How to speed up the work of Xiaomi Redmi 9: expert guide

Xiaomi Redmi 9, released in 2020, was once considered the king of the budget segment, offering an impressive battery and decent performance for its money. However, over time, even the most reliable devices begin to experience difficulties with processing modern applications and heavy versions of the MIUI operating system. Users often notice that the interface begins to slow down, applications open longer than usual, and the frame rate in games drops to uncomfortable values, turning the once-quick gadget into a slow machine.

The main reason for the slowdown is not so much the physical wear of the MediaTek Helio G80 processor as the accumulation of system debris, memory fragmentation and constant background processes of new versions of applications. The MIUI shell, based on Android, is known for its resource demands, which is especially noticeable on devices with 3 or 4 gigabytes of RAM. In this article, we will discuss comprehensive methods that will allow you to return your Redmi 9 to its former speed without having to buy a new device.

Before embarking on radical measures such as a complete data reset, you need to conduct deep diagnostics and software optimization. Many owners of Xiaomi smartphones are unaware of the existence of hidden engineering menus and special developer modes that can dramatically change the responsiveness of the interface.

System load analysis and memory cleaning

The first step to speed up Redmi 9 should be a thorough review of internal memory occupancy. Android requires free space to create temporary files and run the virtual memory mechanism efficiently. If the storage fill indicator is lit red, showing less than 10% of free space, the system will force all writing and reading processes to slow down.

Xiaomi’s built-in Security app provides basic cleaning tools, but often they aren’t deep enough. It’s recommended to manually check the folders of messengers like Telegram and WhatsApp, which have the property of accumulating gigabytes of cache of images and video files. Deleting old media files or transferring them to a microSD card or cloud storage is a critical step in optimization.

⚠️ Note: Do not delete files from system folders with names like Android/data or MIUI, If you are not sure about their purpose, this can lead to incorrect operation of installed applications or loss of system settings.

For more advanced cleaning, you can use specialized utilities, but often standard tools are enough. Go to the storage settings and analyze which applications take up the most space. Social networks and video players are often the leaders in disk space consumption. Regular cleaning of the browser cache and removing unused programs will free up valuable CPU resources.

Optimization of MIUI interface and animations

The visual component of the MIUI shell heavily relies on transition animations that create the illusion of smoothness, but consume the processing power of the processor. On budget devices, such as Redmi 9, reducing the quality or completely disabling animations can give a tangible increase in the speed of the interface response. This does not make the processor more powerful, but reduces the waiting time between user actions.

To access the hidden speed settings, you need to activate the developer mode. To do this, go to the Settings → About menu and quickly click 7 times on the MIUI version. Once the notification that you have become a developer, a new menu will open in the Advanced Settings section.

In the Developer menu, find the section related to drawing and rescale the animation. The standard value is usually 1x, but to speed up the Xiaomi Redmi 9, it is recommended to reduce it to 0.5x or turn it off altogether (0x), which will make switching between windows instantaneous, removing unnecessary delays.

Also worth paying attention to the design theme: heavy themes with live wallpaper and complex widgets can significantly load the graphics accelerator. Using a standard theme "Classic" or light static black wallpaper (especially important for energy saving, although the screen here IPS) will help reduce the load on the system.

Managing Autoboot and Background Processes

One of the main reasons Redmi 9 starts to slow down over time is the uncontrolled autoload of applications. Many programs prescribe themselves to autorun to constantly monitor notifications or update content, while consuming RAM and CPU cycles. In a limited 3-4 GB of RAM, this becomes a bottleneck.

In the Security menu, find the Permissions tool and then select AutoStart. Here you will see a list of all applications that start with the system. It is recommended to leave autoboot on only for instant messengers (for messages to come) and system services. All other programs, such as marketplaces, news aggregators or games, should be disabled.

• 🚀 Background activity restriction: Go to the battery settings for each heavy app and select No Limits mode only if you have critical notifications, otherwise it is better to use the standard restriction. MIUI.
• 🛑 Remove bloatware: Many pre-installed Xiaomi and Google apps can be turned off from the Apps menu if you don’t use them.
• 🔍 Cost analysis: Check battery usage statistics regularly, as fast-storage applications are often the main performance eaters.

