The smartphone market is oversaturated with specs, but it is the frequency of screen refresh has become one of the main criteria for comfort of use of the gadget. Owners of Xiaomi, Redmi and POCO devices often wonder about the real performance of their displays, especially when the manufacturer’s claimed 120 Hz in everyday use seems not obvious. Understanding how your display works allows you not only to satisfy curiosity, but also to optimize the system.
The refresh rate measured in Hertz (Hz) shows how many times per second the image on the screen is updated. Standard 60 Hz means 60 frames per second, while modern flagship AMOLED and IPS matrixes from Xiaomi are capable of reaching 90, 120 and even 144 Hz. However, the "iron" capacity of the matrix does not always mean that it is running at a maximum right now - this is where software optimization and energy saving adjustments come into play.
In this article, we will look at all the available ways to check the current and maximum hertz on Xiaomi phones. We will look at built-in diagnostics, hidden engineering codes and specialized software that will show accurate data in real time. You will learn to distinguish marketing tricks from real indicators and understand why in moments the system forcibly reduces frame rates.
Why Know the Real Hertz of Your Display
Many users buy smartphones with a 120Hz mark, expecting absolute smoothness of the interface, but are faced with the fact that in some applications the screen is slower. This is due to adaptive frequency technology, which dynamically changes the number of updates depending on the content. Knowing the real metrics helps to understand how effective the algorithm of power saving your Xiaomi works.
In competitive shooters, every millisecond of input lag matters. If you notice friezes or uneven animations, checking the current frame rate will help identify the problem: either the processor is not coping or the system artificially limits the display to save battery power.
Also worth considering is the difference between the sensor sampling rate and the image refresh rate: the first is the speed of the touch response, the second is the smoothness of the image. On top Xiaomi models, these figures can reach 240 Hz and 480 Hz, respectively, but they work independently of each other.
Checking through standard MIUI and HyperOS settings
The easiest and safest way to find out the frequency you support is to look at the standard operating system settings menu. Xiaomi provides basic access to these settings, although it doesn't always show the current value in real time.
The path may vary slightly depending on the shell version (MIUI 12/13/14 or the new HyperOS). You need to go to the Screen or Display section. In some firmware, this item is hidden inside the submenu Additional. Look for a line called Update Frequency or Refresh Rate.
You'll see the options available here, usually two or three: Default (or Auto), 60 Hz, and Maximum (or 120 Hz/144 Hz), and the default option activates a smart algorithm that decides when to increase the hertz, and if you choose the maximum value, the screen will run at its limit all the time, which will increase the energy consumption.
☑️ Setting up maximum smoothness
⚠️ Attention: Constant operation at maximum frequency (e.g, 120 Hz) can reduce the battery life of the device on 15-20%. Use this mode only if you are critically important to the maximum smoothness of the interface.
Using an engineering menu for accurate diagnosis
For a deeper analysis that doesn't require third-party software, you can use Xiaomi's hidden engineering menu, which is designed for developers and service centers, so it displays technical parameters in a pure form. To log in, open the Phone app and type ##6484##.
Once you enter the code, the CIT (Customer Integration Test) menu will open. You will need to find a item associated with the display in the list of tests. It can be called Display, Screen or have a number, such as Item 13 (the number can change in different versions of the firmware), inside the test, often displays technical information about the connected panel.
However, newer versions of MIUI and HyperOS may restrict access to full real-time display of the hertz in CIT, so if you only see color bars or touchpad checks on the test menu, it's not informative for your model, so you should switch to specialized applications.
What if the code doesn't work?
Third-party applications for real-time monitoring
The most accurate data on how much hertz the screen is giving out right now is only available through third-party software. These apps read data from the system sensor and output it as a frame counter (FPS Counter). One of the most popular and reliable tools is the Device Info HW or Screen Test application.
Once you install the app, run it and find the partition associated with Display or Screen. It will specify the Refresh Rate option. It is important to understand that many applications only show the maximum supported frequency, not the current one. To track dynamic change (when the hertz jumps from 10 to 120 Hz), you need applications with the overlay function (floating window).
