How to change the hertz on Xiaomi Redmi Note 9 Pro

Modern smartphones have long ceased to be just devices for calls, turning into powerful multimedia centers, where image quality plays a key role. Owners of the popular model Redmi Note 9 Pro often wonder whether it is possible to improve the smoothness of the interface, since the standard refresh rate of the screen is 60 Hz. Many users familiar with flagship models know that higher hertz makes animations more pleasant and responsive, so the desire to squeeze the maximum from your device is understandable.

However, it is worth noting an important technical nuance: the hardware content of the display in the Xiaomi Redmi Note 9 Pro is physically limited to 60 Hz. This means that it is impossible to programmatically “convert” the screen to 90 or 120 Hz if the matrix itself does not support such modes of operation. However, there are ways to optimize the response of the touchscreen and change some hidden rendering parameters that can subjectively improve the perception of the speed of the interface.

In this guide, we will discuss all available customization methods, including working with engineering menus and third-party utilities. It is important to understand the difference between real change in the scan frequency and optimization of the system response. We will look at safe ways and warn about the risks associated with tampering with system files. Careful study of the material will help to avoid errors that can lead to unstable operation of the gadget.

Technical limitations of the Redmi Note 9 Pro matrix

Before you start any manipulation, you need to be clear about the physical limitations of your device.The screen installed in the Redmi Note 9 Pro is an IPS LCD type and has a native refresh rate of 60 Hz. This means that the image on the screen is updated 60 times per second. No software crutches, engineering codes or root rights can make the pixels switch faster than the physical structure of the matrix and the display controller allow.

Trying to find a 90Hz or 120Hz option for this model in the developer settings is doomed to failure, because the display drivers simply do not contain such profiles. Often users confuse the frequency of the touch screen with the frequency of the screen refresh rate. The first affects the speed of the reaction to touch, the second affects the smoothness of the picture. In Xiaomi, you can sometimes find optimizations for touch screen, but not for hertzov.

⚠️ Warning: Installing third-party applications from unreliable sources that promise to “unlock 90Hz” on 60Hz devices may result in malware installation.

There is a myth that by using ADB-You can activate hidden modes of the display. In the case of the Snapdragon processor. 720G And the specific matrix used in the Note 9 Pro, such modes are simply not in the firmware, so all further actions will be aimed at maximizing the existing 60 Hz and improving the responsiveness of the system.

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The physical refresh rate of the screen (60 Hz) on the Redmi Note 9 Pro cannot be increased programmatically, since this is a limitation of the hardware part of the matrix.

Set up developer parameters to optimize

Although you can't change the hertz, you can adjust the rendering options of the GUI to make the device seem faster. You need to activate the developer menu. Go to Settings → About phone and quickly click 7 times on the MIUI version. Once the notification that you have become a developer, a new menu will open.

In Advanced Settings → For developers, we're interested in a few key points: Find the Drawing or Hardware Acceleration unit. Here you can zoom in on animation. The standard value is usually 1x. Changing it to 0.5x will visually speed up window openings and transitions, creating the illusion of a higher hertz.

• 📱 The scale of window animation: Set the value 0.5x speed up application opening.
• 🔄 Transition animation scale: Decrease to 0.5x Switch between screens instantly.
• ⏳ Duration of animation: It is also recommended to reduce to 0.5x.

Another important setting is to force full-screen mode to be enabled or change the DPI (screen width). Changing the DPI in Minimum Width (usually 392 or 411 dp by default) can make the interface denser and more informative, which also affects speed perception. However, be careful: too high a value can make text unreadable.

Using the CIT Engineering Menu for Diagnostics

Xiaomi smartphones have a hidden engineering menu designed to test hardware, which you can access through a special code in the Phone app. Dial the combination ##6484#. If the code doesn't work, maybe your firmware version or region is blocking this access, then you will have to use third-party applications like "CIT" from Google Play.

You can check the display on the CIT menu, but you can't change the frequency. Select Version or Single Item Test, then look for LCID (Touch) tests, and this shows the current mode of the panel, and if you see only 60Hz, you can't see any other modes, and this confirms the hardware limitation.

