How to speed up the work of Xiaomi Redmi 9T: step-by-step instructions with proven methods

Why Xiaomi Redmi 9T is slowing down and what to do about it

Xiaomi Redmi 9T is one of the most popular budget smartphones with a Snapdragon 662 processor and 4-6 GB of RAM. Despite the good characteristics, over time, many users experience slowdowns: applications open for a long time, the MIUI interface “hangs”, and games begin to “fail”, the reasons can be different from overloaded memory to errors in firmware.

In this article, we will discuss 10 proven ways to speed up the Redmi 9T without drastic measures like factory reset. Most methods do not require root rights and are suitable even for beginners. It is important to understand that if the phone began to slow down after 1-2 years of active use, the problem is often in the software "junk" rather than "hardware".

Start with the simplest and safest ways, and then move on to deeper optimization. If you're not sure about your skills, skip sections with ADB or manual settings editing, the first 5 points will give you a noticeable performance boost in 10-15 minutes.

1. Cleaning up cache and junk files

The most common cause of slowdowns is clogged memory. System cache, residual files of deleted applications and temporary data take up space and cause the processor to waste resources on processing them. On the Redmi 9T with 64-128 GB of memory, this is less critical, but even here, cache can reach 5-10 GB.

How to clean:

• 📱 Go to Settings. → Memory. → Clean (the Garbage tab) The system will find the unnecessary files.
• 🧹 For deep cleaning, use the built-in Security app: open it, click Clean and select Deep Clean».
• 🗑️ Remove the cache of individual applications: Settings → Annexes → Select the application → Memory. → Clear the cache.

Please note: Clearing the cache does not delete important data (photos, messages, accounts), but it can reset settings in some applications (for example, in games you will have to reload levels).

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If the cache accumulates quickly after cleaning, check apps like Facebook or TikTok, which actively cache content. Limit background activity in battery settings.

2. Disable animation and visual effects

MIUI is known for its beauty: smooth transitions, animations when opening apps, blur effects, all of which eat up CPU and RAM resources. On the Redmi 9T with its Snapdragon 662, this is especially noticeable.

To speed up the interface:

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 items: Window animation scale → No animation or 0.5x Transition animation scale → No animation or 0.5x Animation duration → Disable

The effect will be noticeable immediately: applications will open faster, and the interface will become more responsive. If you do not like the "sharpness" of the transitions, set a value of 0.5x instead of completely turning off.

3. Optimization of background processes and autoboot

Many apps continue to work in the background even after closing: update content, send notifications, synchronize data. This consumes RAM and battery power. On the Redmi 9T with 4 GB of memory, unnecessary background processes can lead to “hangs”.

How to limit background activity:

• 🔄 Go to Settings. → Annexes → Application management.
• 📵 Select an app (for example, Instagram or VKontakte) → Battery → Limit background activity.
• 🚫 For radical optimization, disable autorun: in the same app menu, select Autorun and deactivate it.

Be careful: disabling auto-runs for messengers (WhatsApp, Telegram) can lead to delays in receiving messages.

4. Update of firmware and system core

Slowdowns can be caused by outdated firmware or errors in the current version of MIUI. Xiaomi regularly releases updates that optimize performance and fix bugs.

1. Go to Settings → About the phone → System update.
2. Click on "Check Updates."
3. If a new version is available, install it (preferably via Wi-Fi, as packages weigh 1.5-3 GB).

If there are no updates, but the phone is slowing down, try reinstalling the current firmware via Recovery:

• Download the official firmware for Redmi 9T (model lime) from MIUI Downloads.
• Rename the file to update.zip and place it in the root of the phone’s memory.
• Go to Settings → About Phone → System Update, click on the three dots in the upper right corner and select “Select firmware file”.

Backup your phone | Charge at least 50% | Connect to stable Wi-Fi | Download firmware for your model (lime) | Do not interrupt the update process-->

Attention! Do not install firmware from third-party developers (castomy ROMs) without experience - this can lead to loss of warranty and "brick" of the device.

5. reset of the partition cache (wipe cache partition)

If cleaning the cache through settings didn’t help, try resetting the partition cache via Recovery.This will delete temporary system files that may slow down but won’t affect your data (photos, apps, settings).

Instructions:

1. Turn off the phone.
2. Press the Power button + Volume up until the MI logo appears.
3. From the Recovery menu, select the language (English / Chinese), then Wipe & Reset → Wipe Cache.
4. Confirm the action and restart the phone.

It takes 2-5 minutes, and after the reboot, the interface will be noticeably faster, especially if you haven't updated your firmware in a long time.

⚠️ Warning: Don't confuse Wipe Cache with Wipe Data! The second option will completely reset the phone to factory settings, deleting all your data.

6. Optimize MIUI with Hidden Settings

MIUI has hidden features that speed up the system, some of which are available through developer mode, others through ADB (Android debugging tool), and let's look at the safe ways without root rights.

Disable MIUI Optimization (for power users only!)

This is a function that makes the interface smooth, but sometimes it actually slows down the system to turn it off.

1. Connect your phone to your PC and install ADB Tools.
2. Enable debugging over USB in the developer settings.
3. Open the command line on PC and type: adb shell settings put global miui_optimization_disabled 1
4. Reboot the phone.

When you turn off optimization, the interface may become less smooth, but the random friezes will disappear. To get it back, run the same 0 command.

7. Transfer applications to a memory card (if supported)

The Redmi 9T supports microSD cards up to 512GB, but not all applications can be migrated to it, but this will help free up internal memory, which will indirectly speed up the system.

How to move applications:

1. Go to Settings → Applications → Application Management.
2. Select an app (like Google Maps or Spotify).
3. Press Warehouse. → Change. → choose SD-map.

Note that porting can slow down an application if the memory card is below UHS-I (U1/U3) and some apps (such as WhatsApp) do not support porting.

⚠️ Warning: Do not transfer system applications or those that work in the background (messaging, antivirus) to the memory card.

8. Alternative launchers and lightweight firmware

If none of the above has worked, consider installing an alternative launcher or switching to lightweight firmware.

Launchers:

• 🚀 Nova Launcher – fast and customizable, without unnecessary animation.
• ⚡ Lawnchair – lightweight launcher with gesture support.
• 📱 Microsoft Launcher – Optimized for Performance.

Installing the launcher does not require root rights and does not affect system files. Just download it from Google Play and install it as the default launcher.

Lightweight firmware:

For advanced users, there is a custom firmware option like LineageOS or Pixel Experience, which lacks the heavy MIUI interface and often works faster.

• Unlock the bootloader (bootloader).
• TWRP Recovery installations.
• Backup of data (risk of loss!)

Installing custom firmware removes the warranty and can cause the phone to fail if you make a mistake. If you are not sure of yourself, you should consult a specialist.

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Alternative launchers are the safest way to speed up the interface without risk to the system. Custom firmware gives a greater performance boost, but requires technical skills.

FAQ: Frequent questions about Redmi 9T acceleration