Comparison Xiaomi Mi A1 64 GB vs Xiaomi Redmi Note 4x 64 GB / 4 GB

The ratio of the screen area to the total front panel area of the phone. Simply put, this spec describes how much of the front panel is occupied by the screen; the rest is the bezels.

This indicator is given exclusively for smartphones with touch screens — it is for them that it is most relevant. The larger the percentage of the body is occupied by the screen, the thinner are the bezels, the neater the smartphone looks and the more convenient it is to work with it with one hand. As for specific numbers, the average values are 80 – 85 %, the higher values allow us to talk about a thin bezel, and more than 90 % — about a “bezel less” design.

Separately, we note that this parameter has nothing to do with the aspect ratio of the screen. The aspect ratio describes only the display itself — its proportions, the ratio between the larger and smaller side of the rectangle.

The term "operating system" refers to all types of firmware — both full-fledged OS like iOS and Android, used in smartphones, and software shells for regular phones (non-smartphones). The main difference between these two is that a full-fledged OS initially has more extensive features, and also allows you to install and remove various applications — from games and social network apps to specialized tools like photo and video editors.

Among modern smartphones, two operating systems are most widely used — Android and iOS. Here is a more detailed description of each of them:

— Android. Free open source OS from Google. Used by all modern manufacturers except Apple; presented in many versions — in particular, 10 Q, 10 Go Edition, 11 R, 11 Go Edition, Android 12, Android 12 Go Edition, Android 13, Android 13 Go Edition, Android 14 are relevant today. This OS is notable primarily for its full-fledged multitasking and an extensive range of available applications — Android surpasses iOS in both; on the other hand, in general, the quality of Android applications is somewhat lower due to the low re...quirements for them. Initially, Android has tight integration with Google services — the Google Play app and content store, Gmail mail, Google Drive cloud storage, etc.; however, exceptions to this rule are possible. Note that the latest versions of this OS can be found on the market both in its original form and in one of two specific editions:

• - Go edition. Modification of Android, designed for low-cost smartphones with "weak" hardware. Both the OS itself and standard applications (Assistant, Gmail, etc.) have been redesigned in this edition in such a way as to ensure reliable operation even with low performance. At the same time, the developers tried to preserve the features of full-fledged Android as much as possible — however, some specific fwatures in the Go Edition were still not available (for example, standard maps do not support step-by-step navigation).
• - HMS. Edition of Android, used in smartphones from Huawei. Due to US sanctions against China, this company cannot fully cooperate with Google — in particular, use Google services (Google Mobile Services — GMS) in its Android smartphones. As a replacement, HMS — Huawei Mobile Services were introduced. These services include Huawei ID, AppGallery, equivalents of Google's core services (assistant, browser, cloud storage, music/video, etc.), and app developer tools.

As for individual versions of Android, here are the main features of the options that are relevant nowadays:

