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. Battery The batteries of mobile devices differ in capacity and technology. They provide the electrical charge needed for the functioning of the devices. Capacity

The rear cameras of mobile devices use mainly a LED flash. It may arrive in a single, dual- or multi-light setup and in different arrangements. The 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. Similar to the CPU, the GPU consists of processing units called cores. They handle the computation of graphics in various applications. Information about the width, i.e. the horizontal side of the device when it is used in its standard orientation.The SAR body rating shows the maximum level of exposure to electromagnetic radiation when the device is positioned against the body at the hip. The highest SAR value of mobile devices allowed in the US is set to 1.6 W/kg per 1 g of tissue. It is specified by the FCC and the CTIA follows whether the mobile devices comply with this standard.

The device's storage configuration could be more generous, but its extensive operating system and quite useful primary camera are convincing. The input options are diverse, the screen is appropriate, and the performance sufficient for daily routine. The battery life also fits well to the good overall impression. We did not like the handset's sound quality and gaming performance as much, though. Information about the number of pixels on the horizontal and vertical dimensions of the photos taken by the front camera, indicated in megapixels as well.talk time is the time period a battery charge will last, if one is constantly talking on the phone in a 3G cellular network. This SAR rating shows the maximum level of exposure to electromagnetic radiation taken when the device is placed next to the ear. The applicable limit for the US is 1.6 W/kg per 1 g of tissue. In the US the FCC tests and sets the SAR limits for all mobile devices, which are controlled by the CTIA. Like its predecessor, the Galaxy XCover 4 is not suitable for extreme situations, but quite well-equipped for the uncertainties of everyday life. The hard shell conceals a solid, lower mid-range smartphone.

As usual with Samsung, there are many aids for disabled users and diverse control options, such as turn to mute, emergency messages or display several apps simultaneously via a multi-window display. The color depth of the display is also known as bit depth. It shows the number of bits used for the color components of one pixel. Information about the maximum number of colors the screen can display. Networks A mobile (cellular) network is a radio system, which allows a large number of mobile devices to communicate with each other. GSM

Accessories and Warranty

The capacity of a battery shows the maximum charge, which it can store, measured in mili-Ampere hours. The Samsung Galaxy Xcover 4 has models SM-G390F, SM-G390W, And SM-G390Y. This phone has been succeeded by the Xcover 4s. Information about the process technology used in manufacturing the chip. The value in nanometers represents half the distance between elements that make up the CPU.