How to remove lags on Xiaomi Redmi Note 9: the complete guide

Xiaomi Redmi Note 9 was a real hit with great value for money, but over time, even such a reliable device can start to work slower, there are delays when opening applications and twitching the interface, it is a natural process associated with the accumulation of digital debris, updating applications and changing the requirements of the software environment to the hardware of the device.

Owners often wonder why a phone that flew a year ago now responds to touch with a noticeable delay, mainly because of data fragmentation and overflowing system cache, and the MIUI shell, while functional, is resource-intensive and needs regular optimization to work comfortably.

In this article, we will discuss proven methods that will help to restore the former abruptness of your gadget. We will not use third-party cleaners, which often become a source of problems, but turn to the built-in tools of the system.

Diagnostics of causes of slowdown

Before you start to take action, you need to understand what is causing the strain on the processor and RAM. Most often, the culprits are background processes that the user does not even notice. Social networks and instant messengers tend to be constantly hanging in the memory, waiting for a new message that eats up precious resources.

Another factor is internal memory wear, which means that when free disk space reaches a critical point, the speed of reading and writing data drops dramatically, the system cannot efficiently use virtual memory and create temporary files necessary for applications to run, which leads to even simple operations being delayed.

⚠️ Warning: If your phone suddenly starts to warm and brake at the same time, check the list of installed applications. Often the cause is a malicious miner or ad virus hidden in a game or utility downloaded from an unverified source.

Also, consider the physical wear of the battery: When the battery is degraded, the system can artificially limit the performance of the processor to prevent the device from suddenly turning off, and you can check the status of the battery in the diagnostic menu or through special codes of the engineering menu.

Cleaning and optimizing memory

The first step to speed up the Redmi Note 9 should be to thoroughly clean the drive. Xiaomi’s standard “Security” app does a good job of basic tasks, but for deep cleaning, it is better to use a manual method.

Go to the storage settings and analyze which files take up the most space. Often, deleted photos and videos are left in the Downloads folder or in the gallery trash cans, which still take up space, and releasing at least 15-20% of the total memory will significantly affect the system performance.

You can use built-in optimization tools to automate the process, but you can't rely on them alone. Regular manual checks can find forgotten APK installation files or error logs that the system doesn't consider garbage, and removing this data is safe and will not affect the basic functions of the smartphone.

• 🗑️ Clear the app cache through storage settings, removing temporary files.
• 📂 Move photos and videos to a memory card or cloud storage to free up your internal drive.
• 🚫 Remove unused apps, especially those with built-in ads.
• 📱 Check the trash folder in the gallery and clear it of deleted images.

Interface and animation setting

The visual aspect of the MIUI shell often causes a subjective sense of "laziness." Beautiful animations of desktop transitions and window openings require graphics accelerator resources, and if you reduce the intensity or completely disable them, the interface becomes more responsive instantly.

To access these settings, you need to activate the developer menu. Make a few quick clicks on the build number in the About section. Then, in the advanced settings, you will see items that allow you to control the animation speed, you should set the animation scale of windows and transitions to 0.5x or even turn them off completely.

Another important option is to expand RAM, with newer Xiaomi firmware versions including Memory Extension, which takes some of the internal memory and uses it as an additional RAM. For the Redmi Note 9 with its 4 or 6 GB of RAM, this could be a critical parameter for multitasking.

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Turn on Safe Mode for 5 minutes to see if a third-party application affects the speed of the interface. If the lags are missing, the installed software is a problem.

And don't forget the wallpaper. Dynamic images on the desktop consume a lot of power and load the processor with each swipe, and replacing them with a static image is an easy way to reduce the load on the system's graphics engine.

Managing Autoboot and Background Processes

Controlling what runs with the operating system is key to optimization, with many apps prescribing themselves to autoboot without the user's knowledge, which leads to the phone continuing to perform background tasks even in sleep mode, slowing down active programs.

In the battery settings, look for "Start" and you need to manually disable all apps you don't need right after you turn on your phone, and you'd better leave messengers to keep notifications on, but you can safely ban marketplaces, news aggregators and games.

Also, you should limit background activity for applications that you rarely use, so you can set the "No Limits" mode on the "Battery and Performance" menu for important programs only, and put the rest into energy saving mode, which will prevent them from constantly running in the background.

System update and resetting

Xiaomi regularly releases security and optimization updates for its devices; Redmi Note 9 may have received patches that correct errors in the communication modules or graphical interface; checking for updates is a mandatory diagnostic step.

If the software methods don't work, the radical but effective way is to completely reset to factory settings, which will delete all user data, applications and settings, returning the phone to the "out of the box" state.

⚠️ Warning: Before performing a full reset (Wipe Data), make sure that the battery is at least 60%. interruption of the firmware or reset process due to discharge may lead to the inability to boot the system.

Once reset, you don't have to restore all applications from the backup in one fell swoop; you'd better reinstall them to avoid transferring old conflicting configuration files. A clean installation often works wonders, significantly extending the life of the device.

Additional Acceleration Tips

There are a number of lesser-known settings that can affect performance, such as disabling ads in MIUI system applications (MSA) reducing the load on the network module and processor. Advertising services are constantly collecting data and loading banners, distracting the phone's resources.

It is also recommended to disable unused Google services if you do not use them.Sync multiple accounts, geolocation in the background and constant search of Wi-Fi networks can significantly strain the system.Switching off unnecessary functions in the menus "Privacy" and "Location" will increase speed.

• 🚫 Shut down the service. MSA in password and security settings for removing ads.
• 📡 Turn off Bluetooth and GPS, When not used to reduce background load.
• 🌙 Use a dark topic if you have a AMOLED-screen, this will reduce the load on the display controller.
• 🔄 Reboot your smartphone regularly, at least once in a while. 2-3 day-to-day resetting.

Using lightweight app versions (Lite) is also a great strategy for the Redmi Note 9. The Facebook Lite, Messenger Lite, or Google Go versions consume significantly fewer resources and run faster on devices of the past.

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Comprehensive approach: the combination of memory cleaning, disabling animations and autoboot control gives the maximum effect in the fight against lags.

Frequently Asked Questions (FAQ)