How to speed up Xiaomi 9T: From System Cleaning to Deep Optimization

Your Xiaomi. 9T (He's a Redmi. K20 In some regions, you're slowing down, hanging up, or slowly opening apps? 2019 yearly 2-3 year of operation begin to "slow down" - the reason for this is clogged memory, background processes and unoptimized settings MIUI. Don’t rush into buying a new smartphone: 90% In some cases, the problem can be solved by software methods.

In this article, we will discuss 10 Proven ways to speed up Xiaomi 9T — From basic (cache cleaning, animation disabling) to advanced (kernel setting, background process restriction) methods tested on current versions. MIUI 14/15 And if you're willing to go further, there's a bonus section at the end about hidden developer settings that Xiaomi doesn't advertise.

1.Diagnostics: Why Xiaomi 9T brake?

Before optimizing a smartphone, you need to understand the source of the lags.Brakes on Xiaomi 9T commonly associated:

• 📱 Overloaded memory – less than 1 GB of free RAM or a clogged drive (especially if left over) < 5GB).
• 🔄 Background processes — MIUI aggressively keeps apps in memory even when they are not in use.
• 🗑️ Trash cache – temporary application files and systems take up gigabytes.
• 🔋 Overheating - Snapdragon 730 in 9T trottling.
• 📲 Older Firmware - New Versions MIUI Often optimize productivity.

To pinpoint the problem precisely:

1. Open Settings → About Phone → MIUI version and check the relevance of the firmware.
2. Run Settings. → Annexes → System status (or use the application) CPU Monitor from Play Market to see CPU and memory load.
3. Check the temperature through Settings → Battery. → Battery status (norm to 40)°C).

If the smartphone slows down when heated, the problem may be in the thermal paste (solved in the service center). If the lags appear after the update, try to roll back to the previous version. MIUI.

2. Cleaning the system: remove garbage and cache

The first step to speed up is to free up space and clean up temporary files. 9T s 64/128 GB of memory garbage accumulates quickly, especially if you actively use social networks, messengers and browser.

How to clean cache and unnecessary files:

1. Go to Settings. → Storage and press Clean (the system will find the garbage itself).
2. Open the Settings. → Annexes → Manage apps, select each of the most commonly used (e.g. Facebook, Telegram) and click Clear cache.
3. Remove Unused Applications: Settings → Annexes → Delete.
4. Use the built-in Optimizer (the broom icon in the notification curtain).

For deep cleaning, you can use third-party utilities like SD Maid or Files by Google, but beware – they can delete important data.

⚠️ Note: Do not clear the cache of system applications (e.g. com.android.systemui) – this can cause interface failures. Also, do not use cleaners like Clean Master – they often delete the desired files and show false warnings.

3. MIUI Optimization: Turning off animation and background processes

MIUI By default, it includes a lot of visuals and background services that eat up resources.

How to remove animation and speed up transitions:

1. Activate Developer Mode: Go to Settings → About Phone and click on MIUI Version 7 times.
2. Back to Settings → Additionally. → For developers.
3. Find the settings: Window animation scale → Disable the animation scale of the transition → Disable the animation duration of the animation → Disable

Limitation of background processes:

• In the same Developer menu, find the Process Limit and select the Maximum 2 process in the background.
• Turn off the Application Switching Animation.
• Turn it on. GPU-acceleration (if disabled).

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If after disabling the animation interface began to “twitch”, return the scale of animation to the value 0.5x — It is a compromise between smoothness and speed.

Another useful trick is to disable unnecessary system services:

1. Go to Settings → Applications → Application Management → All applications.
2. Find and disable (do not delete!): Mi Video (if you do not use) Mi Music Mi Browser (if you use Chrome) Analytics (collect statistics Xiaomi)

4. Battery setup: why savings are slowing down your smartphone

Charge saving functions in MIUI It can be useful when traveling, but in everyday use only interferes with performance.

How to remove unnecessary restrictions:

• 🔋 Go to Settings. → Battery. → Battery mode and select Performance (instead of Balanced or Charge Savings).
• 🚫 Turn off adaptive battery saving in the same menu.
• ⚡ B Settings → Battery. → Power management applications set for frequently used applications (messengers, games) mode No restrictions.

