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Full Specifications
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| Technology | GSM / HSPA / LTE |
| 2G bands | GSM 850 / 900 / 1800 / 1900 |
| 3G bands | HSDPA 850 / 900 / 2100 |
| 4G bands | 1, 3, 5, 7, 8, 20, 28, 38, 40, 41 |
| Speed | HSPA, LTE |
Launch
| Announced | 2025, July 28 |
| Status | Available. Released 2025, July 28 |
Body
| Dimensions | 162.3 x 75.3 x 7.9 mm (6.39 x 2.96 x 0.31 in) |
| Weight | 196 g or 198 g (6.91 oz) |
| Build | Glass front, plastic back, plastic frame |
| SIM | Nano-SIM + Nano-SIM |
| Protection | IP68/IP69 dust tight and water resistant (high pressure water jets; immersible up to 2m for 30 min) MIL-STD-810H compliant* * does not guarantee ruggedness or use in extreme conditions |
Display
| Type | AMOLED, 120Hz, 1200 nits (HBM), 1800 nits (peak) |
| Size | 6.67 inches, 107.4 cm2 (~87.9% screen-to-body ratio) |
| Resolution | 1080 x 2400 pixels, 20:9 ratio (~395 ppi density) |
Hardware & Software
| OS | Android 15, Funtouch 15 |
| Chipset | Qualcomm SM6225 Snapdragon 685 (6 nm) |
| CPU | Octa-core (4x2.8 GHz Cortex-A73 & 4x1.9 GHz Cortex-A53) |
| GPU | Adreno 610 |
Memory & Storage
| Card slot | No |
| Internal | 128GB 8GB RAM, 256GB 8GB RAM |
| Storage Type | UFS 2.2 |
Main Camera
| Dual | 50 MP, f/1.8, (wide), 1/2.96", PDAF Auxiliary lens |
| Features | Ring-LED flash, panorama, HDR |
| Video | 1080p@30fps |
Selfie Camera
| Single | 8 MP, f/2.1, (wide) |
| Video | 1080p@30fps |
Sound
| Loudspeaker | Yes, with stereo speakers |
| 3.5mm jack | No |
| Audio Quality | 24-bit/192kHz Hi-Res audio |
Connectivity
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band |
| Bluetooth | 5.0, A2DP, LE |
| Positioning | GPS, GLONASS, GALILEO, BDS, QZSS |
| NFC | Yes (market/region dependent) |
| Radio | No |
| USB | USB Type-C 2.0, OTG |
Features
| Sensors | Fingerprint (under display, optical), accelerometer, gyro, proximity, compass |
Battery
| Type | Si/C Li-Ion 6000 mAh |
| Charging | 44W wired Reverse wired |
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Description
Overview & Display
Vivo vivo Y400 4G has a slim 7.9 mm body with a glass front, plastic back, and plastic frame, keeping its weight between 196 and 198 grams. Its IP68/IP69 rating provides dust-tight protection and resistance to high-pressure water jets, with immersion up to two metres for 30 minutes. The phone also carries MIL-STD-810H compliance, although this does not guarantee ruggedness in extreme conditions. Up front, the 6.67-inch AMOLED display offers a sharp 1080 x 2400 resolution, a smooth 120Hz refresh rate, and brightness reaching 1,800 nits peak. Stereo speakers and 24-bit/192kHz Hi-Res audio support make it suitable for viewing videos and enjoying compatible audio content.
Performance comes from the Snapdragon 685, an octa-core chipset combining four 2.8GHz Cortex-A73 cores with four 1.9GHz Cortex-A53 cores, alongside an Adreno 610 GPU. This configuration is designed for everyday apps, browsing, streaming, and routine multitasking rather than demanding performance-focused use. With 8GB of RAM, Vivo vivo Y400 4G can keep common applications accessible during normal daily use. Storage options include 128GB or 256GB using UFS 2.2, though there is no memory card slot for expansion. Android 15 with Funtouch 15 provides the software foundation, while the under-display optical fingerprint sensor offers convenient device access.
Camera & Battery
The rear camera system combines a 50MP f/1.8 wide camera with an auxiliary lens. PDAF is included to assist focusing, while ring-LED flash, HDR, and panorama modes add flexibility for different shooting situations. Rear video recording reaches 1080p at 30 frames per second, providing a straightforward option for everyday clips. On the front, the 8MP f/2.1 wide selfie camera also records at 1080p and 30fps. The specifications support useful image and video features, although this is a relatively focused camera setup rather than a system built around multiple advanced shooting options.
A 6,000mAh silicon-carbon lithium-ion battery is one of Vivo vivo Y400 4G’s strongest practical features, giving it substantial capacity for daily communication, streaming, browsing, and general app use. Actual endurance will depend on display brightness, network conditions, and usage patterns, but the large battery is well suited to users who prefer fewer charging interruptions. When power is needed, 44W wired charging is available, and the phone also supports reverse wired charging. USB Type-C 2.0 with OTG adds flexibility for compatible accessories and devices.
Who Should Buy This
Vivo vivo Y400 4G is a sensible choice for users who want a large, smooth AMOLED display, strong battery capacity, stereo sound, and dependable everyday connectivity. Its IP68/IP69 protection adds reassurance for routine exposure to dust and water, while dual-SIM support suits people who manage two numbers. The phone should appeal to streamers, commuters, students, and general users who value extended battery capacity over high-end processing power. The 8GB RAM configuration supports regular multitasking, and the 128GB or 256GB storage options offer useful flexibility. Users seeking expandable storage, a headphone jack, radio, or more advanced camera recording features may prefer a different device.
Pros
- Bright 120Hz AMOLED display
- Large 6000mAh battery
- IP68/IP69 dust and water resistance
- Stereo speakers with Hi-Res audio
- 8GB RAM with up to 256GB storage
Cons
- No microSD card slot
- No 3.5mm headphone jack
- Rear video recording limited to 1080p at 30fps
- No FM radio
Verdict
Vivo vivo Y400 4G is a well-equipped everyday smartphone built around a bright 120Hz AMOLED screen, a large 6,000mAh battery, stereo speakers, and strong dust and water resistance. Its 8GB RAM, Android 15 software, and generous storage options support comfortable routine use. The Snapdragon 685 is better suited to general tasks than demanding performance, while the camera system focuses on essential photography and 1080p video. For users prioritizing display quality, endurance, and protection, it is a practical recommendation.
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