Here you will be able to read the best vivo X21 UD review to know what are the jargon related to vivo X21 UD features, in terms of battery capacity, CPU type, display size, etc. Thus, you will comprehend their meanings, and you will be able to make the proper decision when you buy a new mobile phone.
vivo corporation announced vivo X21 UD smartphone model on 3/1/2018, and Released 2018, March. However, this model status in the market is: Available.
vivo X21 UD has a 6.28 inches, 98.4 cm2 display size and Corning Gorilla Glass 3 as a display protection that is designed to save the screen when the phone drops on hard and jagged surfaces.
vivo X21 UD has 128GB 6GB RAM, and 3200 mAh battery life (the more mAh value gives more strength to the battery). When you purchase vivo X21 UD, you will gain a 12 MP, f/1.8, 1/2.55″, 1.4µm, dual pixel PDAF rear camera and 12 MP, f/2.0, (wide), 1/2.8″, 1.28µm selfie camera.
vivo X21 UD comes with the following performance and platforms:
* Android 8.1 (Oreo), Funtouch 4 OS,
* Qualcomm SDM660 Snapdragon 660 (14 nm) Chipset,Octa-core (4×2.2 GHz Kryo 260 Gold & 4×1.8 GHz Kryo 260 Silver) Processor.
To get a full good vivo X21 UD review and make a well-informed decision on what device you will buy, continue reading this article.
Know All About Body Specs In This vivo X21 UD Review
While choosing a smartphone, one of the most important choices to be considered is the cellular phone’s body specifications, which are body dimensions, body weight, and body build. The lines that follow have a vivo X21 UD review related to the body specifications..
* Body Dimensions: 154.5 x 74.8 x 7.4 mm (6.08 x 2.94 x 0.29 in) which mean height, width, and thickness (depth) respectively.
* Body Weight: 156.2 g (5.50 oz).
A mobile phone should be between 140g and 170g in weight, which is suitable for the majority of people.
* Body Build: Glass front (Gorilla Glass 3), aluminum back, aluminum frame.
There are many body kinds available in the markets:
* Metal. The name show that this type is made of metal, so it has the highest strength to protect the smartphone components.
* Plastic. It can be more robust than metals because it doesn’t bend and long-lasting than glass as it doesn’t crash easily.
* Glass. Glass-encased cellular phones have a more attractive and polished., however glass is more likely to break due to its crisp nature.
Know All available Colors – vivo X21 UD Review
Modern cellular phones come in a variety of colors. Companies are also manufacturing gradient colors in addition to solid color devices.
vivo X21 UD comes in the following colors: Black, Ruby Red.
All About Display features in one vivo X21 UD Review
The mobile phone’s display is the main part of the user interface, so it is important to understand its specifications well, then you will be able to select a cellular phone with screen that provides your needs.
The following lines represent the major features of vivo X21 UD. screen
Display Type: Super AMOLED – Keep in mind to go for a display type that provides more vivid colors and genuine black..
Display Size: 6.28 inches, 98.4 cm2 – The common standard screen size of smartphones now averages between 4.7 and 6.5 inches.
Screen To Body Ratio: (~85.2% screen-to-body ratio). It refers to the percentage of how much the screen covers the front face. Smartphones that have the largest screen to body ratio look delicate and give it a premium look.
Display Ratio: 19:9 ratio. the Aspect ratio is the relevance between the height and width of the smartphone screen. Taller aspect ratios like 19.5:9 is coming with the most modern smartphones, and it is suitable for web browsing, and other portrait orientation apps.
Display Resolution: 1080 x 2280 pixels. It is the clarity of an image video in details and sharpness. The pixel resolution for high definition screens is 1920 x 1080.
Display Density: (~402 ppi density). It is the number of physical pixels per inch on a screen, and is measured in Pixels Per Inch (ppi).
Display Protection: vivo X21 UD comes with the following display protection:
* Corning Gorilla Glass 3
* Corning Gorilla Glass 3.
Camera Specs- vivo X21 UD Review
In the following lines, you will find vivo X21 UD review about the main cameras.
* Main Camera Single: {12 MP, f/1.8, 1/2.55″, 1.4µm, dual pixel PDAF}.
The following lines sort-out some of the symbols included in the camera specifications:
MP (Megapixels) is the resolution of the image taken by a cellular phone.
(f value) is the aperture of a lens indicates how much light it lets in. The larger the aperture, the more light is let in; conversely, a smaller aperture lets in less light.
(mm value) This measurement is of the lens’s focal length, which affects the final image that is produced by your camera.
AutoFocus (AF) is the function of a camera to automatically focus on a subject.
* Main Camera Dual: 5 MP, f/2.4, (depth)
The main camera features are as follows:
HDR, panorama, 1080p@30fps main video camera.
Here is the vivo X21 UD review of the selfie camera:
* Selfie Camera Single: 12 MP, f/2.0, (wide), 1/2.8″, 1.28µm
The main camera features are:
1080p@30fps Selfie video camera.
vivo X21 UD Review of the SIM Card
SIM an abbreviation for Subscriber Identity Module, and it’s a small plastic card that fits into your cellular phone. There are three sizes available for this electronic chip: Standard (Mini), Micro, and Nano, and it lets you connect to a cellular network. Then, you can make calls, send SMS messages, and connect to mobile internet services like 3G, 4G, and 5G. For more information about 3G / 4G networks, refer to vivo X21 UD 3G or vivo X21 UD 4G articles. However, you can use the cellphone without a SIM to use some available programs on it, play games, and connect to a Wi-Fi network to explore the internet.
