Owners of the popular Xiaomi Redmi 9 T often face a situation where the smartphone starts to work slower after several months of active use.It is a natural process of accumulation of cache, background processes and temporary files that take up precious RAM resources. A device with a RAM of 4 or 6 gigabytes, despite the optimization of the MIUI system, requires periodic maintenance to maintain high performance.
There are many myths that constant forced cleaning is harmful to the system, but in the reality of the Android mobile ecosystem, periodic resetting of inactive processes is a necessity, especially for mid-range devices, where resource management should be more stringent, competent cleaning allows you to make room for running demanding applications and games, and prevents sudden reboots of the interface.
In this guide, we will not only look at the standard methods built into the MIUI shell, but also at deeper optimization methods. You will learn how to use the built-in tools correctly, what settings should be changed to improve the work, and when third-party intervention is really necessary. System expansion of memory on the Redmi 9 T is possible only by software methods, since physical enlargement of the RAM chip at home is impossible.
⚠️ Note: Do not use questionable accelerator apps from unknown sources, as they can consume significant resources and display ads themselves, slowing down the Redmi 9 T.
Use of the built-in Security application
The easiest and safest way to free up resources is to use a standard tool from the system developers. Each Xiaomi smartphone has a Security app preinstalled, which has access to low-level cleaning functions, which allows you to delete temporary files and close background processes with a single click, which is especially convenient for regular maintenance.
When you start cleaning, the system analyzes the current state of RAM and suggests the optimal scenario. It is important to understand that this method only closes those processes that are not critical to the operation of Android. System services will remain active to ensure the stability of communication and notifications, which is the right approach to energy management.
For best results, it is recommended to perform this procedure regularly, for example, every few days or before starting resource-intensive tasks, which helps keep the system in good shape and prevents the accumulation of “junk” processes that can conflict with each other.
- 📱 Find an icon on your desktop called “Security” (green shield) and run it.
- 🧹 Click on the Cleanup button in the top block or select Memory for detailed analysis.
- 🚀 After scanning, press the Clean button to free the occupied amount of RAM.
Once you clean up, you'll see a message telling you how many megabytes have been released, but it's worth remembering that MIUI has the ability to quickly fill up the space with newly launched services, so it's best to use this method just before using heavy software.
Set up extended memory and application management
One of the key features of modern MIUI shells is the ability to control the behavior of applications in the background. Unlike pure Android, you can manually prevent specific programs from running in the background, which significantly saves RAM resources, which is especially useful for applications that you rarely use, but which are constantly hanging on the list of running.
To set up, go to the app menu and find the program you want. In the Battery or Other Permissions section, you can limit its background activity. In the Xiaomi Redmi 9 T, you can also have Expand Memory, which takes a piece of embedded storage and uses it as virtual RAM. Although the speed of this partition is lower than that of physical memory, it helps the system keep more applications open without unloading them.
What is virtual memory in MIUI?
Don’t abuse the complete ban on background work for instant messengers or email clients, otherwise you will stop receiving notifications in real time.The optimal strategy is to limit only heavy applications, social networks and games that do not require a constant connection to the server.
☑️ Optimization of background processes
Manually cleansing cache and deleting temporary files
Cache accumulation is the main reason RAM and internal storage are filled with garbage.Cache is temporary data that applications save for faster content loading.Over time, this data can take up gigabytes of space and cause malfunctions in programs, requiring immediate cleaning.
Cleaning can be done through the specific application settings and through the shared storage menu. In Xiaomi Redmi 9 T, the path to these settings is standardized, which simplifies the maintenance process. Regular cleaning of the browser cache, social networks and video services can return the device to its former sharpness of the interface.
| Type of data | Wherever | Security of removal | Recommended frequency |
|---|---|---|---|
| Cash app. | Settings → Applications | Safe (data will not be lost) | Once a week. |
| Downloads (Downloads) | File Manager → Downloads | Safe (if files are not needed) | Once a month |
| Temporary files | Security Annex | Completely safe. | As necessary |
| Application data | Settings → Applications | Dangerous (reset to factory settings app) | Only when it fails. |
When removing these applications, be extremely careful: this action will completely reset the program to its original state, as if you just installed it. All logins, saves and settings within a particular application will be lost, so use this feature only for problematic software.
Disabling animation and visual effects
The visual component of the MIUI interface also consumes GPU and RAM resources. Transition animations, background blur and live wallpaper create a strain on the system, which on the Redmi 9 T can be felt when there is a lack of free resources. Disabling or reducing these effects is a proven way to speed up the response of the system.
To access the hidden animation settings, you need to activate the developer mode. This is a standard procedure for Android, which gives you access to fine-tuning the system. Once activated, the developer menu will be available in the main settings of the phone, where you can find window zoom and animation options.
Settings → About phone → 7 times press on "Version MIUI"Then, in the Additional → For developers, find the “Scale of window animation,” “Scale of transition animation,” and “Scale of animator duration.” Change the value from standard 1x to 0.5x or completely disable (No animation) this will make the interface sharper and more responsive, visually unloading the system.
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Use static black wallpaper. AMOLED-screens (if the model supports) or simply on the LCD This reduces the load on the video processor and saves battery power, indirectly affecting the overall performance of the system.
Analysis of running services and widgets
Often users do not even know how much resources are consumed by installed widgets on the desktop. Live widgets weather, news, currency rates are constantly updated over the Internet and take up space in RAM. On devices with a moderate volume of RAM, the presence of 5-10 widgets can cause lags.
Do a desktop revision and remove all unused widgets. Leave only the most essential ones, such as a clock or calendar, and make sure they don't get updated too often. It's also worth checking the list of running services in the developer menu to identify hidden processes that can eat up memory.
- 🔍 Press and hold your finger in the free desktop space, then select “Widgets».
- 🗑️ Remove all heavy widgets, such as Google Discover or dynamic wallpaper, if they are not critical.
- ⚙️ In the developer menu, enable the option “Show running services” to see the real load.
The Tape widget to the left of the home screen is worth a special attention, and it often consumes a significant amount of resources to download news and recommendations, and disabling or deleting it is one of the most effective ways to speed up the Xiaomi Redmi 9 T.
⚠️ Warning: Disabling system services through the developer menu without understanding their purpose can cause the phone to run unstable or lose communication.
Radical measures: Resetting and reflashing
If the software cleaning methods have failed and the smartphone continues to slow down, the problem may be deep system errors or file fragmentation, in which case the only effective solution is a complete factory reset, which completely clears RAM and internal storage, returning the device to the “out of the box” state.
Before you reset, make sure to back up all your important data, as it will be permanently deleted. Use the Mi Cloud cloud service or your computer to save your contacts, photos and documents. Once reset, the system will work as quickly as possible, as all the accumulated file conflicts over the years will disappear.
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Full reset is the most effective way to deal with software brakes, but it takes time to reconfigure the device and install applications.
In rare cases, when even a reset doesn’t help, it may be necessary to flash the device through the computer using the Mi Flash Tool utility.This is a complex procedure that requires unlocking the bootloader, and it is recommended only for advanced users. For most situations, a standard reset through the settings menu is enough.
Settings → About the phone → Reset settings → Erase all data