Why Xiaomi Phone Slows Down After Updating and How to Fix It

The situation when the flagship or budget smartphone Xiaomi starts to work slower immediately after installing a new version of the operating system, familiar to many users. Instead of the expected performance gains and new features, the owner receives interface lags, long application responses and increased battery consumption.

There are several fundamental reasons why Xiaomi is slowing down after the upgrade, including a routine file optimization process that takes time, and software conflict related to accumulated system debris, and in some cases, hardware limitations of older models that struggle to cope with the increased demands of the new MIUI or HyperOS shell.

In this article, we will discuss in detail all possible causes of slowing down the device and provide step-by-step instructions for troubleshooting, you will learn when to just wait, and in which cases radical intervention is required to restore the previous speed.

Background optimization of the system and data indexation

The first and most common factor causing time lags is the background optimization process. Once the firmware update is in place, the Android operating system underlying MIUI must re-index files and optimize installed applications for new libraries and kernels, a process that can take anywhere from 30 minutes to several hours depending on the amount of internal memory and the number of programs installed.

During this period, the device's processor is working at a higher load, which can also cause the case to heat up. If you've just upgraded and started using the phone immediately, you may notice twitching animations. The system prioritizes background tasks, which can cause the interface to react with a delay.

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Let your smartphone lie on a charge with Wi-Fi connected for 1-2 hours after the update without touching it, which will speed up the completion of background processes.

It's important to understand that stopping this process artificially can lead to instability in the future. If you interrupt the optimization, the system will have to start again the next time it starts, which will put strain on the processor and battery again. Patience in the first hours after the upgrade is a key factor in stability.

• 📉 High CPU load in the first hours after start.
• 📂 Re-indexing media files and contacts.
• ⚙️ Adaptation of applications to new system libraries.
• 🔋 Possible temporary increase in energy consumption.

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If the phone brakes in the first 2-3 hours after the update, this is a normal phenomenon that requires time to complete background processes.

Cache conflicts and residual files

A more serious problem requiring user intervention is the conflict between old system files and the new firmware version: When you upgrade over the air (OTA), old files are not always deleted correctly, but accumulate as a cache, which creates a situation where the device’s memory is filled with temporary data that prevents the updated components from working properly.

This is especially true for users who jump through one or two versions of the operating system, such as switching from MIUI 12 to MIUI 14 without intermediate steps often leads to errors in the directory structure, which results in the phone starting to “think” when opening menus or running heavy applications.

⚠️ Warning: Accumulation of system debris after major updates can lead not only to lags, but also to cyclical device reboots if critical configuration files are damaged.

To solve this problem, it is recommended to clean the cache through the Recovery Mode. This is a secure procedure that does not delete your personal data (photos, contacts), but cleans temporary system files. Before performing actions, make sure that the battery is at least 50%.

Hardware Limitations and HyperOS Requirements

And the physical aspect is also important: operating systems are becoming more hardware-intensive every year, and new shells like HyperOS are introducing complex visuals, widgets, and background services that can be redundant for budget models or smartphones that were released more than 3-4 years ago.

If your Xiaomi has less than 4GB of RAM or an entry-level processor (like the Snapdragon 4xx series or the old MediaTek Helio), installing the latest available firmware can become “hard” for the device.

The table below gives approximate requirements for comfortable operation of modern shells:

Errors in the firmware version itself

Often the problem is not your device, but the unfinished version of the software. Xiaomi regularly releases updates, but in the pursuit of the release schedule, Global ROMs sometimes get bugs, especially for the first versions of stable builds that have not been tested enough in real conditions.

Users may experience specific problems, such as a memory leak in a particular application, a conflict of drivers of the communication module or an error in the touch screen. If you upgraded and the phone began to slow in certain scenarios (for example, only when typing or only in the camera), most likely it is a software bug.

You can check for known problems on the official Xiaomi forum or in thematic communities. If the bug is confirmed by many users, you can wait for the release of the Security Patch patch or the firmware fix, in some cases, cleaning the data of the problematic application helps.

Failures in Google services and synchronization

Another hidden reason for the slowdown is the active synchronization of data immediately after the update, and once the system is reinstalled or updated, Google Play Services, Google Photos, OneDrive, and Mi Cloud services begin to check for changes to files and upload new data, putting a huge strain on the network module and disk subsystem.

If you have thousands of photos in a gallery, the process of indexing them and uploading them to the cloud can take days, and at that time the phone can get very hot, and the interface can work in jerks, and it's not a breakdown, it's an intense exchange of data.

To minimize the impact of this factor, you can temporarily limit background data transfer for heavy applications. Go to Settings → Apps → All applications, select the desired application (such as Google Photos) and limit background activity or turn off sync until the device returns to normal.

• 🔄 Mass download of contact and message backups.
• 📸 Indexing of the new photo library.
• ☁️ Synchronization of documents with cloud storage.
• 📲 Update the list of installed apps in Google Play.

Radical methods: Reset to factory settings

If neither waiting nor clearing the cache helped, and the phone continues to slow down, the last and most effective method is a full reset to factory settings (Hard Reset), which completely deletes all user data, settings and applications, returning the device to a “store-like” state, but with the new firmware version already installed.

This method eliminates all possible software conflicts accumulated over the years of use. After reset, the system works as quickly as possible, since the file system is free of fragmentation and debris. However, before performing the reset, make sure to create a full backup of all important data, as it will be impossible to restore it without a backup.

⚠️ Warning: Full reset deletes all data, including photos, contacts, messages and accounts. Make sure you remember the password from your Mi and Google account that you will need to activate your phone after reset.

You can reset via the settings menu: Settings → About Phone → Settings Reset → Erase all data. If the phone does not turn on or brakes so badly that the menu is not available, you can start the procedure through Recovery Mode by selecting Wipe Data.

Prevention and proper operation

To avoid situations where Xiaomi slows down after an update, you should follow simple rules of operation: do not fill the internal memory of the device completely - always leave at least 10-15% of free space for the correct operation of the file system and caching.

It is also recommended not to miss major updates if you use the device for a long time; it is better to update gradually, as new versions come out, so that the system adapts smoothly. Regularly rebooting the smartphone (at least once a week) also helps to clear RAM from hanging processes.

Watch the temperature of the device. Constant overheating leads to trottling, a forced decrease in the frequency of the processor to protect against damage, which directly affects the speed of the interface. Remove a thick case during heavy tasks and do not use the phone in direct sunlight.

• 🧹 Regularly remove unused applications.
• 🔄 Reboot the device once in a while. 3-5 days.
• 💾 Make sure that there is a minimum of freedom. 5-7 GB memory.
• 🌡️ Avoid overheating the body during charging.

Frequently Asked Questions (FAQ)