How to speed up Xiaomi Redmi 9: a complete guide to optimization

Owners of Xiaomi’s popular Redmi 9 budget smartphone may experience a noticeable decline in performance over time, a natural process involving the accumulation of system debris, updating apps and filling internal memory. However, the modern MIUI shell provides many fine-tuning tools to bring the device back to its former sharpness.

In this guide, we will look not only at standard cleaning methods, but also at the hidden features of the system available through the developer menu. Competent optimization Redmi 9 can extend the life of the gadget comfortably without having to replace it. Follow the instructions consistently to achieve maximum effect.

Before we go to radical measures like a full reset, we should try software acceleration methods, which are safe and require no special skills, and system optimization begins with analyzing the current state of the device and identifying bottlenecks.

Analysis and cleaning of system memory

The first step to speed up the Xiaomi Redmi 9 should be a deep cleaning of internal memory. When the storage is more than 85% full, the speed of writing and reading data drops, which causes lags in the interface. Xiaomi’s built-in Security app is able to delete temporary files, but often misses the cache of heavy messengers.

It's recommended that you manually check folders with media files in the Internal Storage/Android/media directory, where Telegram and WhatsApp store gigabytes of photos and videos that you're no longer using, and removing this digital ballast frees up the processor's resources to handle actual tasks.

⚠️ Note: Before deleting files from system folders, make sure they do not contain important documents. Messenger cache can be safely cleared through the settings of the application itself by selecting "Data Use and Storage".

Also worth looking at is the "Other" section of the repository, which often hides the remnants of deleted games or erroneous system logs, and can be cleaned by using third-party utilities like Files by Google, which find duplicates and unused files more efficiently than standard tools.

Once cleaned, be sure to restart the device.This action resets system processes and frees up RAM, which is especially important for low-end processors like the Helio G80 installed in the Redmi 9.

Optimization through the Developer Menu

The most powerful way to visually speed up the interface is to scale up the animations. By default, MIUI has 200-300 milliseconds of transitions, which on a budget hardware can feel like a delay, and reducing that time creates the illusion of instantaneous response.

To access hidden settings, you need to activate the developer mode. Go to Settings → About the phone and quickly press 7 times on the item "Version" MIUI". After the notification “You became a developer” appears in the settings menu, a new section “Additional” or “Extended settings” will appear".

Inside the "Developers" section, look for the "Drawing" subsection, and you're interested in three things: "Window animation," "Jump animation," and "Duration of animation," and change the value of each from a standard 1x to a 0.5x or even off.

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Setting the value "No animation" makes the interface as fast as possible, but it becomes less smooth and a little "twitchy." The optimal balance is 0.5x.

In the same menu, find the item "Background limit of processes." By default, the system decides how many applications to keep in memory. Forced restriction to "No more than 2 processes" will free up RAM for the active application, preventing background lags.

The changes take effect immediately. If you don't like the result, you can always return the original values by selecting 1x. This is a secure software setting that doesn't affect the stability of the Xiaomi Redmi 9.

Managing Autoboot and Background Processes

MIUI is known for its aggressive application management policies, but some programs still manage to sign up for autoboot, which causes the processor to be loaded with third-party tasks immediately after the Redmi 9 is turned on, slowing down the system.

To prevent unnecessary apps from running with your phone, go to Security → Permissions → Auto Start. You only need to leave instant messaging apps (like Viber or Telegram) on. Social media and games should be turned off.

In addition to auto-run, check the charge saving settings for frequently used programs. If you notice that an application is unstable or, conversely, is too actively consuming resources, go to Settings → Applications → All applications, select the desired one and click on “Saving Charge”.

Select No Limits mode only for mission-critical services. For others, leave the MIUI Background Limit, which will prevent the latent activity that often causes sudden interface friezes.

⚠️ Note: Do not disable Google system services and Xiaomi services (Mi Cloud, Mi Account), otherwise the phone may not work correctly or stop syncing data.

Disabling Advertising and System Recommendations

One reason Xiaomi Redmi 9 may seem slow is the ad modules and recommendations built into the system.They consume internet traffic and CPU resources to download content, even if you don't want to.

To turn off the ad, go to the Security settings, click on the gear in the corner, and find "Receive recommendations." The switch needs to deactivate. A similar procedure should be repeated in the Music, Video and Explorer apps.

Also, disable the MSA (MIUI System Ads) service, find it in the application list (you may need to turn on system processes), go to "Other permissions" and disable "Receiving data." Without this permission, the ad module will not be able to download banners.

After this manipulation, the interface will become cleaner, and the load on the network module and the processor will decrease, which is especially true for models with limited RAM, where every megabyte of free memory is worth its weight in gold.

Reset network settings and Wi-Fi

Users often confuse the slow operation of the phone itself with Internet connection problems. If pages load long or YouTube videos are constantly buffered, the problem may not be in the processor, but in network settings.

Redmi 9 should reset your network settings if you change Wi-Fi routers frequently or use mobile Internet from different carriers. Go to Settings → Connection and Sharing → Reset Wi-Fi, cellular networks and Bluetooth.

This operation will remove saved passwords and access point settings, but often solves network sticking problems. Once rebooted, the phone will reconnect to the tower or router, possibly choosing a better channel.

Remember that the Wi-Fi module in budget smartphones can warm up with prolonged load, which causes trottling (reduced frequency).

The Radical Method: Full Reset (Hard Reset)

If none of the above methods helped speed up the Xiaomi Redmi 9, the last and most effective option is a full factory reset, which removes all user data, apps and accumulated system debris, returning the phone to the “out of the box” state.

Before starting the procedure, make sure to back up important data. Photos can be uploaded to Google Photos, and contacts can be synced with a Google or Mi Account account. Also make sure that the battery is at least 50%.

To perform the reset, go to Settings → About Phone → Settings Reset → Erase all data. The system will alert you to the irreversibility of action. Once confirmed, the phone will restart and begin the cleanup process, which can take 10 to 30 minutes.

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Hard Reset eliminates 99% of software errors and conflicts accumulated over the years, ensuring maximum system performance.

⚠️ Warning: After resetting, you will need to enter the password from your Google account, which was the main one on this device (FRP). Don't forget your password!

The first run after the reset will be a long one, as the system re-optimizes applications. Don't panic if the phone is slow for the first 15-20 minutes, which is a normal file indexing process.

Frequently Asked Questions (FAQ)