Modern Xiaomi and Redmi smartphones are no longer just callers, becoming powerful multimedia centers where image quality is crucial. One of the key parameters that affects interface smoothness and gaming comfort is the frequency of screen refresh, or simply hertzovka. Many users buy flagship models waiting for a crystal clear picture, but do not know how to check whether their display is working at full power or the system limits it in order to save energy.
Understanding how to learn the screen hertz of a Xiaomi phone is not only necessary for enthusiasts, but also for ordinary users who want to get the most out of their device. Standard 60 Hz may seem like the norm after button phones, but once you try 90, 120 or even 144 Hz, it will be almost impossible to go back. In this article, we will discuss in detail the software and hardware methods of checking the current frequency, and also find out why your phone may not give out the characteristics claimed by the manufacturer.
It is important to note that many modern Xiaomi panels have adaptive refresh rates that dynamically vary from 1 to 120 Hz depending on the content on the screen. So static testing can give different results at different times. We will look at ways to see the real number at a particular time, as well as methods of forced fixation of high hertz for games.
Check through the standard menu settings MIUI and HyperOS
The most obvious and safe way to know the supported refresh rate is to look at the shell system settings. Xiaomi, in its MIUI firmware and the new HyperOS, provides basic control over this setting, although it hides the exact numbers in some cases. You first have to go to Settings, then select Screen or Display. Depending on the Android version and device model, the path may be slightly different, but the logic remains the same.
If your smartphone supports high frequencies, there will be several options offered here: usually "Default" (or "Auto"), "60 Hz" and "120 Hz" (or 90/144 Hz). Selecting a specific value will force the matrix to a given mode, which immediately visually changes the smoothness of the animations. However, this method only shows the maximum available modes, but does not display the current working frequency in real time.
⚠️ Warning: Forced maximum hertz (e.g. 120Hz) significantly increases battery consumption. Use this mode only when smoothness is important, not autonomy.
It’s also worth mentioning that some Redmi or POCO budget models may not have this option, which automatically means fixed 60Hz. At the same time, Xiaomi’s flagship series and gaming POCO often have hidden modes that aren’t displayed in the standard menu, but are available through engineering utilities.
Using the CIT Engineering Menu for Diagnostics
A deeper level of verification is the CIT (Customer Integration Test) engineering menu that is built into every Xiaomi smartphone.This tool is designed for factory diagnostics and allows you to see the technical parameters of the display, including its native frequency. To get there, open the Phone app and type in the combination ##64663##. If the code is not working, it may be disabled by the operator or firmware, then you can try logging in through the Settings → About Phone → Kernel version (five quick presses).
The list of tests that you're going to open, you're going to find a item that's associated with the display, which can be called Display, Color Test, or Version. Go inside, you'll see the technical information about the panel you're connected to, and it's often the matrix model and the specifications that you're going to see, and it's the engineering menu that you can see the real name of the matrix, so you can go through the specifications on the Internet and find out the exact native hertz, even if the software limits it.
Some versions CIT-The menus allow you to switch screen modes to check for artifacts, and be careful that changing unknown parameters can lead to incorrect display of colors or temporary disappearance of the image. If you are not sure of your actions, it is better to just count the information and exit by clicking the “Back” or “Home” button".
☑️ Checking in CIT-menu
The engineering menu is a powerful tool, but it gives static information about hardware, not the current state of the system. For example, you can know that the screen is physically capable of 120 Hz, but you can't see if it's running 60 Hz now because of the power saving on. Dynamic monitoring will require other methods.
Real-time monitoring through Developer Options
For those who want to see the Hertz number directly on the screen while using a smartphone, there is a built-in debugging feature that allows you to display the current refresh rate in real time. To activate this feature, you first need to unlock the developer menu: go to Settings → About Phone and quickly click 7 times on the MIUI Version (or OS Version).
Once the "You've Been a Developer" notification appears, go back to the main settings menu, select Settings → For Developers. In this long list, find the option to Show refresh rate. Activating this slider will display green numbers showing the current hertz in the upper left corner of the screen.
