How to Optimize Xiaomi Redmi 9: A Complete Guide to Acceleration and Customization

Xiaomi Redmi 9 remains a popular choice due to its price-performance balance, but over time even it begins to slow down. The reasons can be different: filled memory, unnecessary background processes, outdated firmware or suboptimal MIUI settings. This article will help to return the device to its former agileness without radical measures like factory reset.

We will discuss both software methods (cleaning cache, disabling application autoload) and hardware nuances (configuring the battery, choosing the right firmware), and pay special attention to the hidden features of MIUI 12/13, which most users ignore, but can significantly speed up the smartphone, all recommendations are tested on current versions of the software and do not require root rights.

1. Cleaning the system: remove garbage and free up memory

The first step to optimization is the release of internal storage. Redmi 9 is equipped with 32/64 GB of memory, but is actually available to the user 5-8 GB less due to preinstalled software. When filling up memory by 90%+, the system begins to noticeably slow down.

Start with the built-in Settings tool → Storage:

Click “Clean” in the “Junk Files” section (removes app cache, temporary files, empty folders).

Go to Apps and sort by size – remove unused programs (especially games and social networks that take 1-2 GB).

- Check the “Downloads” section – often unnecessary ones accumulate there. APK-file.

• 🧹 App cache: Manually clean for frequently used programs (e.g. YouTube or Telegram can accumulate 500MB of cache).
• 📁 Duplicate files: Use Files by Google or MI File Manager for Repeated Photos/Video.
• 🗑️ System garbage: Apps like SD Maid (requires root) or CCleaner will find residual files after uninstalling the programs.

⚠️ Note: Do not clear the cache of system applications (e.g. com.android.systemui) – this can cause shell malfunctions MIUI.

2. MIUI Optimization: Hidden Settings for Acceleration

The MIUI shell is known for its functionality, but many of the useful options are hidden deep in the menu.

1. Interface animation: Go to Settings → About Phone → MIUI version (tap 7 times to activate developer mode). Then to Settings → Additional → For developers, set: - "Window Animation Scale" → 0.5x - "Transition Animation Scale" → 0.5x - "Duration of Animator" → Off.
2. Background Processes: Limit their number in Settings → Battery → Battery Settings → Background Processes (select Standard Limit or Hard Limit).
3. Autorun apps: In Settings → Applications → Application Management → Autorun disable autoboot for unnecessary programs (especially instant messengers and games).

Another effective trick is to shut down. MIUI Optimization (optimization) MIUI). It's a system service that sometimes conflicts with the background:

adb shell settings put global miui_optimization_disabled 1

Once you have completed the command, restart the device. Note: this method requires connecting the smartphone to the PC and activating debugging over USB.

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If after the shutdown MIUI Optimization appeared graphical glitches, return settings with the command adb shell settings put global miui_optimization_disabled 0 and reboot the device.

Battery management: how to extend the life of the battery and speed up work

The Redmi 9 is equipped with a 5020 mAh battery, but over time its capacity decreases, and the wrong settings accelerate wear. Optimizing energy consumption will not only prolong battery life, but also reduce the load on the processor.

Main recommendations:

• 🔋 Performance mode: C Settings → Battery → Battery mode select Balance (not Performance) and Saving mode restricts background processes too aggressively.
• 🌙 Dark theme: Activate it in Settings → Display. → Dark subject. AMOLED-screens (at Redmi's) 9 — IPS, But it's still useful, it reduces consumption by 10-15%.
• 📡 Adaptive brightness: Turn it off and set a fixed brightness value at the level 40-50%. Automatic adjustment often works incorrectly and consumes additional resources.

⚠️ Note: If you use Redmi 9 with custom firmware (like LineageOS), battery settings may vary.In this case, check the kernel settings through the Kernel Adiutor app.

4. Firmware Update: When and How to Do It Right

Regular MIUI updates not only add new features, but also optimize the system, but not all updates are equally useful.

Rules of update:

Always update through Settings → About Phone → System Update, not through third-party sites.

Check reviews on forums (such as 4PDA or XDA-Developers) before updating – sometimes newer versions contain bugs.

If you have lags after the update, reset the cache to Recovery (press Power + Volume up when downloading, select “Wipe Cache Partition”).

For Redmi 9, two firmware branches are relevant:

1. Stable (recommended for most users) - updated every 1-2 months, is tested.

2. Beta (for enthusiasts) - weekly builds with new features, but bugs are possible.

5. Application optimization: what can be turned off without consequences

MIUI preinstalles many Xiaomi services, some of which duplicate Google features or are not used at all, and disabling them will free up RAM and reduce background activity.

List of safe applications to disable:

• 📱 com.miui.analytics – statistics collection (disabled without root via adb).
• 🎵 com.miui.player is a standard music player (can be replaced by Spotify or Spotify) VLC).
• 📖 com.miui.notes – notebook (if you do not use it).
• 🌐 com.miui.browser – Mi Browser (better to use Chrome or Firefox).

To disable system applications without root rights, use the command:

adb shell pm disable-user --user 0 name packet

To return the application, replace the disable-user with enable.

Remove unused games and social networks

Disable auto-start for messengers

Replace standard MIUI applications with alternatives

Clear cache for frequently used programs-->

6. Hardware tricks: how to improve performance without firmware

If the software methods didn't work, try hardware solutions. They don't require disassembling the device, but they can make a big difference in speed.

Effective methods:

• 🔄 Thermopaste replacement: Over time, the thermointerface between the processor and radiator dries up, leading to overheating and trottling (automatic frequency reduction). CPU). In the service center, this procedure will be performed for 30-60 minute.
• 🔋 Battery calibration: If the smartphone suddenly turns off when 20-30% Execute the full discharge/charging cycle (discharge to 0%, then charge to 100% breaklessly).
• 📶 Shift. SIM-maps: Old SIM-Cards (especially Mini-SIM) can cause network problems, leading to increased power consumption and lagoons.

To check the temperature of the processor, use the AIDA64 application. Normal values for Redmi 9 (Helio G80 processor):

- In plain: 30-40°C.

Under load (games, benchmarks): up to 65°C.

If the temperature is above 70°C, it indicates cooling problems.

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Overheating is one of the main causes of brakes. If the CPU temperature exceeds 70°C, immediately clean the charging connector from dust and check the cooler (if you have one in your model).

7. Alternative firmware: whether to switch to custom software

If standard methods didn't work, consider installing custom firmware.This is a radical step, but it can breathe a second life into Redmi 9.

Before installing custom firmware:

1. Unlock the bootloader through the official Mi Unlock Tool (requires a Xiaomi account binding and wait 7 days).
2. Install TWRP Recovery for your model (instructions are available on 4PDA).
3. Make a full backup through TWRP (including the EFS section where the IMEI is stored).

⚠️ Warning: Installing custom firmware voids warranty and can result in a "brick" (inoperability) of the device.On Redmi 9 with MediaTek Helio processor G80 It is especially important to use firmware that supports Project Treble.

FAQ: Frequent questions about Redmi optimization 9