Some users are trying to find items like "Refresh Rate" or "Frame Rate" in the engineering menu, and there are no such switches in the global firmware versions for this model, and they are typical of the flagship series with AMOLED screens, where support for 90/120 Hz is initially laid down, but hidden in different regions.

Modification through ADB and system commands

For advanced users who still want to experiment with the display settings, there is an ADB (Android Debug Bridge) toolkit that can send commands to the system without bypassing the standard settings menu. First, you need to include USB debugging in the developer menu and connect the smartphone to the computer.

One command that enthusiasts often seek is a command to change resolution or density, which indirectly affects the load on the GPU and can improve FPS in games.

adb shell wm density 320

This command will change the density of dots per inch. The standard value for the Redmi Note 9 Pro is usually 392-411. Reducing this value will increase the amount of content displayed, but make elements smaller.

There is also a myth about the setprop team. debug.sf.enable_gl_triple_buffering, It's supposed to speed up rendering. On modern versions of Android (10, 11, 12, 13) This setting is often ignored by the system or can cause image artifacts.

⚠️ Note: Introduce incorrect commands through ADB It can cause a "boot loop" or an interface failure. Always have a computer with a computer installed. ADB rollback.

Third-party apps and Game Turbo

The Game Turbo (or Game Center) game mode built into the MIUI shell provides some tools to optimize performance. While it doesn't change the screen's hertz, it can redistribute CPU and RAM resources to an active application, helping to achieve a stable 60 FPS in games, which is critical for shooters and racing.

In Game Turbo settings, you can find options to improve the sensor response. For the Redmi Note 9 Pro, it is the closest analogue of "increased hertz" available to the user. Increased sensitivity of the touch screen in game mode makes control more accurate and faster, compensating for the lack of high refresh rates.

• 🎮 Performance mode: Activates maximum processor frequencies.
• 👆 Increased response: Increases sensitivity of the touch area.
• 💾 Memory Clearing: Frees up RAM before starting the game.

There are also apps from Google Play, like Set Edit (requires ADB rights to set up) or launchers, and launchers like Nova Launcher or Lawnchair have their own animation settings that can be smoother than standard ones, creating the effect of a more expensive and faster device without deep interference.

Influence of custom firmware and kernels

The most radical way to try to change display behavior is to install custom firmware (Custom ROM) or a special core (Custom Kernel).The XDA community often releases modifications for popular models. However, even in custom cores for the Redmi Note 9 Pro (codename curtana), support for 90 Hz is rarely found unless it was laid down by the matrix manufacturer.

However, custom cores can offer improved touch screen drivers that make sensors more responsive. Cores labeled "Touch Boost" or "High Sensitivity" can significantly improve the experience, but installing such components requires unlocking the bootloader, which erases all data and disrupts banking applications (though this is often necessary).

The process of unlocking a bootloader in Xiaomi requires a wait of 7 to 168 hours after submitting an application in Mi Unlock. This is a mandatory security procedure. Once unlocked, you can install TWRP Recovery and flash the modified kernel. But remember, this is the way for power users.

⚠️ Warning: Installing a custom core or firmware will void the warranty. Wrong firmware can turn a smartphone into a brick, the recovery of which is possible only through paid services (Mi Flash Pro, EDL mode).

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Before any major modification, make a full backup of your data via Mi Cloud or locally on your PC. Losing photos and contacts is too high a price to pay for experiments.

Practical Tips for Improving Visual Experience

Since you can't physically lift the hertz above 60Hz on the Redmi Note 9 Pro, you should focus on making the 60Hz available work perfectly. The first step is to eliminate heavy live wallpaper and widgets that are constantly updated in the background. They put a strain on the GPU, causing micro-freezes that are mistaken for low hertz.

The second tip is to use a dark theme. On IPS matrices, this doesn't save charge as much as on AMOLED, but black on quality IPS panels looks deeper, and interface contrast in a dark MIUI theme is often subjectively perceived as clearer and faster. It's also recommended to disable Virtual RAM if you have a version with 6 GB of RAM, since using fast internal UFS 2.1 memory is more effective than slow virtual memory.

Regular cleaning of storage also plays a role: If more than 85-90% of internal memory is filled, write and read speeds drop, causing interface lags. Keep at least 10-15 GB of space free for the system to work comfortably.