Xiaomi Redmi 9C, released in 2020, is still a popular device due to its affordable price and reliable battery. However, over time, owners begin to notice that the MIUI shell interface begins to slow down and applications open longer than usual. This is a natural process of software aging, but the situation can be significantly corrected by correct system optimization.
In this article, we'll take a comprehensive approach to improving your device's performance, not using questionable accelerators that consume resources themselves, but instead focusing on fine-tuning hidden parameters and cleaning up system debris, and following these steps will return the smartphone to its previous sharpness of response.
Before we get to the tricky side of this, the Redmi 9C is based on the MediaTek Helio G35, which means that the device’s resources are limited and background processes can have a huge impact on overall performance, and managing these processes well is key to success.
Basic cleaning and memory management
The first step is to free up RAM and internal memory. When the storage space runs out, the system starts to run slower due to fragmentation of data and lack of cache space, remove unused applications and transfer photos to a cloud server or computer.
The built-in cleaning tool in MIUI works quite well for basic tasks, but it's important not to rely on automated algorithms alone. Manually check the folders of messengers like Telegram or WhatsApp, where gigabytes of unnecessary video files are often accumulated, and deleting them will instantly affect the speed of the file system.
⚠️ Warning: Don’t use third-party apps from the Play Market that promise “one-click acceleration.” They often hang in RAM and show intrusive ads, which only slows down the Xiaomi Redmi. 9C.
To clean the app cache deeply, you should go to the storage settings, pick heavy programs and clear their cache, but not the data, if you want to keep logins and progress in games. Regular file system hygiene is the key to stability.
☑️ Checklist for quick cleaning
Optimization of MIUI interface
MIUI is famous for its visual richness, but animations often create the illusion of slow work. If a smartphone responds to latency touches, it is worth reducing the duration of animation effects, which will make the interface more responsive and sharp.
To do this, you need to activate the developer menu. Go to Settings. → On the phone and press quickly 7-10 once on the line “Version” MIUI». After the activation message appears, go back to the main settings menu and find the option “Advanced” where the developer menu hides.
Inside the menu, find the section "Drawing" or "Animation" and you're interested in three things: "Window animation", "Switch animation" and "Duration of animations." Change their value from 1x to 0.5x. Visually, the interface will work twice as fast, because the system will take less time to render transitions between screens.
- 🚀 Reducing animation reduces the load on the GPU GPU.
- 🎨 Visual style becomes more rigorous and informative.
- ⚡ The response to the touch feels almost instantaneous.
Also, you should disable unnecessary desktop widgets. Live wallpaper and constantly updated news widgets consume CPU resources even in standby mode. Replacing them with static images will free up CPU cycles for your current tasks.
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Use a dark theme. On IPS-type screens that are installed in the Redmi 9C, it doesn't save battery, but it reduces the load on rendering the interface at night, making it easier for your eyes to work.
Managing Autoboot and Background Processes
One of the main reasons for slowdown is the many apps running with the system. In Android and MIUI, this is implemented for fast notifications, but on budget devices this leads to a shortage of RAM.
Go to the app settings and find the AutoStart section, and here you'll see the full list of programs that start right after you turn on your phone. Leave only instant messaging apps on, which make instant notifications critical to you. The rest, including stores and games, turn off.
It is also worth checking the section "Advanced settings» → «Battery and performance. Some firmware versions have a Memory Extension feature that takes some of the internal memory into virtual RAM. For Redmi 9C With its type of memory, this feature can be inefficient and even slow down the device.
| Type of application | Recommended status | Impact on RAM |
|---|---|---|
| Messengers (WhatsApp, Telegram) | Auto-launching of the VCL | Average. |
| Social media (VK, Instagram) | Auto-start OFF | High. |
| Games | Auto-start OFF | Critical |
| Google System Services | Don't touch it. | Low. |
Background activity is also monitored through the Applications menu» → «Permits» → «Autorun. Make sure that you don't lose the forgotten programs you installed back in. Each one of these programs is a potential source of lag.
Combating System Advertising (MSA)
System advertising is not just an annoyance, but also a serious burden on the processor and Internet channel. msa (MIUI System Ads) process constantly collects data and downloads banner ads, which significantly affects the speed of the budget Redmi 9C.
To turn off personalized recommendations, go to Settings → Passwords & Security → Access to Personal Data. Go to msa and turn off the switch. The system will ask you to wait 10 seconds and confirm the action. This will block the main stream of advertising in the system.
Also, you should disable recommendations in folders and on the desktop. Go to the desktop settings (plug two fingers on the screen) and remove the ticks from the "Recommendations" and "Wallpaper Carousel" items. Wallpaper carousel is especially resource-intensive, as it constantly downloads content from the network.
⚠️ Note: After disabling the msa service, ads in some system applications may not disappear immediately. Requires a complete device restart or wait for 24 hours to update the server policies.
Not only will the ad cut off speed up the work, it will also save mobile internet traffic, which is especially true if you're using a limited-gigabyte tariff, and the clean system is smoother and more predictable.
Network settings and parameter reset
Sometimes, a slow smartphone isn't about the processor, it's about network stack problems. Constant network searches, switching between 3G/4G/Wi-Fi can cause micro-freezes of the interface. Network resets help solve these problems without losing personal data.
To perform the reset, go to Settings → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth. Click Reset. After that, you will have to re-enter the passwords from Wi-Fi networks, but the connection quality and network response speed should improve.
If the problem persists, it may be a case of overcrowded cache DNS. Try prescribing static DNS-Addresses (e.g. from Google 8.8.8.8) in Wi-Fi connection settings, which can speed up browser page opening and online service response.
- 📡 Network reset eliminates configuration errors of communication protocols.
- 🔒 Static DNS Can speed up the resolution of domain names.
- 🔄 Reconnecting communication modules refreshes the connection to the operator tower.
Xiaomi owners should also pay attention to the Network Assistant feature, which automatically switches Wi-Fi to mobile Internet if the signal is weak. On unstable connections, this can cause permanent breaks and lags. Try turning this feature off in the Wi-Fi settings.
Secret code to check the network
Radical measures: Resetting to factory settings
If software methods fail, the most effective way is to reset completely, over the years of use, registry errors, library conflicts, and remnants of remote programs accumulate in the system, and a clean installation returns the smartphone to the “out of the box” state.
Before starting the procedure, make sure to back up all important data to your computer or to the Mi Cloud. Reset will delete absolutely everything: contacts, photos, apps and settings. Make sure that the battery is at least 50%.
To reset, go to Settings → About Phone → Settings Reset → Erase all data. It takes 5 to 15 minutes. Once turned on, the smartphone will be like new. The first 30 minutes it can warm up and run slowly - that's okay, file indexing and application optimization is going on.
⚠️ Warning: After a reset, do not restore all applications from a Google Play backup. Install only the essentials manually. Often, it is the older, unoptimized versions of applications that cause problems after a system reinstallation.
A clean system is the best way to extend the life of an aging device. If even after a complete reset, the Redmi 9C is slow, it may be the physical wear and tear of the drive or the battery degradation that requires hardware intervention.
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Full reset eliminates 95% of software errors and is the most effective way to speed up a smartphone before selling or transferring it to another user.