Why Xiaomi Redmi 9T Fly Wallpaper: Causes and ways to eliminate

You installed new wallpapers on your Xiaomi Redmi 9T, but after a few hours or after the reboot they changed to standard? This problem is familiar to many owners of Xiaomi smartphones, especially on budget models with a shell MIUI. The reasons can be several, from firmware bugs to conflicts with system optimization. In this article, we will analyze all possible scenarios why the wallpaper on the Redmi 9T flies, and give step-by-step instructions for their elimination.

It's important to understand that the Redmi 9T is powered by MIUI, Xiaomi's proprietary shell, which actively manages background processes to save battery life. Sometimes this optimization is harmful: the system can "forget" user settings, including wallpaper. In addition, the problem can be cache failures, launcher conflicts or even hardware constraints. Next, we will go into detail each of the causes and offer solutions that work in practice.

1. Wallpaper reset due to MIUI optimization

The most common reason is aggressive MIUI optimization, which resets wallpaper settings after rebooting or prolonged downtime, because the system considers user wallpaper to be an “uncritical” element and can reset it to speed up work or save resources, which is especially true for the Redmi 9T with its 4 GB of RAM, where MIUI actively cleans the background processes.

To check if optimization is to blame, follow the following steps:

• 🔧 Open the Settings. → Annexes → Application management.
• 🔍 Find the Topics app (or Wallpapers) in the list).
• 🛡️ Click Permissions and make sure all necessary rights are included (storage, auto-run).
• 🔄 Go to the Battery. → Battery Optimization and Add Themes to Exceptions.

If after these manipulations the wallpaper continues to fly, the problem may be deeper - for example, in the crash of the Topic application cache or in conflict with the MIUI update.

2. Conflict with the launcher or MIUI theme

Redmi 9T has a default MIUI Launcher that is tightly integrated with system themes. If you use a third-party launcher (like Nova Launcher or Action Launcher), it can conflict with native wallpaper settings. Even if you haven't changed the launcher, a failure in its operation can cause wallpaper resets.

Check the following:

• 📱 Make sure that wallpaper is installed through the standard Themes app, not through third-party programs.
• 🔄 If you use a third-party launcher, try temporarily returning it. MIUI Launcher and check if the wallpaper will remain.
• 🛠️ Reset the launcher settings: go to Settings → Annexes → Application management → MIUI Launcher → Warehouse → Clear the data.

⚠️ Warning: Launcher data reset will return the standard desktop view, including the location of icons and widgets.

If the problem disappeared after the launcher was reset, but then returned, it may be the MIUI update that is to blame. Some versions of the firmware for the Redmi 9T (for example, MIUI 12.5 or MIUI 13) had wallpaper saving bugs, in which case a rollback to a stable version or manual patch installation will help.

Failures in the "Themes" annex

The Themes app (or Wallpapers in global versions of MIUI) is responsible for installing and storing wallpapers, and if it doesn't work properly -- for example, because of a damaged cache or a conflict with other services -- the wallpaper can fly off, most often after a MIUI update or a system data cleanup.

To remedy the situation:

1. Go to Settings → Applications → Application Management → Topics.
2. Click Warehouse → Clear the cache and Clear the data.
3. Restart your smartphone and try to install the wallpaper again.
4. If it doesn’t work, remove the Themes app updates (if there’s an option) and go back to the factory version.

Sometimes reinstalling the Themes app through MIUI Themes Store helps, but this requires a Xiaomi account and may not work on all regional versions of the firmware. If the wallpaper still flies after cleaning the cache, the problem may be in the firmware itself — about this in the next section.

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Before cleaning the data of the application "Themes" save your favorite wallpaper in the gallery - after resetting, they will disappear from the list of installed.

4.Firmware bugs MIUI: problem

Some versions of MIUI for Redmi 9T contain bugs that prevent the system from saving custom wallpaper settings. For example, MIUI 12.0.8 and MIUI 12.5.2 have reported complaints of spontaneous wallpaper reset after an update or reboot. Xiaomi usually fixes such bugs in the next patches, but if you don't want to wait, you can act on your own.

Here's what we can do:

• 🔄 Check for updates: Settings → The phone. → Updating the system.
• 📥 If there are no updates, try manually installing the latest stable version. MIUI via Recovery or Fastboot.
• 🔙 If the problem appears after the update, roll back to the previous version (requires an unlocked bootloader).

If you don’t want to risk firmware, an alternative is to use third-party wallpaper apps (such as WallpapersCraft or Backdrops) that save settings regardless of MIUI. However, this can lead to other problems, such as increased battery consumption.

5. Memory shortage or storage failure

Redmi 9T is available in versions with 64 GB and 128 GB of memory, but even this may not be enough if the system is clogged with cache or temporary files. When free space runs out, MIUI begins to clean up "non-critical" data, including user wallpaper.

To rule out this cause:

• 📊 Check the free space: Settings → Storage.If less than 5GB is left, clear the cache and delete unnecessary files.
• 🔍 Start the storage check: Settings → Memory. → Cleaning (use the built-in cleaning utility).
• 🔄 If the wallpaper is kept on SD-Try to transfer them to your internal memory — MIUI Sometimes it works poorly with external storage devices.

⚠️ Warning: If the smartphone often overheats or brakes when working with wallpaper, this may indicate hardware problems with memory.

Also worth checking is that the wallpaper is in Live Wallpaper format, which consumes more resources, and MIUI can reset it to save charge. Try.jpg or.png static wallpaper with a resolution corresponding to the Redmi 9T screen (1600×720 or 2340×1080).

6. Conflict with Google Wallpapers or other services

Many Redmi 9T users install Google Wallpapers or other third-party wallpaper apps without knowing they might be in conflict with MIUI. For example, Google Wallpapers sometimes overwrites wallpaper settings, especially if Daily Update is enabled. The same can happen with wallpaper from Microsoft Launcher or Samsung Themes.

To avoid conflict:

• 🚫 Remove third-party wallpaper apps or disable auto-update in them.
• 🔧 In Google Wallpapers settings, turn off the Daily Wallpaper option.
• 🛠️ If you use Google Launcher, go back to the standard. MIUI Launcher.

A critical feature of Redmi 9T is that if you install wallpapers through Google Wallpapers, they are saved in the /data/data/com.google.android.apps.wallpaper/ folder, which is cleared when you reset the cache. MIUI does not recognize them as "system" wallpapers, so it resets them to standard ones.

Delete Google Wallpapers | Disable Auto-Update Wallpapers | Return MIUI Launcher | Clear the Themes app cache-->

7 Hardware problems: damage to memory or firmware

If none of the software methods worked, the problem could be hardware.

• 💾 Damage to the memory partition where system settings are stored (including wallpaper).
• 🔌 Memory controller failure, which prevents the system from storing user data.
• 🔧 Incorrect firmware (for example, if you installed custom software not for Redmi) 9T, and for another model).

In such cases, only:

1. Complete reset (Settings → Additional → Resetting).
2. Fastboot flashing (requires an unlocked bootloader).
3. Contact the service center if the problem is hardware.

⚠️ Warning: If after resetting the wallpaper still flies, do not try to sew the smartphone yourself without experience.

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If the wallpaper flies even after resetting to factory settings, there is a 90% probability of a hardware problem (damage to memory or controller).

Frequently asked questions