How to Clean Xiaomi 9A: From Software Rubbish to Physical Cleanup

Xiaomi Redmi 9A is one of the most popular budget smartphones, but even it eventually begins to “brake” due to the accumulated debris. Unlike the flagships, the 9A has limited resources: only 2/3 GB of RAM and 32/64 GB of memory, so regular cleaning is not a luxury, but a necessity. In this article, we will analyze all the methods of cleaning – from removing unnecessary files to physically cleaning the case, and also explain why the standard “Optimizer” in MIUI is often useless and how to circumvent its limitations.

The problems begin after 3-6 months of active use: apps open long, MIUI hangs, and the space is melting away, and not only user data, but also system debris — update remnants, Google Play Services cache, duplicate photos and tails of remote programs. We tested all methods on Redmi 9A with MIUI 12-14 firmware and identified those that actually work.

1. Memory Cleanup: Delete Unnecessary Files and Applications

The first step is to make room for internal memory. On the Xiaomi 9A, this is critical: when the drive is 90% full, the system aggressively kills background processes, leading to lags. Start with manual revision:

• 📁 Downloads: folder /storage/emulated/0/Download often-cluttered APK, Delete anything that is not used.
• 📸 Duplicate photo: Gallery MIUI It does not always show duplicates, but they can be found through Google Photos (Utilities section» → «Clear the place»).
• 🎵 Offline music: Spotify cache, Yandex Music or VK Music can weigh gigabytes. Cleared in each app's settings.
• 🗑️ Basket: In MIUI Deleted files are stored in the Recycle Bin for 30 days. → Basket.

For deep cleaning, use the built-in tool:

1. Go to Settings. → Memory.
2. Click “Clean” next to the “Junk Files” section.
3. Select categories: app cache, unused APKs, update remnants.

⚠️ Note: Do not clear the cache of system applications (e.g. com.android.systemui) through Settings → Applications: This can lead to disruptions MIUI.

2.Cache optimization: what can be deleted and what can not

Cache speeds up applications, but Redmi 9A has a surplus of it that slows down the system, so let's see what data is safe to clean.

For automatic cleaning, install SD Maid (requires root) or Files by Google. Recent tests have shown that Files by Google finds 20 to 30% more garbage than the built-in MIUI optimizer:

Remove social media cache|Clear Google Play Services data (cache only!)|Check the folder. /Android/data on the remnants of remote games|Reboot your phone after cleaning-->

Important: Don't confuse Clear cache and Clear data! The second deletes all the app settings (like WhatsApp logins).

3. Cleaning System Processes: How to Stop Background Tasks

The Xiaomi 9A suffers from aggressive background consumption — even when it is on standby, the battery goes down in a matter of hours — because of MIUI and Google, which are the systems services that tame them:

• 🛑 Turn off autostart: Settings → Annexes → Application management → Autostart, turn off everything except messengers.
• 🔄 Limit background activity: in the same app settings, select “Limit background activity».
• 📴 Freeze unnecessary services: through ADB Turn off com.miui.analytics (statistics collection) and com.xiaomi.midrop (Mi Drop).

For advanced users, a command to disable ads in MIUI (requires ADB):

adb shell pm uninstall --user 0 com.miui.systemAdSolution

⚠️ Note: Disabling system services through ADB It may result in incapacity MIUI Account or Topics: Backup before experimenting!

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If after cleaning the background processes, the phone has become slower to open applications, return auto-run for frequently used programs (for example, WhatsApp or 2GIS).

4 Physical Cleansing: How to Remove Dust and Dirt Without Damage

Redmi 9A has no IP68 protection, so dust and moisture easily penetrate the inside. Clean the case and connectors at least 1 time every 3 months:

• 🧹 Speakers and microphone: use a soft brush (for example, for drawing) or a toothpick with cotton wool!
• ⚡ Type-C connector: Clean with a plastic spatula (come complete with some covers) or compressed air (canister).
• 📶 Slot SIM-cards: blow out dust and wipe the contacts with an alcohol tampon (at least 70% alcohol).

To clean the screen, use a microfiber wipe and a special spray (for example, Klear Screen).

• Household detergents (even diluted).
• Paper towels or toilet paper (scratching oleophobic coating).
• Alcohol in its pure form (destroys the adhesive layer around the display).

5. Reset to factory settings: when necessary

If all previous methods failed, a hard reset remains, which will delete all data, including accounts, photos and settings. Redmi 9A resets in two ways:

1. From the settings menu: Go to Settings → About Phone → Reset. Select “Erase All Data.” Confirm the action and wait for the reboot.
2. Using Recovery Mode (if the phone doesn’t turn on): Turn off Xiaomi 9A. Press Power + Volume up until the Mi logo appears. Select Wipe Data → Wipe All Data (control – volume and power buttons).

After discharge:

• 🔓 Unlock Bootloader if you plan to install custom firmware.
• 🔄 Update. MIUI Up to the latest version through Settings → Updating the system.
• ☁️ Restore data from a backup (if it was created via Mi Cloud or Google Drive).

⚠️ Attention: On Redmi 9A firmware MIUI 13+ After reset, you may need to link to your Mi Account if you previously enabled Find Device. Without a login and password, the phone will become a brick»!

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Resetting to factory settings is a last resort. Before you do, try rolling back the MIUI update (if the lags started after the update) or removing problematic apps through Safe Mode (click Power → hold “Switch off” → select Safe Mode).

6. Alternative methods: root, custom firmware and ADB

If you're willing to take risks, getting root rights will open up access to deep optimization. On Xiaomi 9A, this allows you to:

• 🗑️ Remove Built-in Garbage (Mi Browser, Mi Music, Mi Video).
• ⚡ Disable background services (com.xiaomi.mipicks, com.miui.hybrid).
• 🔧 Install Magisk for module management (e.g. Universal) GMS Doze to save battery).

Instructions for unlocking Bootloader:

1. Link your Mi Account to your phone in Settings → Mi Account.
2. Go to en.miui.com/unlock and request permission to unblock.
3. Download Mi Unlock Tool, connect your phone in Fastboot mode (clip Power + Volume down) and follow the program instructions.

To install custom firmware (such as LineageOS or Pixel Experience) you will need:

1. Unlocked Bootloader.
2. Established TWRP Recovery (Redmi version) 9A — twrp-3.7.0_dandelion).
3. A firmware compatible with the device code name (dandelion for 9A).

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Before you run the firmware, check the MIUI version through Settings → About Phone → MIUI version. If it’s Global, custom firmware may not stand up without first switching to EEA or China ROM.

7.Prevention: How to avoid repeated clogging

To prevent Xiaomi 9A from becoming a digital junkyard in a month, follow these simple rules:

• 📥 Turn off auto-update apps on Google Play (set notifications for available updates).
• 📂 Use cloud storage (Google Photos, Yandex Drive) to automatically upload photos and videos.
• 🔋 Install a light launcher (like Nova Launcher or Lawnchair) instead of the standard launcher. MIUI Launcher.
• 🛡️ Regularly check the permissions of applications in Settings → Confidentiality → Permits: Revoke access to contacts/geolocation from unnecessary programs.

To monitor the system status, install:

• AccuBattery – tracks battery wear.
• SD Maid scans garbage every week.
• Greenify – suspends background processes (requires root for full functionality).

FAQ: Frequent questions about cleaning Xiaomi 9A