If the smartphone is very warm and slows down when charging, try:

• Use the original power supply unit (18W).
• Turn off Fast Charging in Settings → Battery (if the temperature exceeds 45)°C).
• Do not play games while charging.

5. Firmware update: is it worth switching to MIUI 15?

Xiaomi regularly releases updates that optimize performance. MIUI They are not always stable – sometimes they increase memory consumption or introduce bugs.

How to properly update the firmware:

1. Check the current version in Settings → About Phone → MIUI version.
2. If an update is available, download it through Settings → Updating the system.
3. Before Updating: Make a Backup (Settings) → Additionally. → Backup. Charge the battery to 50% Connect to Wi-Fi (updates weigh more) 1-3 GB).

If after the update, the smartphone began to slow down more:

• 🔄 Make a cache reset via Settings → Updating the system → Click on the icon. ⚙️ → Clear the cache.
• 📱 Perform a reset settings (Settings) → Additionally. → Resetting settings), but it will delete all data.
• 🔙 Reverse to the previous version MIUI Mi Flash Tool (requires an unlocked bootloader).

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If you're Xiaomi. 9T work MIUI 12 or older, update to MIUI 14/15 It can give you performance gains by optimizing the Android kernel, but if the smartphone is already slowing down, it's not going to work. MIUI 13, It is better to stay on this version or reset after the upgrade.

6 Advanced methods: overclocking and optimization of the core

If the basic methods didn't work, you can try deep optimization through hidden settings, which don't require root, but they do require caution.

Optimization of the kernel and scheduler:

1. Activate Developer Mode (see Section 3).
2. Go to Settings. → Additionally. → For developers and find: Limiting background processes → Maximum 2 process. Forced use GPU-acceleration → On-board. USB → Includes (required for the next steps).

Kernel Adiutor

Performance Control

• I/O scheduler: Cfq or deadline.
• Minimum frequency CPU: 403 MHz (300 MHz default).
• Maximum frequency GPU: 825 MHz (standard for Adreno 618 in) 9T).

Optimization through ADB (rootless):

Connect your smartphone to your PC, turn on debugging USB and execute commands:

adb shell settings put global window_animation_scale 0


adb shell settings put global transition_animation_scale 0




adb shell settings put global animator_duration_scale 0




adb shell pm disable-user --user 0 com.miui.analytics

⚠️ Warning: Changes in core parameters can cause the battery to overheat or discharge quickly. If the smartphone warms up more after settings, return the settings to standard. CPU above 2.2 GHz – this can cause unstable performance.

For lovers of experiments, there is another method - disconnection. MIUI Optimization (removes system limitations but can cause bugs):

adb shell pm disable-user --user 0 com.miui.powerkeeper


adb shell pm disable-user --user 0 com.xiaomi.mipush.sdk

7. Alternative firmware: should you switch to caste?

If standard methods don't help, you might consider installing custom firmware. 9T popular:

• 📱 LineageOS – pure Android without unnecessary services.
• ⚡ Pixel Experience – firmware with chips from Google Pixel.
• 🔧 ArrowOS – Balance between performance and functionality.
• 🚀 Corvus OS — optimized for gaming.

The advantages of custom firmware:

• Lack of advertising and unnecessary services MIUI.
• More recent versions of Android (for example, Android 14 instead of 11).
• Improved performance due to an optimized core.

Cons:

• 🔧 Requires unlocking the bootloader (erases all data).
• 📵 Possible problems with the camera, NFC mobile.
• 🔄 No official updates OTA (You will have to update manually).

How to install custom firmware:

1. Unlock the bootloader through Mi Unlock Tool (you need a Xiaomi account and wait 7 days).
2. Install. TWRP Recovery (instructions are available on the 4PDA or XDA Developers).
3. Download the firmware (for example, with XDA) And transfer it to your smartphone.
4. Boot in. TWRP (power-button + Volume up) and flash the firmware.

FAQ: Frequent questions about Xiaomi acceleration 9T