Screen refresh rates (hertz) are a key parameter that affects image smoothness, interface responsiveness, and even smartphone battery life. Xiaomi, Redmi, and POCO can range from the standard 60Hz to 144Hz in flagship models. But how do you know exactly what frequency is installed on your device? Especially if the manufacturer does not specify it in specs or you suspect that the smartphone is not working at the maximum settings.
In this article, we'll look at all the ways you can check, from standard MIUI settings to hidden engineering menus and third-party apps, how to tell the difference between the real hertz and the stated one, why a smartphone can automatically lower the frequency, and what to do if the parameter doesn't meet expectations, and how to turn on the adaptive frequency if your model supports it, but the function is disabled by default.
1. Verification through MIUI settings (the easiest way)
Most modern Xiaomi smartphones allow you to view and change the refresh rate of the screen right in the settings menu. This method works on devices with MIUI 12 and later, including the Redmi Note 10 Pro, POCO F4, Xiaomi 12T and others.
Here's how to do it:
- 📱 Open the Settings app (cog icon on the home screen).
- 🔍 Go to the Screen section (or Display in some firmware).
- 🔄 Find the screen refresh rate (may be called Adaptive Frequency or Hertsovka).
- 📊 The current value will be displayed here (e.g. 60 Hz, 90 Hz, 120 Hz).
If there is no such item on your menu, it could mean:
- ❌ Your smartphone doesn’t support frequency change (e.g., budget models like Redmi). 9A fixed at 60 Hz).
- ⚙️ The function is hidden by the manufacturer (often found in regional firmware).
- 🔄 You have an outdated version. MIUI — upgrade the system.
⚠️ Note: Some models (e.g. Xiaomi) 11T Pro) adaptive frequency is switched on separately if you only see fixed values (60 Hz/120 Hz), check for the Adaptive Frequency switch in the same menu.
2.Use of hidden engineering menu (for advanced)
If the standard settings don’t show frequency or you doubt their validity, you can look into the engineering menu of the smartphone. This method works on most Xiaomi devices, but you need to be careful — do not change other parameters so as not to disrupt the system.
Instructions:
- Open the phone app and enter the combination: ##4636##
- In the menu that opens, select Phone Information (or Testing in some versions).
- Scroll down to the Refresh rate block – the current frequency in hertz will be indicated here.
Alternative way (for models with Qualcomm Snapdragon):
- 🔧 Enter in the phone keyboard: ##2255##
- 📱 Go to the Hardware Info tab → Display.
- 🔍 Find the Refresh Rate or Panel Refresh Rate.
⚠️ Note: Some firmware may have the engineering menu blocked. If nothing happens after you enter the code, your smartphone doesn't support this method. Don't try to enter other service codes - this can cause malfunctions.
What to do if the engineering menu is not opened?
3. Third-party applications for accurate diagnostics
If built-in methods don't work or you want more information, use specialized applications that not only show the current frequency, but also help to test the stability of the screen.
Top.-3 tested:
| Annex | Functions | Link (Google Play) |
|---|---|---|
| Display Tester | Shows real frequency, tests for artifacts, checks color reproduction | Download |
| Screen Refresh Rate Tester | Measures the actual hertzovka in real time, compares with the claimed | Download |
| CPU-Z | Shows screen specifications, including supported frequencies | Download |
How to use Display Tester:
- 📥 Install and open the application.
- 🔍 Go to the Refresh Rate tab.
- 📊 The screen will display the current frequency (for example, 89.95 Hz is the norm for 90 Hz, taking into account the error).
- 🔄 To check for adaptability, turn on screen scrolling – the frequency should change in real time.
⚠️ Note: Some apps may show inaccurate data on smartphones with LTPO-In this case, the frequency can float from 1 Hz to 120 Hz depending on the content.
💡
If the app shows a frequency below the stated (for example, 48 Hz instead of 60 Hz), try to turn off the power saving mode - it can forcefully reduce the hertz.
4.Apply through ADB (for technically savvy)
If you are familiar with USB debugging, you can find out the screen frequency through the ADB command. This method is suitable for all Xiaomi models, but requires a connection to a computer.
Step-by-step:
- 🖥️ Install. ADB Tools on PC.
