Modern smartphones Xiaomi Redmi line offer users impressive display characteristics, from budget IPS-matrices AMOLED-However, there are often situations where the parameters declared by the manufacturer do not match those displayed in the standard About Phone menu, which may be due to software shells that hide real data, or to the features of the interface rendering. Understanding how to check the screen resolution of the Xiaomi Redmi smartphone is necessary not only for enthusiasts, but also for ordinary users who want to adjust the clarity of fonts or evaluate the quality of content.
In most cases, standard system settings are not enough to get detailed technical information. Display resolution is a key parameter that affects pixel density (PPI) and, as a result, image detail. If you plan to install a specific application that requires a certain screen density, or want to make sure that the gadget you buy meets the specifications of the store, you will need more in-depth diagnostic methods. In this article, we will examine all the available methods, from simple system menus to the use of debugging tools.
It's important to understand that the software resolution that Android sees may be different from the physical resolution of the matrix. Manufacturers often use interface scaling to improve readability on high-density screens. The physical resolution of the Redmi Note 12 Pro matrix is 2400×1080 pixels, but the interface can render in a smaller size to save resources. We'll look at how to get to the truth and get accurate numbers.
Use of built-in MIUI and HyperOS system settings
The most obvious and accessible way to get basic information about the display is through the settings menu of the smartphone itself. However, the interface of the MIUI shell or the new HyperOS often hides technical details behind marketing descriptions. To find standard data, the user needs to go to Settings → About Phone → All settings. Here, the “Resolution” bar usually indicates a standard value, for example, 2400x1080.
The problem with this method is that it shows the logical resolution or default resolution of the system, not the physical limit of the matrix. For many users, this information is enough, but if you are looking for discrepancies or want to know support for specific modes, you will have to dig deeper. In addition, in some regions of the firmware, this line may be missing altogether or be replaced with a description like “Full HD+”.
However, you can change the display density (DPI) through settings, which indirectly affects how the system uses the available pixels. Changing these parameters is available in the developer's advanced settings. Smallest width determines how many interface elements will fit on the screen. Reducing this value will make all elements larger, but it will not change the physical resolution of the matrix.
- 📱 Go to Settings. → About the phone and press 7 times on the "Version" MIUI», activate the developer mode.
- 🔍 In the menu "Additional" find the item "For developers».
- ⚙️ Scroll down to the "Drawing" section and find "Minimum width).
- 📝 Write down the original value before making any changes to return everything back.
⚠️ Warning: Do not set Minimum Width to less than 360 dp or more than 600 dp without needing it, which can cause the keyboard, navigation buttons or the interface elements to be completely removed, which will require resetting.
Verification through engineering menu and hidden codes
A more advanced method that does not require the installation of third-party software is the use of an engineering menu. CIT (This tool was created by Xiaomi engineers to test equipment in the factory and in service centers, and is accessed through the standard Phone application by entering special devices. USSD-This allows you to access the screen diagnostics without superuser rights.
The most common code used to enter the test menu is ##6484## or ##4636#. Once you enter the combination, you will open a list of tests where you need to select the item associated with the display (usually called Display, Color Test or Version). In some firmware versions, detailed information about the resolution can be hidden in the Version or Hardware Info tab.
The advantage of this method is that it shows data that is read directly from the screen controller, rather than being interpreted by the operating system. This is especially useful when checking restored or used devices where the matrix could be replaced with a counterpart with other characteristics.
- 📞 Open the phone application (caller).
- 🔢 Enter the code ##6484## on the dialing keyboard.
- 🧪 On the menu that opens CIT Select "Display" or "Version».
- ℹ️ Search for the Resolution lines, LCD Type or Panel Info.
What do I do if the codes don't work?
Use of specialized applications for diagnostics
The most reliable and convenient way for the average user is to install a specialized application from the Google Play store. Programs like AIDA64, Device Info HW or CPU-Z have access to system configuration files and can read the exact parameters of the display, including physical resolution, pixel density and even matrix type. These applications are free and secure.
Once you install a Device Info HW, you need to go to the Display tab, and here you'll see two important parameters: Native resolution and Current resolution. Native resolution is a physical parameter of your Xiaomi Redmi matrix that can't be changed software-based. Current resolution can be lower if you turn on power saving or one-hand operation mode.
The Density parameter, measured in DPI (dots per inch), shows how many dots per inch of an image. For modern Redmi smartphones, values between 390 and 440 DPI are the norm. A significant deviation from these values may indicate a miscalibration or use of a custom theme that changes the scale of the interface.
| Annex | Accuracy of data | Advertising | Additional functions |
|---|---|---|---|
| Device Info HW | Tall. | Got it (free) | Camera details, sensor details. |
| AIDA64 | Tall. | No. | Information about CPU, GPU, battery |
| CPU-Z | Medium | There is. | Real-time monitoring |
| Screen Test Pro | Low (test only) | There is. | Checking broken pixels |
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When installing diagnostic applications, pay attention to the permissions you request. Screen information usually doesn't require access to contacts, geolocation, or microphone. If the application requires extra rights, you'd better choose an analog.
Accurate data through ADB (for advanced users)
For those who want to get absolutely accurate information without installing unnecessary applications on the smartphone itself, the tool is ideal. ADB (Android Debug Bridge: This method requires connecting your smartphone to your computer via a computer. USB-cable and the presence of a minimum set of drivers. ADB It allows you to send commands directly to the Android system and receive answers in raw form.
Before starting the procedure, you need to activate debugging via USB in the Developer menu. After connecting to your PC and installing Platform Tools, open the command line or terminal in the folder with ADB. Enter the command adb shell wm size. The system will respond with a line of Physical size: 1080x2400. This is the actual physical resolution of your screen.
You can also see the density of the screen by adb shell wm density, which will show the current density in the DPI. The combination of these two commands gives a complete picture. It is important to note that with ADB you can even temporarily change the resolution of the screen by adb shell wm size 1080x1920, but to return to the factory parameters you will need an adb shell wm size reset command.
adb shell wm size
adb shell wm density⚠️ Note: Using the wm size command without reset may cause the interface to be displayed incorrectly after the reset, and the touchscreen may work with bias.
☑️ Preparation for work with ADB
The effect of refresh rate and matrix type on perception
Resolution isn't the only parameter that affects image quality. Redmi owners often face the notion of refresh rate (hertz), 90Hz, 120Hz and even 144Hz screens create the illusion of higher resolution due to the smoothness of objects, but it's worth distinguishing between scanning frequency and the actual number of pixels.
Many AMOLED-Xiaomi's matrixes use Pentile's subpixel arrangement technology, which means that red and blue subpixels can be larger than green or in diamond order. IPS-screens with the same resolution as the full HD+. This is not a marriage, but a feature of the technology of panel production.
Also worth mentioning is the “Memory Extension” feature, or software resolution enhancement, which is sometimes found in custom firmware but is not standard for stock MIUI. Under standard conditions, the system always tends to use native matrix resolution for rendering, scaling the picture only when running old applications that are not optimized for extended screens.
- 🔄 High refresh rate (120 Hz) makes scrolling smoother but doesn't add pixels.
- 🎨 AMOLED Matrices may have lower effective density due to subpixel structure.
- 📱 The elongated format (20:9) requires content adaptation, otherwise black bars may appear.
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Screen refresh rate and resolution are different characteristics. 120 Hz is responsible for the smoothness of animations, and the number of pixels (1080p, 2K) is responsible for the clarity of static image and text.