System on Chip (SoC) A system on a chip (SoC) includes into a single chip some of the main hardware components of the mobile device. SoC W-CDMA (Wideband Code Division Multiple Access) is an air interface used by 3G mobile networks. It is one of the three different UMTS interfaces together with the TD-SCDMA and the TD-CDMA. The standard provides faster data transfer speeds and allows more users to connect to the network simultaneously. Networks A mobile (cellular) network is a radio system, which allows a large number of mobile devices to communicate with each other. GSM Connectivity options on the Nokia C21 Plus include Wi-Fi 802.11 b/g/n, GPS, Bluetooth v4.20, USB OTG, Micro-USB, 3G, and 4G (with support for Band 40 used by some LTE networks in India). Sensors on the phone include accelerometer, ambient light sensor, proximity sensor, and fingerprint sensor.

Information about additional software and hardware features of the rear camera which improve its overall performance. The Nokia C21 Plus runs Android 11 Go Edition, which is a tailored version of Google’s mobile OS specifically designed for low-end devices. What this means is that the phone launches with tweaked ‘Go’ versions of Google’s applications, such as Chrome, Maps and Gmail. Information about the sensor type of the camera. Some of the most widely used types of image sensors on mobile devices are CMOS, BSI, ISOCELL, etc.Graphics rendering is also much improved, although the picture here is still rather bleak. An average on-screen frame rate of 16fps in the GFXBench Manhattan 3 gaming test is over three times faster than the Nokia 1.4’s result but there’s still a lot of room for improvement. Information about the number of pixels per centimeter (ppcm) or per inch (ppi) of the display. The higher the pixel density, the more detailed and clearer is the information displayed on the screen. Display The display of a mobile device is characterized by its technology, resolution, pixel density, diagonal length, color depth, etc. Type/technology CPU is the Central Processing Unit or the processor of a mobile device. Its main function is to interpret and execute instructions contained in software applications. There’s an okay amount of detail to captured images and the colour balance is nice and neutral but it’s far from perfect. Depending on the light, photographs can look soft and in bright conditions, it had a tendency to overexpose images. There was a fair amount of lag between pressing the shutter button and the camera actually capturing the image, too.

RAM (Random-Access Memory) is used by the operating system and all installed applications. Data in the RAM is lost after the device is turned off or restarted. Budget smartphones hardly push the boundaries in terms of design but the Nokia C21 is better than most.

Information about the width, i.e. the horizontal side of the device when it is used in its standard orientation.

Design Information about the dimensions and weight of the device, shown in different measurement units. Body materials, available colors, certifications. Width The instruction set architecture (ISA) is a set of commands used by the software to manage the CPU's work. Information about the set of instructions the processor can execute. Information about the manufacturer and model of the image sensor used by this camera of the device. Nokia C21 Plus mobile was launched on 27th February 2022. The phone comes with a 6.52-inch touchscreen display offering a resolution of 720x1600 pixels and an aspect ratio of 20:9. Nokia C21 Plus is powered by an octa-core Unisoc SC9863A processor. It comes with 2GB, 3GB, 4GB of RAM. The Nokia C21 Plus runs Android 11 (Go edition) and is powered by a 4000mAh battery.One of the main characteristics of the display is its type/technology, on which depends its performance. The aperture (f-stop number) indicates the size of the lens diaphragm opening, which controls the amount of light reaching the image sensor. The lower the f-stop number, the larger the diaphragm opening is, hence, the more light reaches the sensor. Usually, the f-stop number specified is the one that corresponds to the maximum possible diaphragm opening. The handsets are both 6.5in devices featuring a V-shaped notch for said selfie camera. While both phones are near enough the same physical size, the two handsets also differ in terms of their battery capacity: 3,000mAh on the regular phone and 4,000mAh on the Plus model. Both batteries, unusually, are user-replaceable, which is a design decision that’s gone out of fashion over the course of the last decade and something we’ve certainly missed. A CPU core is the processor unit, which executes software instructions. Presently, besides single-core processors, there are dual-core, quad-core, hexa-core and so on multi-core processors. They increase the performance of the device allowing the execution of multiple instructions in parallel.

Finally, video is captured at 1080p and 30fps, up from the 720p limit on the Nokia 1.4. Footage looks good for the most part but there’s no image stabilisation so you’ll have to be careful to hold your phone still when recording. Nokia C21 Plus review: Verdict The Nokia C21 Plus has a large 6.52in 720p IPS display and a dual-camera array. A Unisoc SC9863A processor runs the show, alongside 2GB of RAM, 32GB of expandable storage and a 4,000mAh battery. It uses a specially tailored version of Android for low-power devices, called Android 11 Go, with Nokia promising up to two years of core Android upgrades as well. Nokia C21 Plus review: Price and competitionThe display resolution shows the number of pixels on the horizontal and vertical side of the screen. The higher the resolution is, the greater the detail of the displayed content.