Many people think about how cellular networks work, what happens when we press the call button? When calling each other, the often called subscriber is not only within the same city, but even on another continent. How does cellular communications work?
PRINCIPLE OF ACTION OF CELLULAR COMMUNICATIONS
In most of the territory of our country, mobile communications equipment is located, it is called base stations. They are clearly visible in open areas – in the fields between settlements. In the city, they are often placed on the roofs of buildings. The base station is able to pick up the signal from the smartphone at a distance of up to thirty-five kilometers, the contact between the towers is carried out by means of a special service or voice signal.
The active development of mobile communications has created a problem of limiting the frequency, namely, the working channels located close to each other began to overlap, creating interference. Continue reading
In fact, a smartphone and a phone are one and the same device, originally intended for telephone communication. At the same time, smartphones are called mobile phones that have an operating system, thanks to which gadgets acquire vast potential and capabilities and become close in capabilities to real personal computers.
Buy a smartphone, but how to choose a good one? Instructions for choosing a smartphone:
1. Decide on the price of a smartphone
Set your budget price limit for a smartphone. So, the limit can be limited to five thousand rubles, maybe you are ready to buy a smartphone for 10,000 rubles, or decide to purchase a functional mobile phone from 20,000 rubles. Continue reading
• At the time of the appearance of the first mobile phones, few could have imagined that a few years would pass and the mobile phone would literally transform into a personal mobile computer. The beginning of the mass use of mobile voice communications was a huge achievement and brought a colossal round of technological development of civilization. The purpose of the first mobile phones was to create the very possibility of making calls and sending SMS messages, which was a real breakthrough of that time.
• In parallel with the beginning of mass sales of conventional cell phones, the development and implementation of complex devices that were less well-known and belonged to the category of PDAs (pocket personal computers), for example, the HP brand, was carried out. Manufacturers of conventional mobile phones continued the active development of gadgets, which initially resulted in the implementation of polyphonic ringtones, a color screen, and a camera. For the necessary improvement of characteristics and further progress, there was a massive introduction of operating systems, on the basis of which new opportunities were opened. That is, in fact, mobile phones have gradually transformed into personal computers / PDAs, in other words, smartphones. It is the presence of a multifunctional OS that distinguishes an ordinary mobile from a smartphone. Continue reading
Today, smartphones with a screen of 5 inches are actively losing their popularity. Just a few years ago, five-inch phones were at the peak of their fame, and it would seem that an even larger screen would make the gadget uncomfortable, but everything changed. Such displays were replaced by new technologies and devices with 6-inch screens. Stereotypes about huge uncomfortable “shovels” began to recede into the past, for which there are justified explanations.
The new models of smartphones 2019 are strikingly different from their counterparts, released years earlier, in addition to the wide functionality, the devices demanded immediately have a slim body, and the frame around the screen takes up the smallest possible space. Thus, due to the optimization of dimensions, reduction of frames and thickness, current models, having a large six-inch display, do not differ in width and height from their predecessors, which had a slightly smaller screen diagonal. Continue reading
The updated Android OS to version 10 is not yet found in mass production, but there is already a lot of information to consider what its differences are from previous versions. The tenth version received a number of rather interesting innovations, how weighty they are, to judge consumers based on the needs in each case. For some, the innovations will not be significant, for some, the new parameters will be of genuine interest.
Consider some of the key features announced by the developer:
Added the ability to display the screen menu in black. We are talking about quickly turning on the dark mode in the settings, spreading globally to all sections of the menu and some applications. This mode may be of interest for aesthetic reasons, in order to relieve eye strain at a certain time of the day or to save energy on devices with OLED screens. Continue reading