Purchasing a mobile phones is not a daily job because they are comparatively pricey. So, if you decide to invest in a new device, make sure to get the adequate one for you. This vivo X21 review is your best resource for grasping the meanings of the majority of vivo X21 features, which will allow you to make an informed decision.
After declaring vivo X21 by vivo on 3/1/2018, this model has been Released 2018, March. However, this model status in the market is: Available.
When you buy vivo X21, 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. it Also has 64GB 6GB RAM, and 3200 mAh battery life (the more mAh value gives more strength to the battery).
vivo X21 comes with Corning Gorilla Glass 3 as a display protection that is intended to protect the screen when the phone falls on hard and rough surfaces, and with 6.28 inches, 98.4 cm2 display size.
vivo X21 comes with the following OS and chips:
* 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 understand the meanings of smartphones specs, continue reading this vivo X21 review.
The Body Features – vivo X21 Review
People are often interested in the cellular phone’s body features, which prompted most mobile phone producers to use a considerable part of the company’s research and budget to evolve this aspect of smartphones so that it suits all the aspirations of the consumer. In the following lines, you will find vivo X21 review, which will demonstrate the most important details related to the body of this device.
* 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).
For smartphones, a weight between 140g to 170g is considered proper for most users.
* Body Build: Glass front (Gorilla Glass 3), aluminum back, aluminum frame.
The most known cellular phones body types are shown here:
* Metal. In order to give the inner components of cellular phones the best protection, some manufacturers build the phones’ bodies out of metal..
* Glass. Devices whose body is made of glass may look more appealing, but this kind is not considered robust when dropping on hard surfaces.
* Plastic. This kind is very functional, so it is the most widespread one in the manufacture of mobile phone bodies.
Know All available Colors – vivo X21 Review
It is relatively important to take care of selecting the smartphone color because the colors reflected from the device will affect adversely or favorably the colors that shown on the display screen.
vivo X21 comes in the following colors: Black, Aurora White, Ruby Red.
vivo X21 Review – Understanding Display Terms
As mobile phones innovations evolve very fast, it is difficult to know any mobile phone or combination of characteristics as the best. This is relevant to the screen’s quality and features. In fact, selecting it depends on your preference and the areas in which you use mobile phones. In the following lines, we will sort-out the primary display features of vivo X21
Display Type: Super AMOLED – Always choose a screen kind that provides genuine black and more glaring colors.
Display Size: 6.28 inches, 98.4 cm2 – The common standard screen size of cellular phones 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 comes with the following display protection:
* Corning Gorilla Glass 3
* Corning Gorilla Glass 3.
Knowing Camera Specs Using vivo X21 Review
In the following lines, you will find vivo X21 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 cellphone.
(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 review of the selfie camera:
* Selfie Camera Single: 12 MP, f/2.0, (wide), 1/2.8″, 1.28µm
The main camera specs are:
1080p@30fps Selfie video camera.
the SIM Card characteristics – vivo X21 Review
A SIM (Subscriber Identity Module) is a smart card that connects your cell phone to the mobile network so that you can make calls, send SMS messages, and use mobile internet services like 3G, 4G LTE, and 5G. For more info about 3G / 4G networks, refer to vivo X21 3G or vivo X21 4G articles You can use your mobile phone without a SIM card for many things, like playing games, using the calculator, saving notes, taking photos, and many other applications. The following three sizes are available for SIM cards: Standard (Mini), Micro, and Nano.
This cellphone 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 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 cellular 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 mobile phone.
The Performance – vivo X21 Review
This model has Qualcomm SDM660 Snapdragon 660 (14 nm) chipset.
A chipset on a cellular phone is most usually referred as a system on chip (SoC). It is an integrated circuit that combines all basic components of a device on a single chip. The most popular kinds are: QUALCOMM Snapdragon, MEDIATEK CHIPSETS, and INTEL ATOM.
vivo X21 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 by increasing the number of cores and the processing speed.
vivo X21 has the following GBU (Graphics Processing Unit): Adreno 512.
This chip is responsible for processing and accelerating all graphics jobs, and more faster GPU means more powerful mobile phone will be.
vivo X21 Review of the Storage features and Capacity
The quantity of storage that a new cellular phone provides is one of the primary decision considerations.. Actually, vivo X21 comes with microSDXC (uses shared SIM slot) memory card slot, and the following internal storage: 64GB 6GB RAM – 128GB 6GB RAM
There are two types of phone’s memory:
Internal: It is integrated inside the phone, and can’t be expanded. These days, most cellphones 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 Review
A mobile network is the system that secures wireless communications for mobile devices. This is done through connection towers comprising specific geographical areas. There are 3 kinds of these networks: 3G, 4G (LTE) and 5G. These kinds are supported by the most recent cellphones.
vivo X21 supports the following networks: 3G. For more info, refer to vivo X21 3G article. – 4G. For more information, refer to vivo X21 4G article.
vivo X21 Review – Available Wireless Connections
This model includes 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 smartphone to determine 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 (rear-mounted), 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 Review
This model comes with {Android 8.1 (Oreo), Funtouch 4} operating system.
vivo X21 Review of The Battery Main Specs
Nothing is more important than the battery of the smartphone that keeps these devices running and providing daily life functioning. The following lines are containing vivo X21 review of its primary battery.
* Battery Technology: {Li-Ion}.
* vivo X21 comes with {non-removable} battery.
* Battery Capacity: {3200} mAh. It refers to the amount of storage volume a particular battery able to 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 22.5W}.
* Battery Charging Time: {50% in 24 min (advertised)}.
vivo X21 Review of the Battery Secondary Specs
In addition to the major vivo X21 specifications that we mentioned earlier, this model has more battery-related features that are relatively varied depending on the type of the cellphone. Here are these features:
* Battery Charging Original: {Fast charging 18W}.