Owners of Xiaomi Redmi 9 often face a situation where the once-quick smartphone starts to work slower. MIUI interface hangs, applications open with a delay, and animations twitch, which is especially noticeable when switching between tasks. This is a common problem for mid-range devices, whose resource is spent over time on updating heavy system processes.
The main reason is that modern versions of the Android operating system and the MIUI shell require more processing power than the manufacturer had planned at the time of the modelβs release. The Helio G80 processor, which did a great job in 2020, is now experiencing difficulties rendering graphics in new versions of messengers and browsers.
Don't panic and think that the device is out of order. In most cases, you can fix the situation with software methods without resorting to expensive repairs or a complete replacement of the gadget. Competent optimization can restore the responsiveness of even an aging hardware.
Diagnosis: why the Redmi 9 is slowing down
Before we start taking drastic measures, we need to understand the root of the problem. Often users overload the system themselves, installing hundreds of applications that hang in the background. RAM (RAM) of 3 or 4 GB quickly fills up, and the system lacks the resources to smoothly switch between running programs.
Another critical factor is filling up internal storage, where when the disk space runs out, the speed of writing and reading data drops dramatically, which causes the phone to literally choke on its cache files.
β οΈ Note: If the phone not only lags, but also warms strongly in the simple, this may indicate a failure in the processor or the presence of a malicious miner.
It is also worth checking the operating system itself. After major MIUI updates, system files often become out of sync, causing periodic friezes, and in some cases, the culprit is the βheavyβ widgets on the desktop that constantly update data.
Memory Cleanup and Storage Optimization
The first and most effective step is to free up space. Android requires a free buffer to allow virtual memory to function properly, and if you fill the drive up, the interface speed will inevitably drop.
Use Xiaomiβs built-in Security app, which can find duplicate photos, remnants of deleted apps, and unused APK installation packages. Cleaning through this tool regularly helps keep the system on track.
Pay special attention to the cache of messengers such as Telegram or WhatsApp, which can accumulate gigabytes of temporary files that are not visible in a regular gallery, but take up precious space.
βοΈ Checklist for quick cleaning
You can use your computer to clean it up in depth by connecting your phone over USB. Manually delete folders with error logs and temporary files if you're sure they're not useful, and that will make room for system operations.
Configure the MIUI interface for speed
MIUI is famous for its beauty, but animations often cause visual delays, and turning off or accelerating these effects is a proven way to make the interface more responsive without losing functionality.
To get into the developer menu, you need to click on the build number several times in the About Phone section, after which the Developer Forward option will appear in the advanced settings, where key performance parameters are hidden.
Find the section that's responsible for zooming animations. Change the window scale, transition animations, and animator duration from 1x to 0.5x, or completely disable them. Visually, the phone will work instantly.
| Parameter | Standard value | Optimized value | The effect |
|---|---|---|---|
| The window scale | 1x | 0.5x | Accelerating the opening of applications |
| Transition scale | 1x | 0.5x | Quick screen switching |
| Duration of the animator | 1x | Off | Instant interface response |
| Background processes | No limit. | No more than 2. | RAM Liberation |
Should I use "Memory Extension"?
Managing Autoboot and Background Processes
Many apps tend to start right after the phone is turned on and continue to run in the background, consuming CPU resources. MIUI has a powerful tool to control this behavior that is often ignored by users.
Go to the battery settings and select a specific application. Set the power saving mode in the "Strictly Limit" position for programs you don't need in real time, which will prevent them from hanging in memory.
You should also disable auto-start for all untested applications, and leave this feature only for messengers and alarms, which will significantly reduce the load on the CPU during downtime.
Remember to use the memory feature in the security application: set up automatic memory cleanup so that the system closes unused tabs and programs, freeing up resources for active tasks.
System update and resetting
Sometimes the problem lies in software errors of the current firmware version. Check for updates in the About Phone section. Xiaomi developers periodically release patches that fix memory leaks and optimize the driver.
If the update didnβt work and the phone keeps laying down, you might consider resetting to factory settings, a last resort that will delete all your data but put the system back out of the box.
β οΈ Before reset, make sure to make a full backup of contacts and photos on Google Drive or computer, otherwise the data will be lost irretrievably.
After reset, don't be in a hurry to install all the apps at once. Try using a clean phone for a couple of days. If it works fast, then the problem was in the software or the conflict of installed programs.
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Wipe Data is the only way to get rid of software debris accumulated over the years of using the device.
Special features and game modes
Accessibility features hide features that can help or harm performance, such as voiceover services or zooming can put additional strain on the graphics engine.
For games, use the built-in Game Turbo. It not only blocks notifications, but also redistributes CPU resources in favor of running the game, closing the background processes more aggressively than usual.
Turn off redundant features like Widget Ribbon (swipe left on your desktop) if you don't use them. This interface element consumes the internet and CPU time to update news.
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Turn off the vibration of the keyboard and system buttons. This will not only save battery power, but also reduce micro-latency when typing, making typing more smooth.