the Y400 8GB/128GB listing was ₹31,999; the Y31 6GB/128GB listing was ₹27,999 but unavailable. Those are different RAM configurations, so the ₹4,000 gap is not a like-for-like price comparison.
vivo Y400 5G vs vivo Y31 5G at a glance
| Specification | vivo Y400 5G | vivo Y31 5G |
|---|---|---|
| Processor | Snapdragon 4 Gen 2 | Snapdragon 4 Gen 2 |
| Display | 6.67-inch AMOLED, 2400 × 1080, up to 120Hz | 6.68-inch LCD, 1608 × 720; vivo’s comparison result lists 120Hz |
| Battery | 6000mAh typical; 5880mAh rated | 6500mAh typical; 6355mAh rated |
| Charging | Up to 90W | 44W FlashCharge |
| Rear cameras | 50MP + 2MP | 50MP + 0.08MP |
| Front camera | 32MP | 8MP |
| RAM and storage options listed | 8GB RAM; 128GB or 256GB storage | 4GB or 6GB RAM; 128GB or 256GB storage |
| SIM and memory card | Two nano-SIM slots | One nano-SIM and one hybrid nano-SIM/microSD slot |
| Durability rating | IP68/IP69 | IP68/IP69 |
These are manufacturer-published specifications for the India models, not results from independent performance, camera, battery-life, or charging tests. The Y31 refresh-rate figure comes from vivo’s comparison result; that result is labeled Y31t 5G, not Y31 5G, so confirm the exact model’s specification before treating 120Hz as settled.
Which phone has the better display?
The Y400 has the more capable display on paper. Both screens are almost the same diagonal size, but the Y400 uses an AMOLED panel with a stated 2400 × 1080 resolution. The Y31 uses an LCD panel at 1608 × 720. That gives the Y400 a clear advantage in stated resolution and panel type; the listed dimensions do not establish how either screen looks in everyday use.
Battery capacity versus charging speed
The Y31 lists the larger battery: 6500mAh typical, compared with the Y400’s 6000mAh typical. The Y400, in turn, supports up to 90W charging, while the Y31 lists 44W FlashCharge. These are vivo’s published capacities and rated charging figures, not evidence of a specific screen-on time or charging duration. Real battery life and charging speed depend on use and conditions.
#1 Best Overall
![Lucyliy Compatible with vivo Y400 5G /4g Phone Case [Shockproof Design][Magnetic Stand, Sliding Window for Lens] Black](https://m.media-amazon.com/images/I/41Pcn7ixvBL._SL160_.jpg)
- Dual-layer hard PC + Flexible TPU bumper design. Protect your phone from drops, scratches and bumps. Military-Grade protection with Air-Cushion technology precisely compatible with your device
- [Multifunction] Metal kickstand can rotate 360°, easy to rotate and sturdy on the case
- There is a push window design at the camera, which can effectively protect the camera of the phone.Built in kickstand gives you the convenience to watch videos and movies hands-free with desired and stability
- [Support Magnetic Car Mount] There is a built-in metal patch that can easily attach your phone directly to the magnetic car mount (Magnetic car mount not included)
- Precise cutouts for improved access to all ports, buttons, cameras, speakers, and mics ensure quick access and feedback to your phone.
Camera specifications: more front-camera pixels on Y400
Both phones list a 50MP main rear camera. Their secondary rear cameras differ in stated resolution—2MP on the Y400 and 0.08MP on the Y31—and the Y400 lists a 32MP front camera versus 8MP on the Y31. Megapixel counts alone do not establish photo quality, so these figures cannot determine which phone takes better pictures.
Storage, SIMs, and microSD
The Y31 has a hybrid tray: its second slot accepts either a nano-SIM or a microSD card, according to vivo’s dedicated Y31 5G specification page. The Y400 lists two nano-SIM slots and no microSD support in the cited specifications. Consider the Y31 if removable storage matters, and check the exact RAM and storage configuration before buying: vivo lists different combinations for the two models.
Rank #2
- Compatible with Vivo Y400 5G Phone Cases
- The phone case features a matte PU leather exterior with a TPU frame and magnetic plate, offering skin-friendly, slim, and comfortable materials.
- The screen edges and camera frame are fully wrapped with elevated protection to effectively prevent scratches. It withstands minor drops, bumps, and impacts.