Keep in mind that background processes are also responsible for geolocation and data synchronization. Disabling GPS and autosynchronization when they are not needed will not only save charge, but also unload the communication module and processor, preventing micro-lags of the interface.

Special features and game settings

There's a Simplification or Special Features feature on Android and MIUI that can both help and hurt performance. Some visuals for the visually impaired, such as color inversion or high-contrast text, require additional processing of the graphics conveyor. If you're not using these features, make sure they're completely disabled.

For mobile gamers, Redmi 9 is designed to feature the Game Turbo, a built-in tool that allows you to create a high-performance profile for selected games, prioritizing processor resources for gameplay and blocking background notifications. Activating this mode can improve FPS stability in demanding projects.

In the Game Turbo settings, you can choose Balanced or Performance mode. The second option will make the Helio G80 processor run at higher frequencies, which will lead to heat, but will provide maximum response speed. It is also worth checking the display settings: the screen refresh rate on the Redmi 9 is fixed at 60 Hz, but some firmware has hidden options through ADB, although using them requires caution.

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Use Do Not Disturb mode during games, which not only eliminates calls, but also prevents the system from performing background indexing or updates at the most inopportune time.

There is also a myth that constantly cleaning RAM through “all windows closed” is useful. In fact, the Android system itself effectively manages memory, and the frequent forced unloading of applications causes the processor to restart them, spending more energy and time.

Network settings and the impact of advertising on speed

Many users do not associate slow smartphone performance with network activity, but the background download of application updates, synchronizing photos to the cloud or intrusive advertising in MIUI system applications can create a constant load on the communication channel and the processor.

To speed up the Xiaomi Redmi 9, it is recommended to disable personalized advertising in the system. Go to Settings → Passwords and Security → Privacy → Advertising services and disable ad personalization. This will not remove advertising completely, but will reduce the burden of data collection.

It’s also worth checking the settings for automatic app updates in Google Play and GetApps. Install the update only via Wi-Fi so that background processes don’t try to download heavy data packets when using the mobile internet, which often causes the interface to “freeze.”

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Disabling ads and limiting background network activity is a hidden performance reserve that is often ignored, focusing only on cleaning the cache.

Expanding memory and using a microSD card

Redmi 9 supports microSD card installation, which is a great way to offload internal storage. Newer versions of MIUI include the Memory Extension feature, which allows you to use part of internal memory or memory card as virtual RAM.

Be careful with this feature, however: The read and write speed of microSD cards, even UHS-I, is significantly lower than that of the phone’s built-in drive. Using a slow card as an extension of RAM can backfire, with the system starting to run even slower due to delays in accessing virtual memory.

If you use a memory card, it is better to use it solely as file storage for photos, videos and music. To do this, select the card as the main place to save new files in the storage settings, which will free up precious internal space of the system, which will positively affect the overall speed of flash memory.

⚠️ Note: Formatting a memory card as internal storage (full system integration) on Android 10/11 can make the card unreadable on other devices and slow down the phone if the card does not have a high write speed (class) A2).

It is recommended to use memory cards from proven manufacturers, such as SanDisk or Samsung, with a high-speed marking. Cheap cards with AliExpress often have a real jauh speed below the stated one, which can cause the interface to freeze when trying to open a gallery or file manager.

Radical measures: Resetting and reflashing

If software optimization and cleaning didn’t work and the Xiaomi Redmi 9 continues to run in an unstable way, the last effective method is a complete factory reset, which removes all user data, applications and accumulated system debris, returning the device to the “out of the box” state.

Before starting the procedure, be sure to back up important data via Mi Cloud or computer. Reset can be done via Settings menu → About phone → Reset settings → Erase all data. The process will take about 10-15 minutes, after which the phone will start as new.

adb reboot recovery

In more complex cases, where the problem lies in firmware errors, it may be necessary to flash the device through the computer using the Mi Flash Tool utility.This allows you to install a clean version of MIUI without operator modifications or regional bugs. However, this method requires certain technical skills and carries risks if performed improperly.

After reset, don't install all the apps right away. Watch the clean phone. If it's running fast, it's a software conflict or a garbage problem. If the lags persist even on a clean system, it could indicate physical wear and tear on the drive or other hardware malfunctions.

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