Why Xiaomi Redmi is slowing down 9A: All causes and methods of elimination

Xiaomi Redmi 9A

slow-motion

Redmi 9A

lay down

In this article, we will look at all possible causes of brakes, from overloaded memory to hardware malfunctions, and give step-by-step instructions for diagnosing and troubleshooting. G25, limited 2 GB of RAM and features of firmware MIUI. You will learn how to distinguish software lags from hardware breakdowns, and when to carry the phone to the service.

If a smartphone starts to slow down after 1-2 years of active use, this is normal for a budget device, but a sharp deterioration in performance often signals a specific problem - and it can be fixed.

1. Overloaded RAM is the main cause of lags

Redmi 9A

2 GB of RAM

MIUI

1 GB of RAM

Telegram

YouTube

critical resource shortfall

hang over

How to check the loading of RAM:

1. Open Settings → About the phone → System status.
2. Click on “Memory” (or Settings) → Annexes → Memory status in new versions MIUI).
3. Look at the RAM usage chart. If it's less than 300-400 MB, it's critical.

What do I do?

• 🔄 Close background applications manually through the "Recent" button (swipe up and hold). MIUI malfunction.
• ⚡ Turn off autoloading of unnecessary apps: Settings → Annexes → Autostart control.
• 📱 Use the Lite versions of apps (e.g. Facebook Lite, Messenger Lite) that consume 2-3 times less RAM.
• 🚫 Remove widgets from the main screen – they are constantly hanging in the memory.

⚠️ Warning: Don't believe the "radiation optimizers" from Google Play! not only do they not help, they can also impair performance, putting additional strain on the processor.

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If your smartphone slows down when you open your camera, close all background apps in advance. 9A Requires up to 500 MB of RAM for stable operation.

2.Pulled storage: why 32GB is not enough

Redmi 9A

32 GB of internal memory

~22-24 GB

more than 80%

slow down

• The system cannot create temporary files for the cache.
• MIUI Starts to “clean up” memory in the background, which eats up the resources of the processor.
• Applications cannot update or save data.

How do I check the vacant space?

Go to Settings. → If you're less than 3-4GB free, it's time to clean up!

Ways to make room:

• 📸 Transfer your photos and videos to a memory card or cloud (Google Photos, Mi Cloud).
• 🎵 Remove downloaded music and podcasts (Download folder often weighs several gigabytes).
• 🗑️ Clear the app cache: Settings → Annexes → Select the application → Clear the cache.
• 🔍 Find and delete large files using the built-in analyzer: Settings → Warehouse → Analysis of the vault.

⚠️ Note: If the memory is quickly filled up after cleaning, check the smartphone for viruses (see section 4.

3.Outdated firmware and MIUI errors

Xiaomi

Redmi 9A

MIUI

bug

• Interface freezes.
• Spontaneous reboots.
• Increased battery consumption and heat.

How do you update the firmware?

1. Go to Settings → About the phone → System update.
2. Click on "Check Updates."
3. If a new version is available, download and install it (preferably via Wi-Fi).

What to do if the update does not help?

• 🔄 Reset the settings to factory settings (see Section 6).
• 🛠️ Install custom firmware (like LineageOS), but it requires unlocking the bootloader and risks voiding the warranty.
• 📱 Reverse to the stable version MIUI, If the current one contains critical bugs (instructions on the forum) 4PDA).

4. Viruses and malware: a hidden threat

Redmi 9A

virus

mining-bot

• Uses the resources of the processor for mining cryptocurrency.
• Sending. SMS pay-per-room.
• Shows hidden advertising in the background.

Signs of infection:

• The smartphone heats up for no reason (even in simple).
• The battery is discharged in a few hours (in normal use).
• Unknown apps or pop-ups appear.
• Internet traffic is consumed at night when the phone is not in use.

How to check and remove viruses?

1. Install an antivirus (Malwarebytes, Dr.Web Light) and scan the system.
2. Check the list of installed applications: Settings → Annexes → All applications: Remove suspicious ones (e.g., with names like com.system.update or android.service).
3. Disable the installation from unknown sources: Settings → Applications → Special Rights → Install Unknown Applications.

5. CPU overheating: why Redmi 9A «numb

MediaTek Helio processor G25 redmi 9A It is prone to overheating, especially when:

• Long-term games (even in simple projects like Brawl Stars).
• Launch heavy applications (TikTok, Facebook, Google Maps).
• Charging the smartphone during use.
• Being under direct sunlight.

When the temperature is 45-50°C triggers trottling, which artificially reduces the performance of the processor to avoid damage, and as a result, the smartphone begins to slow down, twitch, and slowly respond to pressing.

How do you avoid overheating?

• ☀️ Do not use your phone in the sun or in stuffy areas (such as in your car in the summer).
• 🔌 Do not play while charging - it increases the heat.
• 🧊 Remove the case (especially silicone) - it worsens the heat sink.
• 🛠️ Clean the charger connector from dust - the accumulation of dirt interferes with cooling.

What to do if the smartphone has already overheated?

1. Turn it off for 10-15 minutes.
2. Place it on a cool surface (not in the refrigerator!).
3. After cooling, check the temperature through the app. AIDA64 or settings → The phone. → Status of the system.

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If Redmi 9A overheats even in a simple (for example, when watching a video), this may indicate a malfunction of the battery or thermal paste - diagnostics are required in the service.

6.Reset to factory settings: Last chance

If all previous methods failed, the last resort is a hard reset, which will delete all data, but return the smartphone to a “clean” state, as after buying.

When should I do the reset?

• The smartphone slows down even after cleaning the memory and updating.
• Artifacts appeared on the screen or constant reboots.
• You suspect a virus that is not removed by the antivirus.

How do you do the reset?

Back up your photos and contacts (via Mi Cloud or computer)

Write down logins/passwords from important accounts

Make sure the battery is at least 50% charged.

Take out the memory card (if you don’t want to format it)-->

1. Go to Settings → About Phone → Backup and Reset.
2. Select "Settings Reset."
3. Confirm the action (a password may be required).
4. Wait until it is completed (it will take 5-10 minutes).

What do I do after the dump?

• 🔄 Don’t restore all data at once – it can boot the system again.
• ⚡ Install only the necessary applications (without “garbage»).
• 📱 Turn off auto-update apps on Google Play.

⚠️ Note: If the lags remain after reset, the problem is guaranteed hardware (for example, a malfunction of flash memory or processor.

7. Hardware malfunctions: when it's time to go to service

If software methods didn't work, the cause of the brakes could be iron. - For Redmi 9A typical of the following breakdowns:

How to diagnose a hardware problem?

• 🔧 Check your smartphone on another charger – sometimes lags are caused by unstable power.
• 🔄 Run in Safe Mode (hold the power button) → «Safe Mode Reboot. If it doesn't have lags, the software is the problem.
• 🛠️ Test the iron through AIDA64 or CPU Throttling Test (Trottling Test).

Cost of repair (approximately):

• Battery replacement: 1,000–1,500 ₽.
• Fastboot Flashing: 500–1,000 ₽.
• Repair/replacement of memory module: 2,000–3,500 ₽.
• Diagnostics + dust cleaning: 300-800 ₽.

⚠️ Warning: If your smartphone falls or gets wet, don't turn it on! This can short-circuit and completely fail.

FAQ: Frequent questions about lags at Redmi 9A