Vivo Y400 5G

The Vivo Y400 5G has a non-folding, non-rugged design that measures 162.3 mm tall, 75.3 mm wide, and 7.9 mm thick, with a total volume of 96.55 cm³ and a weight of 197 g. It carries an IP68 ingress protection rating, certifying it as waterproof at depths of up to 2 meters, which places it among devices offering solid protection against water exposure in everyday situations.

The Vivo Y400 5G features a 6.67″ OLED/AMOLED touchscreen with a resolution of 1080 x 2400 px and a pixel density of 395 ppi, delivering a 120Hz refresh rate alongside a typical brightness of 1200 nits. The display supports HDR10 and Always-On Display functionality, though it does not support HDR10+, Dolby Vision, or branded damage-resistant glass, and there is no secondary screen present.

The Vivo Y400 5G is powered by the Qualcomm Snapdragon 4 Gen 2 chipset, fabricated on a 4 nm process with a thermal design power of 4W and an octa-core CPU configuration running at 2 x 2.3 GHz and 6 x 2 GHz using big.LITTLE technology across 8 threads. Graphics are handled by the integrated Adreno 613 GPU clocked at 955 MHz, supporting DirectX 12, OpenGL ES 3.2, OpenCL 2, and up to 2 displays simultaneously. The device ships with 8 GB of LPDDR5 RAM at 3200 MHz and 256 GB of eMMC 5.1 internal storage, with the platform supporting a maximum of 16 GB of memory. Additional capabilities include integrated LTE, 64-bit support, ARM TrustZone security, and integrated graphics.

The Vivo Y400 5G features a dual-lens rear camera system combining a 50 MP sensor at f/1.8 and a 2 MP sensor at f/2.4, both using a CMOS sensor without back-side illumination or optical image stabilization. The main camera supports phase-detection autofocus, touch autofocus, and continuous autofocus during video, while manual controls cover exposure, ISO, focus, and white balance, though manual shutter speed is not available. Video recording reaches 1080p at 30 fps, with slow-motion recording also supported, but HDR10 and Dolby Vision recording are not. A single LED flash is present on the rear, with no dual-tone or RGB flash option, and the camera can shoot panoramas and timelapses but does not support 360-degree panoramas or RAW capture. On the front, a 32 MP single-lens camera sits at f/2.5 without an under-display placement or a dedicated flash, and no optical zoom is available on either camera.

The Vivo Y400 5G runs Android 15, a free and open-source platform that supports multi-user accounts, split-screen multitasking, Picture-in-Picture, widgets, sharing intents, and the ability to play games while they are still downloading. Privacy controls are broad, covering location access, camera and microphone permissions, clipboard warnings, and app tracking blocking, though cross-site tracking blocking and Mail Privacy Protection are absent. Personalization options include dark mode, dynamic theming, theme customization, and an extra dim mode, while productivity is aided by full-page screenshots, Live Text, customizable notifications, a media picker, offline voice recognition, voice commands, and app offloading. The device also includes a battery health check, a child lock, and phone tracking, but does not offer focus modes, Wi-Fi password sharing, Quick Start, direct OS vendor updates, or the ability to function as a PC.

The Vivo Y400 5G is equipped with a 6000 mAh rechargeable battery that is non-removable and supports 90W fast charging, allowing for rapid top-ups via cable. Wireless charging is not available, but a battery level indicator is present to help monitor remaining charge.

The Vivo Y400 5G includes stereo speakers but omits a 3.5 mm headphone jack, meaning wired audio requires an adapter or Bluetooth. On the wireless audio side, none of the high-quality codecs — aptX, aptX HD, aptX Adaptive, aptX Lossless, or LDAC — are supported, and there is no built-in radio.

The Vivo Y400 5G supports 5G cellular connectivity alongside Wi-Fi 4 (802.11n) and Wi-Fi 5 (802.11ac), and accommodates two SIM cards simultaneously. Bluetooth 5.0 and NFC are both present, while the USB Type-C port operates at USB 2.0 speeds; there is no HDMI output and no external memory slot. Download speeds reach up to 2500 Mbit/s with uploads up to 900 Mbit/s. The sensor suite includes a fingerprint scanner, GPS with Galileo support, a gyroscope, accelerometer, and compass, though a barometer, infrared sensor, heart rate monitor, iris scanner, and 3D facial recognition are all absent. Features such as crash detection, emergency SOS via satellite, ANT+, DLNA certification, motion tracking, optical tracking, a built-in projector, and a stylus are likewise not included.

The Vivo Y400 5G features a curved display and includes a video light, while it does not use sapphire glass or an e-paper display.