Now you can see how the value changes: when you flip through your social media feed, it jumps to a maximum (for example, 120), and when you read text or watch video, it can drop to 30 or 60 Hz. This is a great way to understand how adaptive synchronization works for your device. If the numbers do not change and are on 60 even on the menu, then the main settings of the screen have chosen the mode of energy saving.
| Parameter | Description | Where to find out. |
|---|---|---|
| 60 Hz | Standard frequency, saves battery | Settings → Screen |
| 90/120 Hz | High smoothness, requires energy | Settings → Screen |
| Refresh Rate | Current frequency indicator | For developers |
| CIT Code | Iron check code | Caller (#64663##) |
Why does the Hertzovka fall in games?
Third-party applications for detailed information
If built-in tools are not enough, specialized applications from the Google Play Store come to the rescue, with Device Info HW or AIDA64 being the leader in this area, which reads data directly from device drivers and provides detailed information about the display, including supported refresh rate modes, pixel density and matrix type.
In the Device Info HW app, you need to go to the Screen tab, which will list all the modes supported. For example, you can see the lines: 1080x2400 @ 60Hz, 1080x2400 @ 90Hz, 1080x2400 @ 120Hz. This confirms that the hardware of the phone physically supports these frequencies, even if the system hides them.
Another useful tool is the Refresh Rate Checker, which is designed specifically for smoothness testing and can show how stable the high hertz is, but it's worth remembering that third-party applications don't always have access to the manufacturer's system limitations, so their data can be theoretical rather than factual.
Forced change of hertzovka through ADB
For advanced users who want to bypass the software limitations of MIUI, there is a method of using the Android debugging bridge (ADB), which allows you to force the update rate, even if this option is not on the menu, this will require a computer, a USB cable and enabled debugging over USB in the developer menu.
When you connect your phone to your PC, you need to type a command into the terminal (on your computer), you need to get a list of available modes first, but it's often easier to try setting the desired value right away.
adb shell wm size 1080x2400
adb shell wm density 440However, to change the refresh rate, the command may vary depending on the version of Android. On Android 11/12/13, a command is often used:
adb shell settings put system peak_refresh_rate 120.0
adb shell settings put system min_refresh_rate 120.0⚠️ Attention: Use of teams ADB It can cause an unstable interface or a "boot loop" if the wrong values are specified.
This method is especially relevant for owners. POCO, Those who want to lock in 120Hz in games where the default is 60Hz, but be prepared for the fact that after the reboot the settings may reset, and the procedure will have to be repeated. FPS regardless of the system settings.
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Before using ADB commands, be sure to back up important data. Errors in the display system settings can make the image unreadable, and it will be difficult to restore access without resetting.
Table of supported frequencies in popular Xiaomi models
Not all Xiaomi smartphones are the same. Different series of devices are equipped with different matrices. To avoid you having to guess, we have prepared a summary table with typical values for different lines. Remember that even within the same model there may be different shipments of screens from different manufacturers (Samsung, TCL, Huaxing), but the declared frequency usually remains the same.
| Series of devices | Typical hertzovka | Type of matrix | Features |
|---|---|---|---|
| Xiaomi Flagman (13, 14 Pro) | 120 Hz (LTPO) | AMOLED | Adaptive 1-120 Hz |
| POCO F / X series | 120/144Hz | IPS / AMOLED | Playing point, often 144Hz |
| Redmi Note (Pro/Pro+) | 90 / 120 Hz | AMOLED | Depends on the year of issue. |
| Budget Redmi (A/C series) | 60/90 Hz | IPS | Frequently fixed 60 Hz |
As you can see from the table, flagship devices almost always have adaptive frequency, which is the gold standard. Budget models often sacrifice this parameter to reduce the price. If you choose a phone specifically for games, pay attention to the POCO bar, where 144Hz panels are often found, which gives a tangible advantage in shooters.
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Having a high hertz in the performance does not guarantee its performance in all applications, system limitations and optimization of games play a crucial role.