How to speed up the Xiaomi Redmi 9T phone: a step-by-step guide

Xiaomi Redmi 9T is a popular smartphone with a great price/quality ratio, but over time even it begins to slow down. The reasons can be different from overloaded memory to outdated firmware. In this article, we will discuss 12 proven ways to return the device to performance without resorting to radical measures like flashing or replacing iron.

It’s important to understand that the Redmi 9T runs on a Snapdragon 662 processor with 4/6GB of RAM. It’s not a flagship, but when set up properly, the phone can show decent performance even after 3-4 years of use. We’ll focus on software methods that don’t require root rights and are suitable for users of any level.

If your smartphone is slow to open apps, frieze when scrolling or discharge quickly, don't be quick to blame the hardware. 80 percent of the time, the problem is with settings, application background activity or cache, and let's start with the simplest and safest ways, gradually moving to deeper optimization.

1.Cache and garbage cleanup: the first step to speeding up

The most common reason for brakes is filled cache and temporary files that accumulate over time. On the Redmi 9T with MIUI 12/13/14, cleaning the cache takes only a couple of minutes, but gives a noticeable increase in speed.

• 📱 Go to Settings. → The phone. → Memory and click "Clean" will delete unnecessary files, including residual data from remote applications.
• 🧹 In the same section, the tap "Clean" (broom icon) - the system will scan the device for debris, duplicates and large files.
• 🔄 For deep cleaning, use the settings → Annexes → Application management → Filter (three dots) → Sort by size. Remove or clear the cache from the heaviest programs.

Pay special attention to messengers (Telegram, WhatsApp) and social networks – they often store gigabytes of unnecessary media files. For example, on Telegram, go to Settings → Data and Memory → Storage and manually delete unnecessary files.

⚠️ Note: Do not clean the cache of system applications (e.g. com.android.systemui) manually through Settings → All applications. This can cause interface failures. MIUI.

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If after cleaning the cache, applications began to load longer on the first run, it is normal. The cache will recover automatically, and the speed will stabilize after 1-2 days.

2. Optimization of background processes and autoboot

MIUI is known for its "love" for background processes that eat up RAM and battery power. On the Redmi 9T with 4GB of RAM, this is particularly critical.

• ⚙️ Open the Settings. → Battery and productivity → Battery management and select Balanced Mode (not Performance»!).
• 🚫 Go to Settings. → Annexes → Application management → Autoplay and disable autoboot for unnecessary programs (especially games and social networks).
• 🔄 In the same section, tap Background Activity and limit it to applications you rarely use.

For advanced users: in Settings → Special features → Special features services disable all unnecessary services (for example, Miui Daemon or Analytics). They often work in the background, collecting data.

3. Updating the firmware and core of the system

Outdated firmware is one of the main causes of lags. Xiaomi regularly releases updates for the Redmi 9T, which optimize the processor and fix bugs.

1. Go to Settings → About the phone → System update.
2. Click on "Check Updates." If a new version is available, download it and install it.
3. After the update, reboot (not just turn off/on, but reboot via the power menu).

Critical information for Redmi 9T: After upgrading to MIUI 14+, some users are confronted with a “slow animation” bug. To fix this, go to Settings → Display → System Animation and select “No Animation” or “0.5x.”

If the official updates are no longer coming out (for example, your region is not supported), consider installing custom firmware based on LineageOS or Pixel Experience. However, this requires unlocking the bootloader and may take away warranty.

4. Factory reset: a radical but effective method

If all the previous methods didn't work, and the phone is still slowing down, it's time for a hard reset, which will delete all the data, but return the device to factory speed.

Make a backup copy in Settings → Additionally. → Backup and reset|Write down logins/passwords from accounts|Remove the memory card (if any)|Charge your phone at least 50%-->

Resetting instructions:

1. Go to Settings → Additional → Backup and Reset → Reset settings.
2. Select “Erase all data” and confirm the action.
3. After restarting, set up your phone as new (don’t restore data from the backup right away – check the speed of the clean system).

⚠️ Attention: On Redmi 9T s MIUI 12+ After the reset, you may have an error in activating Mi Account. To avoid blocking, unplug your account in Settings before resetting. → Xiaomi account → Get out.

If you reset your phone quickly, but it starts to slow again a week later, the problem is with the apps or settings you've restored. Try adding programs one at a time and monitoring your performance.

5. MIUI Optimization: Hidden Settings for Acceleration

MIUI contains many hidden functions that can be used to speed up the system.

• 🔧 Enable Developer Mode: Go to Settings → About the phone and 7 times tap on the "Version" MIUI». Then go back to Settings. → Additionally. → For developers and activate:
• 🎯 Turn off Miui Optimization (power users only!): in developer mode, find “Disable Optimization” MIUI» And you can activate it. It can speed things up, but there are some features. MIUI stop working.
• 📵 Turn off Second Space and Dual Apps (if you don’t use them): these features duplicate apps and eat resources. → Special facilities.

Another useful trick is to disable unnecessary system applications, such as Mi Video, Mi Music or GetApps, which can be deactivated by:

Settings → Applications → Application Management → All Apps → [select unnecessary] → Disable

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Disabling system applications does not remove them completely, but prevents background activity and saves up to 200-300 MB of RAM.

6 Use of lightweight alternatives for heavy applications

Many popular programs consume too much resources, and replace them with lighter versions:

Redmi 9T also uses launchers that consume less memory than the standard MIUI Launcher.

• Nova Launcher (configurable, lightweight)
• Lawnchair (with gesture support)
• Smart Launcher 6 (Automatic Application Sorting)

If you are actively using Google Apps, replace them with MicroG analogues – this will reduce the background activity of Google Play services.

7.Memory optimization: memory card and swap file

The Redmi 9T supports microSD cards up to 512GB, but not everyone knows how to use them correctly to speed up the system.

• 📁 Move the applications to SD-Map: Settings → Annexes → [select the application] → Warehouse → Change. → Memory card. Important: use a class card. A2 or UHS-I maximum speed.
• 🔄 Set the cache on SD-map: some firmwares allow you to transfer the Dalvik cache to an external drive, and this requires root rights and an application. SD Maid.
• 💾 Create a swap file: this will temporarily increase RAM through internal storage: