Price and specifications of vivo X21 UD advantages, disadvantages, and a comprehensive explanation

Overview of Vivo X21 UD

The Vivo X21 UD is a smartphone that emerged during March 2018, capturing attention with its innovative features and reliable performance metrics. It is distinguished by its under-display fingerprint sensor, a technological advancement at the time, which adds a futuristic edge to its design. This device integrates robust specifications to cater to a range of smartphone users, providing seamless functionality and a sleek user experience.

Design and Build

The Vivo X21 UD boasts an elegant design with a dimension of 154.5 x 74.8 x 7.4 mm. This slim profile, coupled with a weight of only 156.2 grams, ensures that the phone is lightweight and comfortable to hold. The construction features a sophisticated combination of Gorilla Glass 3 on the front and an aluminum frame and back, offering a premium look and feel. The device also sports a Hybrid Dual SIM slot, supporting dual standby functionality.

Display Features

The display on the Vivo X21 UD is a key highlight, featuring a 6.28-inch Super AMOLED screen. This provides vibrant colors and deep contrasts, enhancing the visual experience. The screen occupies approximately 85.2% of the body's front, thanks to minimal bezels, offering a large viewing area. With a resolution of 1080 x 2280 pixels and a pixel density of about 402 ppi, the display ensures sharp and clear images, great for media consumption and gaming alike. Protection is offered by Corning Gorilla Glass 3, ensuring resistance to scratches and minor impacts.

Performance and Operating System

Under the hood, the Vivo X21 UD is powered by the Qualcomm Snapdragon 660 chipset. This processor, based on 14 nm architecture, brings efficient performance and balanced power consumption. It features an Octa-core CPU with four Kryo 260 Gold cores running at 2.2 GHz for high-performance tasks and four Kryo 260 Silver cores clocked at 1.8 GHz for more efficient processing. Graphics are handled by the Adreno 512 GPU, which provides satisfactory performance for most mobile gaming experiences.

The device operates on Android 8.1 Oreo, skinned with Vivo's Funtouch OS 4, which provides a user-friendly interface and additional customization options.

Memory and Storage

The Vivo X21 UD integrates 6GB of RAM, ensuring smooth multitasking and efficient app management. This is paired with 128GB of internal storage, ample space for storing media, apps, and documents. Additionally, storage can be expanded via a microSDXC card, utilizing a shared SIM slot, thus offering flexibility in storage capabilities.

Camera Specifications

The camera system on the Vivo X21 UD comprises a dual main camera setup and a single front camera. The rear configuration includes a 12 MP primary sensor with f/1.8 aperture, employing dual pixel PDAF for rapid and accurate focusing. Accompanying is a 5 MP depth sensor, which supports portrait photography and bokeh effect. Additional features include LED flash, HDR, and panorama mode, offering diverse photographic possibilities. The rear camera is capable of recording 1080p videos at 30fps, ensuring quality video capture.

For selfies, the device sports a 12 MP front camera with an f/2.0 aperture, also capable of 1080p video recording, making it suitable for video calls and self-portrait needs.

Battery Life and Charging

Battery life is supported by a non-removable 3200 mAh Li-Ion battery. While not the largest capacity in the market, it is sufficient for moderate usage throughout the day. Charging is facilitated through an 18W wired charger, delivering efficient replenishment of battery life.

Network and Connectivity

Network support includes comprehensive GSM, CDMA, HSPA, and LTE bands, ensuring global roaming compatibility. The device's connectivity options extend to Wi-Fi 802.11 a/b/g/n/ac, featuring dual-band and Wi-Fi Direct capabilities for strong wireless networking performance. Bluetooth 5.0 offers robust wireless data transfer capabilities, while support for GPS and GLONASS ensures precise navigation. It should be noted, however, that NFC is not supported on this model.

Audio and Additional Features

The Vivo X21 UD provides a standard 3.5mm headphone jack alongside a loudspeaker for audio playback, catering to traditional audio accessory use. The device also features FM radio capabilities, serving entertainment needs outside of streaming services.

Additional sensors include an accelerometer, proximity sensor, compass, and notably, an under-display optical fingerprint sensor—a defining feature, providing advanced security and quick access to the device.

Pricing and Availability

Available in Black and Ruby Red, the Vivo X21 UD offers aesthetic choices to suit personal preferences. At launch, the pricing was approximately 550 EUR, positioning it in the mid-to-high range segment of the smartphone market. Despite being launched in 2018, the Vivo X21 UD remains a commendable option for users seeking reliable performance with innovative features, especially given its unique under-display fingerprint sensor.