Use applications like FPS Meter or Refresh Rate Checker, which create a translucent window on top of all programs where numbers run in real time, and this is the best way to test how the system behaves when you scroll through social media, play games, or watch videos, and you can see how dramatically the values drop in a static image to save energy.
| Method of verification | Accuracy of data | Difficulty | Do you need a Root? |
|---|---|---|---|
| MIUI/HyperOS settings | Low (mode only) | Very easy. | No. |
| Engineering Menu (CIT) | Average (technical information) | Easy. | No. |
| Annexes (Device Info) | High (max. value) | Easy. | No. |
| Overlay annexes | Maximum (real-time) | Middle-Average | No. |
| ADB team | Maximum (systemic) | Hardly. | No (PC needed) |
Checking through a computer and ADB-team
For advanced users who want to get raw data directly from the system without installing suspicious applications, there is a method using debugging. ADB (Android Debug Bridge. This method requires connecting the smartphone to the computer via USB-cable and availability of installed Xiaomi driver USB Driver on PC.
First, activate Developer Mode. To do this, go to Settings → About Phone and quickly press 7 times on MIUI Version (or OS Version). Then, in advanced settings, turn on USB Debugging. Connect your phone to your PC and allow debugging on your smartphone screen.
Open the command line on your computer in the ADB folder and enter the following command to output display information:
adb shell dumpsys SurfaceFlinger --display-id=0In the lead, look for lines that contain compositionToPresent or refreshRate. It will indicate the current value in Hertz. You can also use the command adb shell wm size and adb shell wm density, although they are more about resolution, but in the logs SurfaceFlinger always see the current frequency of updates matrix.
💡
When connecting over ADB, always use the original cable or high-quality analogue with data support. Cheap “charging only” cables will not allow the computer to see the smartphone.
Why the scalp may not reach its stated maximum
Even if you've twisted the settings to the maximum, you may not see the coveted 120Hz in certain scenarios. This is normal for modern systems. First, many applications (especially video services like YouTube or Netflix) block high frequency, since content is shot at 24, 30 or 60 frames per second. Forced interpolation up to 120Hz can cause image artifacts.
Second, optimization is important: not all mobile games support 120 FPS. If the game is limited to 60 frames, the screen will not be physically updated more often, even if the matrix allows.
Third, there are temperature limits: If Xiaomi's processor heats up above a certain point, the system trottlit (reduces performance) not only does it have to be a hotter and hotter. CPU, But also the refresh rate of the display to prevent overheating and reduce power consumption, and it's a defense mechanism that you can't get around without software risk to hardware.
⚠️ Warning: Do not attempt to unlock hidden frequencies (such as 165Hz on a 144Hz screen) through modified configurations.This can lead to unstable touchscreen operation, the appearance of artifacts ("broken" pixels) and the complete failure of the display plume.
💡
The actual hertzovka always depends on three factors: the physical capability of the matrix, the optimization of a particular application, and the temperature of the processor.
Technology Comparison: AMOLED vs. IPS in the context of Hertzov
Xiaomi devices use two main types of matrices, and they implement high frequency in different ways. IPS-screens, which are often found in the budget and mid-range segment (Redmi Note series), usually have a fixed frequency or step-shift (60/90/120 They're more honest with the numbers, but they're consuming more power at higher frequencies.
AMOLED matrices (Xiaomi, Redmi K, POCO F series) use LTPO or LTPS technology. This allows them to change the refresh rate over a very wide range, for example, from 1 Hz to 120 Hz, in increments of 1 Hz. When you look at a static picture, the hertz drops to a minimum, and when scrolled, it skyrockets. This creates the illusion of constant smoothness at minimal battery consumption.
It is important for users to understand that scrolling “twistle” is sometimes noticeable on AMOLED screens because of this adaptability, whereas IPS can give a more “wooden” but predictable feel, the choice between the two is a trade-off between color saturation/savings and response stability.