- Soft-padded edges provide a comfortable grip and resist deformation. Built-in magnetic plate enables use with car mounts and other accessories.
- Stylish appearance meets precise cutouts, allowing full access to all ports and the camera. Buttons offer soft, responsive tactile feedback for effortless operation.
India price difference and availability
On October 4, 2026, vivo India’s e-store displayed the Y400 5G at ₹31,999 for 8GB/128GB and the Y31 5G at ₹27,999 for 6GB/128GB. The displayed difference is ₹4,000, but the RAM configurations differ and the Y31 listing was marked unavailable. vivo also listed the Y400 8GB/256GB at ₹34,999. These are observed store listings, not guaranteed checkout prices; stock, discounts, and prices can change. Check the exact model, memory configuration, and availability on the vivo Y400 5G and vivo Y31 5G pages before ordering.
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Which one should you buy?
Choose the vivo Y400 5G if
- You prefer an AMOLED display with the higher stated resolution.
- You want the higher-rated charging option or a higher-resolution front-camera specification.
- You are comparing available configurations and can confirm the price and stock for the RAM and storage you want.
Consider the vivo Y31 5G if
- You value its larger stated typical battery capacity.
- You need a microSD card slot and are comfortable with a hybrid SIM tray.
- You find the desired configuration in stock at a price that makes sense; the October 4, 2026 listing cited here was unavailable.
Both official India pages specify the Snapdragon 4 Gen 2, so the chipset name alone does not establish a performance winner. The choice is better made around display, charging, storage expansion, and the exact available configuration.
Rank #3
- Compatible with vivo Y400 5G Phone Case Cover
- Magnetic ring design. Compatible with most wireless magnetic products on the market, such as wireless chargers, magnetic car mounts, magnetic batteries, and magnetic wallets.
- The phone case features a dual-layer TPU+PU construction for a comfortable, non-slip feel. Corner airbags provide drop protection to safeguard your device.
- Perforated design enhances airflow for accelerated heat dissipation. Precise cutouts ensure full functionality of all ports, buttons, and cameras.
- Raised edges around the screen and rear camera elevate these components off the surface, effectively protecting them from scratches.
Water resistance and warranty caution
Both models carry IP68/IP69 ratings, but that is not an unrestricted waterproofing promise. vivo’s Y400 guidance permits underwater photography only in fresh water, at no more than 2 metres for no more than 30 minutes per use; the Y31 page gives comparable usage cautions. vivo warns that liquid damage is not covered by warranty. Follow the usage limits on the exact product page and avoid treating the rating as protection against every water exposure.
Quick Recap
Best Value
- Compatible with Vivo Y400 5G
- Robust, fashion case for pretecting your cell phone against scratches, drops, bumps, shock and scratching.
- Slim, form fitting bumper case design with defined edges and smooth finish. Slides easily in and out of pockets.
- Material: Made of PU leather to offer full protection all around the device.
- All the features, buttons and sensitivity of your smartphone are accessible and easily operated with the case installed.
Rank #4
![MTRIEBA Compatible with Vivo Y400 5G Phone Case [with Tempered Glass Screen Protector] [2-in-1 Sliding Window - Kickstand Design] Blue](https://m.media-amazon.com/images/I/41Ib8AaCqKL._SL160_.jpg)
- Includes a high-definition 9H screen protector made from 9H-hardness tempered glass, which effectively resists everyday scuffs, key scratches and accidental knocks, keeping your screen looking as good as new for years to come
- Military-grade drop protection: a hard PC back panel and soft TPU frame combined with shock-absorbing air cushions, plus raised edges to protect the screen and camera lens, providing robust defence against drops, knocks and everyday wear and tear.
- Smooth sliding, secure latching: Precision runners + anti-loosening latches ensure smooth, jam-free sliding and a secure, spring-loaded lock that won’t pop open, making them durable and long-lasting.
- Precise cut-outs, slim and non-slip: Full-featured, precise cut-outs that do not interfere with charging or photography; slim with a textured finish for a non-slip grip, portable and not bulky.
- Innovative 2-in-1 sliding cover and stand: the sliding lens cover doubles as a sturdy folding stand; slide it open to protect against scratches and dust, and close it to instantly transform it into a viewing stand, leaving your hands free for binge-watching or video calls
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
