Specifies the number of pixels (dots) on the screen. Typically, the display resolution is listed in a format such as 1920 × 1 080. In practice, the higher the resolution, the better the image quality. Do not forget to compare the resolution to the screen size, however. If you have two phones with the same display resolution, the image quality on the phone with a smaller screen will be better because its screen pixel density is higher.
For mobile phones, IP Code is an international standard that classifies and rates the degree of protection provided against dust and water. Each IP code consists of the letters IP and some xy designation, for example IP57. The first digit after the prefix denotes dust-resistance and ranges from 1 to 6. The second digit denotes the phone’s water resistance and ranges from 1 to 8. The most durable phones on the market are labelled IP68 – they are fully waterproof and dustproof, so you can submerge them to a certain depth for a time specified by the manufacturer.
A pair of GSM modules allows you to operate two active SIM cards in one phone simultaneously. The primary slot usually supports voice and data services, while the secondary slot supports only voice services. You'll find more information in the user manual provided by the manufacturer.
The Night Shift function aims to reduce the amount of blue light in your display after sundown, leading to improved sleep. Based on your device's clock and location, it automatically adjusts the display colours to the warmer end of the spectrum at sunset. Night Shift function is available with an update for iOS 9.3 and requires an iPhone 5S or later.
AMOLED, or Active Matrix Organic Light-Emitting Diode, belongs to the OLED family of display technologies. This is the most advanced display technology on the market. Compared with competing technologies, it boasts faster response times, lower energy consumption, and sharper colours. You can also enjoy perfect black colour reproduction, which results in better readability in direct sunlight. AMOLED displays also offer wide viewing angles, which in the case of IPS displays reach almost 180 degrees. However, the disadvantage of AMOLED technology is its higher price and shorter lifespan.
A method of rendering LCD-display images. In this case, the image is formed by a thin film of transistors. A thin part of the display consists of small transistors that control individual picture points, or pixels. Unlike previous technologies, it has brought high image quality, high contrast, lower power consumption and smaller size. Today, the biggest advantage of TFT displays is the price. Compared with premium OLEDs, they also have a significantly longer life.
The screen size is measured by the distance between the left bottom and top right corners of the display. The screen size is usually given in inches, with 1"= 2.54cm.