- 📱 Enable Developer Mode on Smartphone: Go to Settings → About the phone. Press 7 times on the version. MIUI. Back to Settings → Additionally. → For developers, activate debugging by USB.
🔌 Connect your smartphone to your PC and confirm the debugging permission.
adb shell dumpsys displayrefresh rate
current refresh rate
Example output for POCO F3 with a frequency of 120 Hz:
DisplayDeviceInfo{
...
current refresh rate: 120.000004 Hz
...
}Install ADB Tools on PC| Enable developer mode on Xiaomi| Connect phone over USB (original cable)| Allow debugging on smartphone screen | Open command line on behalf of administrator-->
5. How to find out the maximum frequency supported
Sometimes your smartphone is running at a lower frequency (e.g., 60 Hz instead of 120 Hz), although it supports more hardware. To find out what your screen is really capable of, use one of the ways:
Method 1: Official specifications
- 🌍 Go to the Xiaomi website or POCO.
- 🔍 Find your model in the Specifications section.
- 📊 The maximum frequency will be specified in the Display block (for example, AMOLED, 120 Hz, HDR10+).
Method 2: DevCheck Appendix
- 📥 Install DevCheck from Google Play.
- 🔧 Open the Hardware tab → Display.
- 📊 Refresh rates will list all supported values (e.g. 60, 90, 120 Hz).
Method 3: Firmware analysis
If you use custom firmware (like LineageOS or Pixel Experience), the maximum frequency may be limited to the kernel.
- 📄 Go to the firmware settings (usually in the Display settings menu).
- 🔍 See what options are available to choose from.
- 💡 If the maximum frequency is lower than the stated one (for example, 90 Hz instead of 120 Hz), then the firmware does not support it.
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If your smartphone supports 120 Hz, but only 60 Hz is available in the settings, most likely, power saving mode is activated or regional firmware is installed with restrictions.
6 Why a smartphone can show the wrong frequency
Sometimes the actual refresh rate of the screen does not match the stated settings, and let's look at the main reasons and ways to fix them.
Reason 1: Adaptive frequency
Many Xiaomi models (e.g. Xiaomi 12 Pro, Redmi K50) use LTPO or AdaptiveSync technology, which automatically adjusts the hertz from 1Hz to 120Hz depending on the content.
- 📱 Open the frequency checker app (e.g. Screen Refresh Rate Tester).
- 🔄 Scroll the screen up and down - the frequency should jump to the maximum.
- 📄 Stop scrolling - after 1-2 seconds, the hertz will fall to 60 Hz or below.
Reason 2: Energy saving regime
Power Saving or Ultra Mode is forced to reduce the frequency to 60 Hz, even if the screen supports more, to return maximum hertz:
- 🔋 Go to Settings. → Battery.
- ⚡ Turn off energy saving or ultra-mode.
- 🔄 Reboot your smartphone.
Reason 3: Firmware restrictions
Some regional firmware (e.g., India or China) can artificially limit frequency.
- 🌐 Install a global firmware through MIUI bootloader.
- 🔧 Use XiaomiTool to unlock hidden features.
- ⚠️ Note that flashing can lead to loss of warranty and data on the device.
7. Frequent mistakes and how to avoid them
When checking the screen frequency, users often encounter typical problems. Here's how to get around them:
Error 1: App shows 0 Hz or error
This happens if:
- 📵 The application does not have rights to access system information.
- 🔄 The screen is off or locked.
- 📱 The device uses non-standard resolution (for example, through the ADB).
Solution: Restart the application, unlock the screen, and check the permission to access Settings.
Error 2: Frequency floats even at a fixed value
On LTPO screens (like the Xiaomi 13 Pro), the frequency can change even at the selected 60 Hz or 120 Hz. This is normal — the technology optimizes power consumption.
- 🔧 Go to Settings. → Screen. → Adaptive frequency.
- ❌ Turn off the option (if available).
Error 3: After the MIUI update, the frequency reset
Sometimes, after updating the firmware, the smartphone resets the screen settings to return the previous settings:
- 🔄 Go to Settings. → Screen. → Frequency of update.
- 📊 Select the desired value manually.
- 🔋 Check if the energy saving mode is activated.
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If after updating MIUI missing item with frequency settings, try to reset the screen settings to factory: Settings → System → Reset settings → Reset screen settings.