Vivo Y21d (128GB / 8GB RAM)

The Vivo Y21d has a straightforward, non-folding design measuring 166.1 mm tall, 77 mm wide, and 8.4 mm thick, with a total volume of approximately 107.43 cm³ and a weight of 209 g. A notable aspect of its build is the IP68 ingress protection rating, which certifies the device as waterproof to a depth of 6 m, offering solid resistance against water exposure in everyday situations. It does not feature a rugged construction, so while the IP68 rating provides meaningful water protection, the chassis itself is not built to withstand extreme physical stress.

The Vivo Y21d features a 6.68″ IPS LCD touchscreen with a 90 Hz refresh rate and a resolution of 720 x 1608 px, yielding a pixel density of 264 ppi. The panel is protected by branded damage-resistant glass, adding a layer of durability to the screen surface. It does not support HDR10, HDR10+, or Dolby Vision, and there is no Always-On Display mode or secondary screen present.

The Vivo Y21d is powered by the Unisoc T7225 chipset, built on a 12 nm process with an 8-thread CPU running at 2 x 1.8 GHz and 6 x 1.8 GHz using big.LITTLE technology, alongside a Mali G57 MP1 GPU clocked at up to 614.4 MHz with 2 execution units and 32 shading units. The SoC includes integrated LTE, integrated graphics, ARM TrustZone security, DirectX 11 support, and OpenCL 2.0 compatibility. It is paired with 8 GB of DDR4 RAM at 1866 MHz and a maximum memory bandwidth of 12.8 GB/s, supported by an L1 cache of 128 KB, an L2 cache of 2 MB, and an L3 cache of 1 MB. Storage comes in at 128 GB via eMMC 5.1, the chipset supports 64-bit processing, and the maximum addressable memory is capped at 8 GB.

The Vivo Y21d carries a single 50 MP rear camera with an f/1.8 aperture and a CMOS sensor, capable of recording video at 1080p and 30 fps with continuous autofocus during recording and slow-motion support. Autofocus options include phase-detection and touch autofocus, while manual controls extend to exposure, ISO, focus, and white balance, though manual shutter speed is not available. The rear camera also supports burst mode, panorama, and timelapse, and is backed by a single LED flash; there is no dual-tone flash, no optical zoom, no optical image stabilization, no BSI sensor, no built-in HDR mode, and no RAW capture. HDR10 and Dolby Vision recording are absent, as are 3D and 360-degree panorama shooting. On the front, a 5 MP camera with an f/2.2 aperture handles selfies without a dedicated flash, a dual-lens arrangement, or an under-display placement.

The Vivo Y21d runs Android 15, an open-source platform that supports multi-user operation, split-screen multitasking, picture-in-picture, widgets, sharing intents, and the ability to play games while they download. Productivity and display features include full-page scrolling screenshots, Live Text selection, dark mode, extra dim mode, dynamic and manual theme customization, customizable notifications, notification permission controls, a media picker, app offloading, offline voice recognition, and voice commands. On the privacy side, the OS offers clipboard warnings, location privacy options, camera and microphone access controls, and the ability to block app tracking, though cross-site tracking blocking, Mail Privacy Protection, and Wi-Fi password sharing are not present. Additional utilities include a battery health check, a child lock, device tracking, and on-device machine learning, while focus modes, Quick Start, and the ability to use the phone as a PC are not supported. OS updates are not delivered directly from the vendor.

The Vivo Y21d houses a 6500 mAh rechargeable battery that supports 44W fast charging, and a charger is included in the box. A battery level indicator is present for monitoring charge status. The battery is non-removable, and neither wireless charging nor reverse wireless charging is supported.

The Vivo Y21d includes stereo speakers but omits a 3.5 mm headphone jack, so wired audio requires an adapter. There is no radio tuner, and Bluetooth audio codec support is limited, with no aptX, aptX HD, aptX Adaptive, aptX Lossless, or LDAC available.

The Vivo Y21d supports dual SIM cards and connects via Wi-Fi 4 (802.11n) and Wi-Fi 5 (802.11ac), Bluetooth 5.2, and a USB Type-C port running USB 2.0. Cellular connectivity is present but limited to 4G LTE, with no 5G support. Download speeds reach up to 300 Mbit/s and upload up to 100 Mbit/s. The device includes a fingerprint scanner, GPS with Galileo support, a compass, and an accelerometer, while a gyroscope, barometer, infrared sensor, heart rate monitor, and ANT+ are all absent. An external memory slot is available for storage expansion. NFC, HDMI output, DLNA certification, 3D facial recognition, an iris scanner, crash detection, satellite SOS, a built-in projector, motion tracking, optical tracking, and a stylus are not included.

The Vivo Y21d includes a video light for illuminating footage during recording. The display is flat rather than curved, uses no e-paper technology, and is not protected by sapphire glass.