How to speed up Xiaomi Redmi 9T without data loss: the full guide

Xiaomi Redmi 9T is one of the most popular budget smartphones, but over time even it begins to “slow down”: apps open for a long time, animations twitch, and the battery dies in a few hours. The reasons can be different from clogged memory to outdated firmware. In this article, we will discuss 10 proven ways to speed up the Redmi 9T, including both software settings and hardware tricks that will return your phone to its former agility.

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 if optimized properly it can deliver decent performance even in 2026. We won’t recommend radical measures like a full reset (although this sometimes helps), but focus on safe and reversible methods that don’t require deleting your data.

If you notice that the phone is slower after the MIUI update, or it's warming up with simple tasks, that's a signal to action. Let's start with the simplest ways and gradually move on to the more advanced ones.

1. Cleaning up memory and cache: the first step to speeding up

The most common cause of brakes is clogged memory. The Redmi 9T only has 64 or 128 GB of internal memory, and if less than 10 percent of the available space is left, the system starts to run slower.

• 📱 Delete unnecessary files: Go to Settings → Storage and see what takes up the most space, most often photos, videos and instant messengers (especially Telegram and WhatsApp with their cache).
• 🗑️ Clear the app cache: in the same Storage section, click "Clear the cache." This won't delete your data, but will free up a few gigabytes.
• 🔍 Use the built-in cleaning utility: in MIUI There is a tool "Cleaning" (Security) → Cleanup) that removes junk files and residual data from remote applications.

Pay special attention to applications that you have not used for a long time, but continue to work in the background. For example, many games (PUBG Mobile, Genshin Impact) even after closing leave processes in memory, eating up resources.

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If you often shoot high-resolution videos, transfer them to a memory card or cloud (like Google Photos). 4K video weighs ~500MB per minute!

2. Disconnect background processes and autoboot

MIUI is known for aggressively controlling background processes, but sometimes it works against the user. Many applications (social networks, instant messengers, games) run automatically when you turn on the phone and continue to work in the background even if you do not use them, which not only slows down the system, but also drains the battery.

To fix this:

1. Go to Settings → Applications → Application Management.
2. Select the app you want to restrict (like Facebook or TikTok).
3. Click Auto Start and turn off this option.
4. Go back and select “Background Limitations” → “Limit background activity.”

For deeper optimization, you can use Battery Mode and Performance → Performance Mode, but be careful: some applications (for example, messengers) will stop notifying on time.

3. Update MIUI to the latest version

Often, the brakes are due to outdated firmware. Xiaomi regularly releases updates that optimize the processor, fix bugs and close vulnerabilities. As of 2026, the latest stable version of MIUI for the Redmi 9T is MIUI 14 (or newer if the release has already taken place).

To update:

1. Go to Settings → About the phone → System update.
2. Click on "Check Updates."
3. If the update is available, download and install it. Important: before upgrading, charge your phone to at least 50% and connect to Wi-Fi to avoid interrupting the download.

If the update doesn't come automatically, you can try installing it manually through Recovery or Fastboot, but it takes experience. OTA-update.

4. Optimization of animation and visual effects

MIUI is known for its beautiful animations, but they eat up the CPU's resources. Disabling or slowing down the animation speed can 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: Windows animation scale → set 0.5x or turn off (Animation disabled). transition animation scale → same. Animator duration scale → 0.5x.

You can also turn off unnecessary visual effects:

• 🌈 Turn off the live wallpaper: they are constantly consuming resources GPU. Use static wallpaper.
• 🔄 Reduce screen refresh rate: If you’re running at 90Hz, try switching to 60Hz in Settings → Screen. → Frequency of update.

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Turning off animations doesn’t degrade the phone’s functionality, but it does make it work smoother, especially on weaker chipsets like the Snapdragon 662.

5. Use of Lite versions of applications

Many popular apps have lightweight versions optimized for weak smartphones, such as:

These versions not only take up less space, but also consume less RAM, which is critical for the Redmi 9T with 4 GB of RAM.

• 📷 Instead of Instagram, Barinstagram (an informal client).
• 🎵 Instead of YouTube Music, Musicolet (offline player).

Remove heavy social media|Install Lite versions of messengers|Disable auto-run of unnecessary applications|Transfer media files to a memory card-->

6.Reset to factory settings (last chance)

If all the previous methods didn't work, it's a complete reset, and it's a radical way, but it's guaranteed to bring back factory productivity before it's reset.

⚠️ Warning: Reset will delete all data, including photos, contacts and messages. be sure to back up through Settings → Additionally. → Backup and reset → Local backup or Google Account.

Resetting instructions:

1. Go to Settings → Additional → Backup and Reset.
2. Select "Settings Reset."
3. Confirm the action and wait for the reboot (it will take 5-10 minutes).

After discharge:

• 🔄 Don’t restore all data at once – it will load the system again.
• 📱 Install applications gradually, watching the performance.
• 🔧 Turn off synchronizing unnecessary data (e.g. game backups).

If even after resetting the phone brakes, the problem may be in the hardware (wear of the battery, overheating of the processor), in this case, you should contact the service center.

7. Hardware acceleration methods (for advanced)

If the software methods didn't work, you can try hardware tricks, which require caution, but sometimes they give you a noticeable increase in productivity.

• 🔋 Thermopaste replacement: over time, thermopaste on a Snapdragon processor 662 It dries out, which leads to overheating and trottling (automatically lowering the processor frequency). ~1000-1500 ruble.
• 🔄 Shutdown 5G: If you are not using the network 5G, Turn off this option in Settings → SIM-maps and mobile networks → The preferred type of network, which will reduce the load on the modem.
• 🛠️ CPU overclocking (only for experienced!): with the help of the engineering menu (#4636###), you can slightly increase the clock speed CPU, But it shortens the life of the chip and causes it to overheat.

⚠️ CPU overclocking and replacing the thermopaste are warranty-free (if it is still valid) and can cause permanent damage to the phone.

Another hardware factor is battery wear. If the battery runs out in 2-3 hours, it can limit the performance of the processor. Check the battery status through the AccuBattery app or in Settings → Battery → Battery Status.

FAQ: Frequent questions about Redmi 9T acceleration