• - Android 10. Version released in September 2019. This version introduced an expanded set of full-screen gestures (with the possibility of optimization in individual applications — in particular, disabling gestures on certain areas of the screen to avoid conflicts), a "dark" screen mode at the system level, a number of important security updates (including a separate encryption standard for weak devices that do not support the AES format at the hardware level), full support for 5G communications and improved capabilities for working with augmented reality. In addition, a number of solutions have been implemented to optimize the experience on foldable smartphones with a flexible screen.
• - Android 11. Another major update, released in the fall of 2020. The main updates touched messages and notifications. So, a separate section "Conversations" for messages was created in notifications, it also became possible to display various correspondence in the form of a "bubble" on top of any running application (Bubbles feature). Do Not Disturb mode has been expanded — now you can add exceptions to it for individual correspondence. Other important innovations include a system tool for recording screen video, a single control centre for smart home components, quick switching between playback devices (phone speaker, wireless headphones, Smart TV, etc.), native support for Android Auto, as well as expanded the ability to control the access of individual applications to certain data.
• - Android 12. A popular operating system released in 2021. The new concept of Material You is based on discreet colour palettes and minimalistic two-dimensional objects with advanced animation. The system theme now adapts to the colour scheme of user's desktop wallpaper (Monet feature), and instead of round settings icons in the notification bar, rectangular dice with rounded edges are now used. The designers also reworked the animation of flipping through desktops, plugging in a charger, and so on. In smartphones running Android 12, instead of precise geolocation, you can select approximate location information, and icons have appeared in the notification bar that signal the inclusion of a camera or microphone when using certain applications. The Privacy Dashboard option reveals information about which programs have accessed the camera and microphone. The NFC on mobile devices can henceforth be used as a virtual key for a car (Car Key). Another innovation in the system is the call to Google Assistant by long pressing the power button of the smartphone.
• -Android 13. A popular operating system for mobile devices, the 13th version of which was released in 2022. There were no major innovations in Android 13, but the OS brought a number of useful features and changes. In particular, the Material You workspace design concept can now pick primary colors from installed wallpapers or themes and apply them to the display of icons throughout the system. Privacy of user data has been taken to a new level of quality - in Android 13, you can configure individual permissions and select specific images from the Gallery that the application is granted access to. For each program, the user is free to choose a standard interface language. The system has also become more energy efficient, with improvements to the clipboard and barcode scanner.
• -Android 13 Go. A light version of the Android 13 operating system, designed for installation on low-powered smartphones. A distinctive feature of the OS is the presence of a special algorithm that optimizes the computing power of the smartphone. Also, the system lacks some hardware-demanding functions. Android 13 Go introduced the design concept of the Material You interface, which allows you to adapt the color scheme of the menu to match the installed wallpaper. From the full-fledged Android 13 system, the Go version borrowed the function of issuing permissions to applications to send notifications and the ability to change the language for specific programs.
• - Android 14. Operating system for mobile devices, released in 2023. There are, frankly, few system changes in the 14th version of the Android OS, and its main emphasis is on flexible customization of the interface. Among the innovations, it is important to mention the function of displaying notifications using the flash or display: for each application, you can now set a flashlight blinking pattern, and in the case of the screen, select the color palette of notifications. Also in the operating system, we implemented a useful ability to adjust the capture of screenshots, added a widget to display the battery charge and a list of active connections, and introduced an option for cloning applications in a systemic way. System fonts in the OS can be enlarged up to 200% of the standard size, while the scaling is implemented non-linearly - first of all, it is used for small text. Among other things, there are improved energy efficiency of the system and cosmetic changes in the interface in the manner of more rounded elements.

— iOS. Apple's own operating system, used only in the gadgets of this manufacturer. The main advantages of iOS over Android are, first of all, careful optimization for specific devices (which allows you to achieve good performance with relatively modest amounts of RAM), general usability and safety, as well as high quality applications. In addition, iOS updates are released regularly and are available for all devices (with the exception of frankly outdated ones that no longer can handle new versions of the system). On the other hand, this OS does not support multitasking and is as closed to the user as possible: in particular, applications can only be installed from the original store, there is no access to the file system, memory cards are not supported.

— HarmonyOS. Huawei's Universal Operating System, also known as Hongmeng. It is used in a wide range of devices: appliances from the smart home ecosystem, smartwatches, smartphones and tablets. Harmony OS is a kind of add-on on top of Android without Google services. The app store for Harmony OS devices is called AppGallery.

— FlymeOS. A modified version of the Android operating system used as a software shell for Meizu smartphones. The OneMind engine is responsible for the stability of the OS. There is no application menu in Flyme OS, and all program icons are scattered across desktops. Distinctive features of the shell include advanced tools for working with files, the Aicy voice assistant, flexible adjustment of the mEngine vibration signal, Family Guardian parental control options, a structured gallery with a convenient visual editor.

— Proprietary. This term most often means the basic firmware installed in a regular phone (not a smartphone), usually, a push-button one. Such firmware has a more modest set of pre-installed programs than full-fledged OS; expanding this set is at best possible with Java-based universal mobile applications, and often additional applications are not supported at all. However, this cannot be called a disadvantage due to the specifics of the use of traditional phones.

Note that you can find devices with other operating systems, in addition to those described above. However, for the most part, these are either outdated models or devices with rare and uncommon types of firmware.

"clean" Android operating system/

The Android OS is open source, allowing developers to create various modifications of this OS, including branded builds and software shells. Such modifications can be quite advanced, but they often change or even limit the functionality of the original Android, and updates to such firmware are highly dependent on their creators and often fall back behind updates to the original OS. Thus, some users prefer to use "clean", stock Android, without any add-ons or shells; those devices are designed for them.

The largest volume of memory card with which the phone supports. For more information about the cards themselves, see "Memory Card Slot"; here we note that capacious cards often use advanced technologies that are not supported by all devices, and sometimes phones simply do not have enough power to process large amounts of data. Therefore, for the convenience of choosing in our catalog, the maximum supported volume is indicated.

In fact, there are cases when some devices may exceed the claimed characteristics. However, it is worth focusing on official data, because, if officially supported volume is exceeded, normal operation of the card is not guaranteed.

The test results are specified either by a younger model in a line or a particular model, made for a better understanding performance of phone models if you compare phones against these parameters. For example, the 128 GB model has test results, and the 256 GB model has no information on the network, and in both models you will see the same value that will give an understanding of the overall performance of the device. But if the editorial office has information for each model individually, then each model will have its test results filled out, and the model with bigger RAM will have bigger values.

The result shown by the device when passing the AnTuTu Benchmark performance test.

AnTuTu Benchmark is a comprehensive test designed specifically for mobile devices, primarily smartphones and tablets. It checks the efficiency of the processor, memory, graphics and I/O systems, thus providing a fairly visual impression of the capabilities of the system. The better the result, the more points are given at the end. And high-performance by AnTuTu rating are smartphones that score over 750K points

Like any benchmark, this test does not give absolute accuracy: the same device can show different results, usually with deviations within 5 – 7%. These deviations depend on many factors that are not directly related to the system — from the load of the device with third-party programs to the air temperature during testing. So, it is possible to speak about a significant difference between the two models only if the difference in their indicators goes beyond those 5 – 7%.

The result shown by the device when passing the performance test (benchmark) Geekbench.

Geekbench is a specialized benchmark designed for CPUs. Since version 4.0, the test has also been applied to graphics accelerators; towards the end of 2019, the benchmark was released under the number "5". The characteristics of portable gadgets usually provide data specifically for the CPU. During testing, Geekbench simulates the workloads that occur when performing real-world tasks, and takes into account both the capabilities of a single core and the efficiency of multiple cores running simultaneously. Thanks to this, the final results characterize well the capabilities of the processor in everyday use. In addition, the test is cross-platform and allows you to compare the CPUs of different devices (smartphones, tablets, laptops, PCs). The help information only lists the multi-core test values for CPU.

The result shown by the device when passing the 3DMark Gamer's Benchmark performance test.

3DMark is a series of benchmarks originally designed to test the graphics performance of a device; later, these tests were supplemented by checking the capabilities of the processor. Testing is carried out primarily in terms of performance in games (in fact, the benchmark itself is described as “a game without the ability to influence the process”), however, given that modern games can have very high requirements, 3DMark is a fairly visual tool for assessing the overall performance of the system . And since the latest versions of the test are made cross-platform, it also makes it possible to compare devices under different operating systems and even different classes (for example, smartphones with tablets). The more points this or that model received on this test, the more performant it is.

It is worth noting that the results of any benchmark are usually quite approximate, because. they depend on many factors that are not directly related to the system — from the load of the device with third-party programs and ending with the air temperature during testing. The error due to these factors is usually about 5 – 7 %; therefore, it is possible to speak of a significant difference between the two models only if the difference in their indicators goes beyond those 5 – 7%.

The number of individual lenses provided in the module of the main (rear) camera of the device. Specified only if there are several lenses. At the same time, each «eye» has its own sensor and, in fact, is a separate camera; however, they can be used in conjunction, forming one image from data from several lenses, or mutually complementing each other's capabilities. As an illustration of the second case, the following example can be given: when using the zoom, the smartphone can automatically switch from the main optics to the telephoto lens when the magnification selected by the user exceeds a certain threshold.

The simplest version of the main module with several lenses is a dual camera, however, devices with 3 or more rear cameras are becoming more common (in some models, the number of lenses can reach six). Anyway, these cameras usually differ in specifications and perform different functions. So, an ordinary colour camera can be supplemented with a lens for black-and-white shooting, which improves contrast; in some models, lenses with different focal lengths allow you to choose the optimal viewing angle for certain conditions; information from an auxiliary lens (see below) is usually used to adjust the depth of focus on an already finished shot, etc. These details should be clarified separately, but anyway, several lenses mean more shooting options.