How to adjust the screen refresh rate (hertzovka) on Xiaomi Redmi Note 9: all ways

Xiaomi Redmi Note 9 is one of the most popular budget smartphones with a display that supports refresh rates up to 60 Hz. However, many users mistakenly believe that their device is capable of running at 90 Hz or even 120 Hz, as flagship models. In this article, we will discuss how to check the current hertz, whether it can be increased, and what MIUI settings affect the smoothness of the screen.

It is important to understand the Redmi Note 9 (model) M2003J15SC for the global market) equipped IPS-It's a fixed-frequency 60 Hz display, and it's a hardware constraint that you can't get around software without the risk of damage to the matrix. MIUI There are hidden parameters that affect visual smoothness - these we will consider.

What is a Hertzovka and why it can not be changed to Redmi Note 9

The refresh rate of the screen (measured in hertz, Hz) shows how many times per second the display updates the image. The higher the value, the smoother the animation.

• 📱 60Hz is the standard for budget smartphones (including the Redmi Note 9).
• 🚀 90/120 Hz – used in flagships (Xiaomi) 12 Pro, Redmi K50).
• ⚡ 144+ Hz – gaming smartphones (Black Shark 5 Pro).

The Redmi Note 9 doesn't physically support a frequency above 60Hz, which is part of the matrix's specifications, and all the instructions for overclocking the hertz through the engineering menu or ADB are myths that can lead to:

• 🔥 Overheating of the display and reducing the service life.
• 🖥️ Artifacts of the image (flickering, stripes).
• ⚠️ Loss of warranty (if traces of interference are found in the service center).

⚠️ Warning: Any attempts to change the sealing via the engineering menu (#4636##) or modified firmware cause hardware damage to the display.In 2023, Xiaomi officially announced that it was blocking such manipulations at the bootloader level.

However, there are legitimate ways to improve smoothness:

1. Optimization of animation in the developer settings.
2. Include the “Improved Rendering” function in MIUI.
3. Adaptive frequency (if supported)

How to check the current hertzovka on Redmi Note 9

Before you try to change anything, make sure your display is actually running at 60Hz.

1. Download the Display Tester app (available on Google Play).
2. Run the Refresh Rate test.
3. Compare the result with the table below:

If the test shows a value other than 60 Hz, the application is likely to be wrong (this happens on budget displays).

adb shell dumpsys display

In the conclusion, find the refresh rate line - there will be an actual value.

Setting up the screen smoothness through MIUI

Although it is impossible to change the hertzock, MIUI 12/13/14 has features that visually improve smoothness:

1. Adaptive frequency (if available):

Go to Settings → Display → Screen refresh rate. On the Redmi Note 9, this item may not be available — that's okay.

1. Optimization of animation:

Activate Developer Mode (click 7 times on the MIUI version in Settings → About Phone), then:

Settings → Additional → For developers → Animation scale (set 0.5x)

1. Improved rendering:

Turn on the option to Improve image quality in Settings → Display. This will add smoothness through software processing.

Activate the Developer Mode|Set the scale of animation on 0.5x|Insert "Improving image quality"|Update MIUI last-minute-->

Can I get a scalp through the engineering menu?

There are often instructions on the web to change the hertz using the code ##4636## or ##36446337##. On the Redmi Note 9, this will not work – the engineering menu simply does not contain such options.

If you do, you'll try:

1. Enter ##4636### in the dialer.
2. Go to the Hardware testing tab.
3. Try to find the Display or Screen item.

You'll probably only see information about resolution (1080×2340) and pixel density (409 PPI). There are no fields to change the hertz, which confirms the hardware limitation.

⚠️ Note: Entering engineering codes on Redmi Note 9 firmware MIUI Global could lead to blocking IMEI, if the device is linked to the operator (e.g., the version for Tele2 Before experimenting, back up! Alternative ways to improve smoothness If you're short on 60 Hz, consider these options: 🎮 Game mode: Enable Settings → Special facilities → It's a turbo game mode, it's going to reduce input delays, but it's not going to change the hertzing. 🔄 Update to MIUI 14: New versions optimize the display. Check the updates in Settings → The phone. → Updating the system. 📱 Smartphone Replacement: If Smoothness Is Critical, Pay Attention to Redmi Note 11 Pro+ (120 Hz? POCO X5 Pro (120 Important: On the Redmi Note 9 It is not possible to programmatically increase the hertzovka higher 60 Hz without replacing the display module with a support 90/120 Hz. The cost of replacing it is comparable to buying a new smartphone. What happens if you install a custom firmware from 90 Hz? Even if you stitch the Redmi Note 9 with custom firmware (like LineageOS or Pixel Experience) with support for 90 Hz, the display will not physically be able to work at this frequency. At best, you will get artifacts, at worst, burnout matrix. The firmware only "cheats" the system by showing false values in tests, but the real frequency remains 60 Hz. Frequent errors in setting up hertz Users often face these problems: Error Reason Solution Test shows 90 Hz, but animation lays False positive software (Display Tester bug) Check through adb shell dumpsys display After resetting the hertz settings" MIUI Reset animation scale in developer mode Screen flickering after changes to the engineering menu Wrong settings Color Mode Reset display settings in Settings → System system → If after experimenting with settings, the screen began to flicker or spontaneously change brightness, perform: fastboot erase config This command will reset all user display settings (an unlocked bootloader is required). 💡To quickly return the standard display settings, go to Settings → Display. → Resetting color profile. This will eliminate flicker caused by incorrect color reproduction settings. FAQ: Answers to popular questions Can you flash the Redmi Note 9 at 90 Hz without changing the display? No. Hertz depends on the hardware capabilities of the matrix, and the Redmi Note 9 has a fixed 60 Hz display. Any firmware that promises 90Hz is a hoax or experimental build that will cause a breakdown. FPS above 60, but the screen still shows 60 Hz? FPS (The screen is different, and the screen updates are different, and the display display is 60 frames per second at most, even if the game is 90. FPS. To see the difference, you need a monitor with a frequency. ≥90Hz. How to roll back changes if the screen flickers after setting up? Reset via Settings → System system → Resetting settings → Reset all settings (without deleting data). If you have any flicker left, go back to the stock firmware through the Mi Flash Tool. Are there any apps that actually increase the hertz? No. All utilities like this are just like this "90Hz Enabler or SetEdit only modify system files, but don't change hardware constraints. They can lead to bootloop. Should you buy a Redmi Note 9 in 2026 if high hertz is important? No. For a smooth interface, it is better to consider the Redmi Note 12 Pro+ (120 Hz) or POCO F5 (120Hz) Redmi Note 9 is suitable only for basic tasks: calls, social networks, easy games. 💡Redmi Note 9 does not physically support hertz above 60 Hz. All "instructions" for overclocking are myth or fraud. The only safe way to improve smoothness is to optimize animation in the video. MIUI and firmware update.