This mobile phone model comes with Hybrid Dual SIM (Nano-SIM, dual stand-by) card. For more information, refer to How to insert SIM card in vivo X21 UD article.
Here are the common SIM card types:
* Nano SIM. It is the smallest removable SIM card size, so it is the most modern one (other than eSIMs, which we’ll read about it very soon) and it’s used by the vast majority of current mobile phones.
* Micro SIM. They have a slightly larger chip, and they haven’t been utilized too often recently.
* Standard SIM (Mini SIM). It is the biggest SIM card size in use, and it’s the most rarely used.
* eSIM. It is an embedded SIM card, i.e., you can’t take it off of your smartphone.
vivo X21 UD Review – The Main Hardware Platforms
This model has Qualcomm SDM660 Snapdragon 660 (14 nm) chipset.
A chipset on a cellphone is most usually referred as a system on chip (SoC). It is an integrated circuit that combines all basic parts of a device on one chip. The most famous kinds are: QUALCOMM Snapdragon, MEDIATEK CHIPSETS, and INTEL ATOM.
vivo X21 UD has Octa-core (4×2.2 GHz Kryo 260 Gold & 4×1.8 GHz Kryo 260 Silver) CPU.
The performance of the CPU will be improved if the CPU has more cores and higher speed of processing.
vivo X21 UD has the following GBU (Graphics Processing Unit): Adreno 512.
This chip is responsible for handling and accelerating all graphics jobs, and more faster GPU means more powerful mobile phone will be.
vivo X21 UD Review of the Storage Specs and Capacity
The quantity of storage that a new mobile phone provides is one of the essential decision considerations.. Actually, vivo X21 UD comes with microSDXC (uses shared SIM slot) memory card slot, and the following internal storage: 128GB 6GB RAM
There are two types of phone’s memory:
Internal: It is integrated inside the phone, and can’t be increased. These days, most smartphones come with internal storage of at least 32GB or 64GB and a few high-end models feature 256GB or 512GB.
External: It is a removable SD card used as an alternative memory to store photos, music, videos, etc., regardless of the kind of SD card slot.
Mobile Networks and communication – vivo X21 UD Review
A mobile network, often known as a wireless network, is a technology for transmitting and receiving radio waves between users. It is made up of base stations, each of which comprises a separate region or “cell”. This makes it possible for several portable devices such as smartphones to connect together. Actually, 3 types of working mobile networks: 3G, 4G (LTE), and 5G.
vivo X21 UD supports the following networks: 3G. For more info, refer to vivo X21 UD 3G article. – 4G. For more information, refer to vivo X21 UD 4G article.
Available Wireless Connections – vivo X21 UD Review
This model supports the following wireless connections:
* WLAN connection: {Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot}. Wireless Local Area Network depends on Wi-Fi to connect to the home or office wireless network using the local router and offers Internet access.
* Bluetooth connection: {5.0, A2DP, LE}. It is a common wireless communication protocol used to communicate two devices together over short distances, allowing them share data between different devices.
* GBS connection: {Yes, with A-GPS, GLONASS}.Global Positioning System enables mobile phone to define any position you need.
* USB connection: {microUSB 2.0, USB On-The-Go}.Universal Serial Bus is wired technology that allows users to connect two devices, such as a smartphone with a PC, to either transfer data or to charge the connected device.
* Features Sensors: {Fingerprint (under display, optical), accelerometer, proximity, compass}. The sensor is a device that detects and majors the changes in the nearby environment such as ambient light and motion.
The Operating System – vivo X21 UD Review
This model comes with {Android 8.1 (Oreo), Funtouch 4} operating system.
PHONE Review – The Battery Main Specs
Nothing is more important than the battery of the cellular phone that keeps these devices running and providing daily life functioning. The following lines are containing vivo X21 UD review of its primary battery.
* Battery Technology: {Li-Ion}.
* vivo X21 UD comes with {non-removable} battery.
* Battery Capacity: {3200} mAh. It refers to the amount of storage volume a particular battery can provide. A battery with 3100 mAh capacity rating could supply a current of 3100 mA for one hour. Higher mAh ratings for the same battery type will usually mean more working time.
* Battery Charging: {Fast charging 33W}.
* Battery Charging Time: {100% in 56 min (advertised)}.
vivo X21 UD Review – The Battery Secondary Specifications
In addition to the primary vivo X21 UD specifications that we mentioned earlier, this model has more battery-related features that are relatively varied depending on the model of the mobile phone. Here are these features:
* Battery Charging Original: {Fast charging 18W}.
* Second Type of Battery Charging Time: {100% in 69 min (advertised)}.
* Battery Wireless Charging: {Fast wireless charging 30W}.
* Battery Wireless Reverse Charging: {Reverse wireless charging 10W}.
* Quick Charge: {Quick Charge 4+}.
* Power Delivery: {Power Delivery 3.0}.