Xiaomi Redmi 9 Lags: What to Do to Speed Up Work

Xiaomi Redmi 9, released in 2020, is still a popular device due to its availability and balanced performance. However, owners often find that after a year or two of active use, the device starts to work slower, applications open longer, and the interface has delays. This is a natural process for any gadget, but in the case of budget models it is more noticeable due to less productive iron.

The main reason for the performance decline is the accumulation of software debris, the fragmentation of the file system and the weighting of the MIUI operating system with each update. When you install new applications, they leave behind a cache that takes up gigabytes of usable space over time, and if the internal memory is more than 85% full, the system begins to experience difficulties reading and writing data, which directly affects the smoothness of the work.

In this article, we’ll look at the specific steps to help your Redmi 9 get back to speed. We’re not going to use the questionable “accelerators” from the Play Market, which consume resources themselves, but we’ll turn to proven system settings and deep cleaning methods. Following the instructions, you can extend the life of the device without having to buy a new gadget right now.

Analysis of memory and storage load

The first thing you need to do when you have lags is to audit your space. Android requires free space to create temporary files and swaps. If your model with 32 or 64 GB of memory is full, braking is inevitable. You can check the status through the standard menu, where the system will tell you that the place is running out.

Special attention should be paid to the folders of messengers such as Telegram or WhatsApp, which have the property of accumulating gigabytes of media files that are often not needed by the user, but take up precious resources. Deleting old videos and cleaning the cache can instantly release 3-5 GB, which will significantly affect the speed of work.

• 📱 Go to Settings. → Storage and estimate the percentage of internal memory.
• 🗑️ Use the built-in “Security” app to automatically clean garbage files.
• 📸 Check the Recycle Bin folder in the gallery, as deleted photos often continue to take up space.

It's also worth checking which apps consume the most RAM (RAM) -- Redmi 9 has 3 or 4GB of RAM, which can be a bit short for today's heavy applications. If background processes eat up all available memory, the system starts to force the active tabs to close, causing the interface to reboot.

⚠️ Warning: Do not fill the internal memory of the device completely. For stable operation of the system, always leave the minimum free. 10-15% total storage.

Optimization of MIUI interface and animations

MIUI is known for its visual richness, but it's the beautiful transitions and effects that often create the illusion of slow work on low-end processors. Cutting down animation is a proven way to make the system respond visually faster. It doesn't add power to the processor, but it reduces the wait time for the interface to respond.

To access the hidden settings, you'll need to activate the developer mode, which is a secure procedure that allows you to fine-tune the system, and once activated, you can change the speed of the animation of the windows, the transitions, and the duration of the animator.

Change the animation settings through the developer menu. Find the section related to drawing, and change the values of the scale of the animation window, transition and duration of the animator from the standard 1x to 0.5x. Visually the smartphone will become more responsive.

• 🔧 Open the Settings. → About the phone and 7 times click on the "Version" MIUI».
• ⚙️ Go to Settings. → Additional settings → For developers.
• 📉 Find the “Scale of Animation” items and set the value 0.5x Or turn them off.

Another effective step is to turn off unnecessary visuals, such as live wallpapers or widgets with constantly updated content, which not only load the processor, but also consume battery power, which collectively reduces overall performance.

Managing Autoboot and Background Processes

Many apps tend to run with the smartphone on and continue to run in the background, consuming resources. In Redmi 9, autoboot control is critical to keeping the speed up. The system allows you to manually prevent unnecessary programs from running.

Also, check the list of apps that are allowed to run in the background without restrictions. Social networks and instant messengers are often left there, but games or stores may be limited, which will help free up RAM for current tasks.

There's also a memory extension feature that uses a portion of internal storage as virtual RAM. On low-RAM devices, this can help, but on Redmi 9 with its memory type, the effect can be mixed. If you have a fast memory card installed or storage filled, it's best to experiment with turning this feature on and off.

⚠️ Warning: Disabling system processes that you don't know the names of can cause the phone to run in an unstable way.

Resetting network settings and resetting applications

Sometimes the lags are not related to overall performance, but to problems with network modules or specific applications. If the phone hangs when trying to connect to Wi-Fi or slow loads pages, it is worth resetting the network settings. This will not delete your personal data, but return the network settings to factory ones.

It's also useful to reset applications, which will return all programs to a post-installation state by clearing their cache and temporary files, but keeping your data inside them, often solving problems with specific services hanging over.

To perform a network reset, go to Settings → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth. After the procedure, you will need to re-enter passwords from wireless networks.

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Before resetting your network settings, make sure you remember passwords from important Wi-Fi networks, as they will have to be re-entered.

Check for malware and updates

Despite the built-in protection, Android devices sometimes appear advertising viruses or miners that quietly load the processor. If you notice that the phone warms even in simple, or pops up ads in unexpected places, you need to do a deep check.

Use the built-in scanner in Xiaomi’s Security app or install a reliable antivirus from a well-known vendor, such as Dr.Web or Kaspersky. After checking, remove any suspicious apps, especially those that have been installed recently and do not have an icon.

Also, don't ignore system updates. While newer versions of MIUI can be heavier, they often contain security patches and model-specific optimizations. Check for updates in the Settings → About Phone menu.

• 🛡️ Run a full check through the built-in Security app».
• 📲 View the list of installed apps and remove unknown ones.
• 🔄 Check for system updates in the corresponding menu section.

⚠️ Warning: Avoid installing cleaners and accelerators from third-party sources, which often contain ads and slow down the system themselves.

Radical measures: complete reset and reflashing

If the software methods did not help and Xiaomi Redmi 9 continues to lay, the last effective way is a complete reset to factory settings (Hard Reset), which will completely clean the device of user data, settings and accumulated over the years of use of software debris.

Before performing this procedure, be sure to create a full backup of all important data to the cloud service or computer, as it will be impossible to restore them after reset without a backup.

To perform the reset, go to Settings → About Phone → Settings Reset → Erase all data. The process will take a few minutes, after which the smartphone will turn on as new. In most cases, this returns the device 90-95% of its original performance.

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Full reset (Hard Reset) is the most effective means of combating software lags, eliminating accumulated errors of the file system and registry.

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