How to speed up Xiaomi Redmi Note 9S: expert guide

Xiaomi Redmi Note 9S came to market as a device with excellent performance, but over time, even powerful hardware can face slowdowns.It is a natural process caused by the accumulation of temporary files, updating applications and changing the algorithms of the Android operating system. Owners often notice that the interface begins to slow down and the launch of games takes longer than when buying a gadget.

However, you should not panic ahead of time. In most cases, the problem lies not in the physical wear of the Snapdragon 720G processor, but in software conflicts or improper operation of the MIUI shell. Competent optimization can return the device to its former sharpness and responsiveness without the need to replace the device.

In this article, we will look at proven methods to speed up your smartphone, we will look at both standard cleaning tools and advanced settings that not all users know about.

Analysis of the current state of the system and storage

The first step to speed up the Redmi Note 9S is deep diagnostics. Often the cause of lags is crowded internal memory, which leaves the system no room to maneuver. When storage is over 85-90% full, the speed of writing and reading data critically drops, which causes friezes in the interface.

You need to check which applications are using the most resources in the background. The MIUI shell has built-in monitoring tools, but they don't always show the full picture. For a detailed analysis, you should look at the battery usage statistics section, where you can see not only power consumption, but also process activity.

Note the amount of RAM you have, and if RAM is 90 percent full right after you turn it on, then some programs are running automatically and hanging in the background, and that's a common problem with heavy applications like Facebook or marketplaces that don't know how to get their work done properly.

• 📱 Check the vacant space in the "Storage" section - it must be at least 15% of the total volume.
• ⚡ Sort apps by work time in the background and find “gluttonous” programs.
• 🗑️ Remove the cache of long-unused apps that can take up gigabytes of space.

The system analyzer can show that the most space is occupied by “Other Files”, often remnants of deleted programs or error logs, and their safe removal can free up to 5-10 GB, which will significantly affect the speed of the file system.

Basic optimization of MIUI settings

The Xiaomi Redmi Note 9S starts with basic interface settings. The MIUI shell is famous for its visual richness, but transition animations can create the illusion of slow work, even if the processor copes with tasks instantly. Reducing the duration of animations is the first step to the feeling of a “fast phone”.

⚠️ Attention: Scaling the animation does not increase the actual processing power, but makes the system response visually instantaneous. Do not set the value "No animation", as this can violate the logic of transitions between windows.

To access hidden settings, activate the developer mode. Go to Settings → About Phone and quickly click 7 times on MIUI Version. After that, a new section will appear on the menu "Additional" or "Extended Settings", where you will find "For Developers".

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Take a screenshot of the current animation settings before changing so that in case of discomfort, everything can be returned as it was.

Inside the developer menu, find three items related to scaling: "Window animation scale," "Scale of transition animation," and "Scale of animator duration." Standard value is 1x. Change it to 0.5x. This will make all interface movements twice as fast.

Also worth paying attention to is the Memory Extension feature, if available in your firmware version. It uses some of the internal storage as virtual RAM. For the Redmi Note 9S with 6GB RAM, enabling this feature can help with multitasking, but if you have a 4GB version, it's best to leave that option off so you don't load the drive.

Managing Autoboot and Background Processes

One of the main reasons for the slowdown is the uncontrolled auto-run of applications. In the Android ecosystem, many programs tend to run along with the system to notify or update data. On the Redmi Note 9S, this leads to the fact that 10 minutes after turning on the phone is already loaded with a dozen processes.

Autoboot management in MIUI is done through a special application called "Security." Open it, go to the "Permissions" section and find the "Out-Start" item. You only need to leave on messengers (for messages to come) and system services. Social networks, games and stores should be turned off.

In addition to auto-run, there is a mechanism for floating windows and background work. Some applications, even after closing, continue to hang in memory. Go to Settings → Applications → Application Management, select an unnecessary program and click on “Saving Charge”. Set “No Limits” mode only for mission-critical applications, and for others, select “Limit background activity”.

Focus on Xiaomi system services like MSA (MIUI System Ads), which consumes CPU resources to download targeted offers, and disabling it will not only speed up the phone, but also remove ads from standard apps.

• 🚫 Turn off autoplay for all games and entertainment apps.
• 🔋 Limit background activity for apps you rarely use.
• 📉 Deactivate the service MSA in the authorization and confidentiality settings.

Cleaning the cache and removing system debris

Cache accumulation is a scourge of any Android smartphone. Apps save time to load faster, but over time these files grow, take up space and may contain errors that cause conflicts. Regular cleaning is a mandatory procedure to keep the Redmi Note 9S in good shape.

The standard cleaner in the Security app is good, but it's superficial. For deep cleaning, it's recommended to use a file manager, such as the built-in Explorer or Total Commander. Android/data and Android/obb. There are often "tails" from remote games and programs.

⚠️ Warning: When manually cleaning folders through a file manager, be extremely careful.Deleting system files from root directories can lead to unstable phone operation or data loss.

It's also worth checking the DCIM/.thumbnails folder, which stores thumbnails of your photos and videos, and over time, this file can grow to a few gigabytes, although you won't notice it visually in the gallery, it can be safely deleted, the system will create a new one if necessary.

Special features and visual effects

Many users are unaware that features for people with disabilities can significantly affect the performance of the Xiaomi Redmi Note 9S. Availability services enabled, such as Speaker Allocation or Enlargement, constantly monitor user activities by consuming CPU cycles.

Go to Settings → Advanced Settings → Special Features. Go through all tabs ("Sight", "Hearing", "Physical") and turn off all unused features. Even if you don't use them, they can be activated by default or accidentally enabled.

Another hidden resource eater is Wallpaper Carousel, which is a feature that changes the picture on the lock screen every time you turn on your phone, downloading new images from the Internet, and disable it in the Themes app or in the lock screen settings to relieve the CPU from overload.

Also check font settings. Using heavy third-party fonts with complex graphics can slow down the rendering of text in menus and messages. Go back to standard system font for maximum interface rendering speed.

Radical measures: Resetting and reflashing

If software optimization fails, the last and most effective method is a complete factory reset, which removes all user data, applications and accumulated system errors, returning the Redmi Note 9S to the “out of the box” state.

Before performing the reset, be sure to create a full backup of all important data to the Mi Cloud cloud service or to your computer, since it will be impossible to recover deleted files without a backup.

The reset process is done via the Settings menu → About Phone → Settings reset → Erase all data. After that, the phone will restart and the cleaning process will begin, which can take anywhere from 10 to 30 minutes. Don't interrupt the power of the device at this time.

In some cases, especially if the phone has not received updates for a long time or was bought with Chinese firmware, flashing to a global stable version of MIUI via a computer can help. This is a more complex procedure that requires unlocking the bootloader, but it is guaranteed to eliminate the errors of previous updates.

• 🔄 Make a full backup of contacts, photos and correspondence before resetting.
• 🔋 Charge your phone to at least 60% before the procedure begins.
• 💾 Use the original cable to connect to your PC when flashing.

Frequently Asked Questions (FAQ)

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A comprehensive approach, including memory cleaning, disabling animations and autoboot control, can increase the speed of the Redmi Note 9S by 30-40%.