Nokia XR20, 4GB/64GB, Ultra Blue

To protect smartphones (and tablet computers) from accidental scratches and damage, large companies install a particularly robust, but at the same time very thin protective layer on their device displays. The most popular and renowned is the Corning created Gorilla Glass protective layer.

Screen Resolution determines how much information (pixels) phone is capable of displaying. The higher the resolution, the image will be less grainy. Currently, when purchasing a smartphone we recommend to choose models with a resolution that is at least 720x1280 pixels high. Currently, most of the popular companies top models are already using FullHD (1080x1920) resolution displays.

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Screen size is fixed diagonally and recorded in inches (1 "= 2.54cm). Besides this an important parameter is the screen resolution.

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Dual Sim support indicates that 2 SIM cards can be inserted and used at the same time. They can even be of different service providers.

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Currently the 3.5mm headphone jack is the most popular audio connection. It provides the ability to connect the phone with almost any headphones, amplifier or external speakers.

Currently, most smartphones have built-in 8GB, 16GB or 32GB of memory storage for files, multimedia and applications. However, this amount may not be sufficient for a large music, photo or video collection. Therefore, on average, 50 percent of smartphones have an available memory card slot that allows you to increase the amount of data that can be stored. Most of the phones have built-in microSD memory slot, which usually allows the use of cards with up to 32GB of storage space, the latest models also support the 64GB microSDHC. More detailed information can be found on the manufacturer's website.

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Bluetooth is a widely used wireless connection that enables data transmission over short distances. It is used to transfer files between two phones or a phone and a computer. Also available are numerous Bluetooth accessories - hands-free systems, wireless headsets, HRM etc..

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Viedtālruņu akumulatora ietilpību norāda miliampērstundās (mAh). Teorijā - jo vairāk mAh, jo tālrunis spēj ilgāk darboties pēc vienas uzlādes reizes. Tomēr dabā tas nav tik vienkārši un pamatoti, jo strāvas patēriņš ir ļoti atkarīgs no telefona tehniskās specifikācijas - procesora jaudas, ekrāna izmēra un spilgtuma, kā arī operētājsistēmas optimizācijām un visbeidzot no lietošanas paradumiem.

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