Why Xiaomi Redmi is slowing down 9A How to Fix It: The Complete Guide

Xiaomi Redmi 9A — One of the most popular budget smartphones, but even it's not immune to performance problems. If your device starts to hang, slowly open apps or overheat, don't rush to carry it into service: in 90% of cases, the brakes can be eliminated yourself. In this article, we will analyze all possible causes - from clogged memory to firmware errors - and give step-by-step instructions taking into account the features of this model.

Feature of Redmi 9A It runs on a MediaTek Helio processor. G25 everywhere 2/3 This makes it vulnerable to overload, but when set up properly, even that modest hardware potential can be maximized. We won't advise "buying a new phone" -- instead, we'll show you how to squeeze out your Redmi. 9A best.

1.Diagnosis: Why exactly is your Redmi slowing down 9A

Before you start "treatment," you need to understand the source of the problem. 9A Usually associated with one of 5 reasons:

  • 📱 Lack of RAM – applications close themselves or take a long time to load.
  • 🗑️ Scored internal memory – less than 1 GB of free space is critical for MIUI.
  • 🔥 Overheating of the processor – the phone becomes hot, begins to “trouble".
  • 🐞 Firmware errors – glitches after updating or incorrect installation MIUI.
  • 🦠 Viruses/Background Processes – Advertising in Games, Hidden Mining Scripts.

To accurately identify the problem, perform a quick check:

  1. Open Settings → About Phone → MIUI version and check the relevance of the firmware.
  2. Launch Security → Accelerator (built-in MIUI) — See which apps are loading the system.
  3. Install the app AIDA64 (Free in Play Market and check: CPU Temperature (normal to 45)°C in plain time. RAM employment (if available) < 300MB critical. Battery condition (wear and tear) > 30% impact on productivity).
📊 What's stopping you at Redmi? 9A often?
Apps open long time
The phone is warming and laying
Lack of memory for photos
Games are slowing down
Other

⚠️ Note: If the phone is only braking in a particular application (e.g., in the PUBG Mobile or TikToke, the problem is not the system, but the graphics settings of this software. Check the parameters Graphics quality and frame rate in the game settings.

2.Memory Cleanup: How to Free Up Space on Redmi 9A

The most common cause of brakes is a clogged internal memory.Redmi 9A It comes with 32 GB (of which it is available) ~24GB), and when less than 1GB of space is left, the system goes into emergency mode:

2.1 Delete unnecessary files manually

  • 📁 App cache: Go to Settings → Annexes → App management, select any app (e.g. YouTube) and click Clear Cache. Repeat to 5-10 the hardest programs.
  • 🗑️ Garbage Files: Use the built-in cleaner in MIUI (Security → It finds temporary files, deleted applications and duplicates.
  • 📸 Photo and video: Transfer media files to SD-Map or cloud (Google Photos, Mi Cloud) Delete screenshots and repetitive images.

Transfer of annexes to SD-map

Redmi 9A Supports memory cards up to 512GB, but not all apps can be ported:

  1. Put it in. SD-map (recommended class) UHS-I U1 higher).
  2. Go to Settings → Applications → Application Management.
  3. Select an app (such as Facebook) and click Move to SD-map.
  4. If the button is inactive, the app does not support portability (this is Android’s restriction, not Android’s). MIUI).

☑️ A checklist for cleaning up memory

Done: 0 / 5

⚠️ Warning: Do not use "memory optimizers" from the Play Market (such as Clean Master or CCleaner). They often contain ads and cause the brakes themselves. MIUI All the necessary tools are already in place!

3. RAM optimization: how to reduce memory load

Redmi 9A s 2 GB RAM requires a special approach to memory management, if the background is more 5-6 And the system starts to hang. Here's how to fix it:

Background processes offline

  • 🚫 Limit Autostart: Go to Settings → Annexes → Application management → Auto-run and disable auto-boot for unnecessary programs (such as games or social media).
  • ⚡ Optimize. MIUI: Turn on the settings. → Special facilities → Optimization MIUI (Improves memory management).
  • 🔄 Use the Lite versions of apps: Replace Facebook with Facebook Lite, Messenger with Messenger Lite, etc.

3.2 Developer setup to accelerate

Hidden settings For developers allow you to fine-tune the performance:

  1. Activate Developer Mode: Go to Settings → About Phone and click on MIUI Version 7 times.
  2. Back to Settings → Additionally. → For developers and set: Limiting processes in the background → Maximum 2 process: Windows animation, transition animation, Animator duration → set it off or 0.5x. Don't keep up → On (reduces the load on RAM).

💡

If you change the developer's settings, you can get your phone back to its original state, and some parameters, like process limitations, may conflict with your phone. MIUI.

Forced stop of memory-eating applications

Some apps (e.g. TikTok, AliExpress, ad games) continue to work in the background even after they are closed, to kill them:

  1. Open Settings → Applications → Application Management.
  2. Select a “gluttonous” app (like Likee).
  3. Press Forced Stop and Clear the Cache.
  4. Turn off notifications for this app if they are not critical.

To check the temperature:

  1. Install. AIDA64 or CPU Monitor.
  2. Run a load test (such as a game) and watch the temperature chart.
  3. If the temperature is higher 60°C – Close all apps immediately and let the phone cool down 10-15 minute.
What happens if you ignore the heat?
Long-term operation at higher temperatures 70°C can lead to: - Battery degradation (life is shortened in 2-3 - Detachment of chips on the motherboard (repair will cost in the future) 50-70% Automatic shutdown of the phone (fire protection).

5. Update and Firmware Reflash: When It Helps

If the brakes appeared after the update MIUI Or the phone is unstable (spontaneous reboots, app crashes), the problem may be the firmware:

Verification and installation of updates

Xiaomi regularly releases patches to optimize Redmi 9A. To renew:

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

⚠️ Warning: If the phone brakes even more after the upgrade, reset the cache (see section 6.

5.2. Fastboot flashing (for experienced)

If the updates don't work, you can reflash the phone manually, which is a risky method, and if you make a mistake, the phone can turn into a brick.

  • The phone is not updated through the standard menu.
  • The system is damaged (for example, after a failed rooting).
  • You are confident in your actions and ready to take risks.

Step-by-step:

  1. Download the official firmware for Redmi 9A (dandelion codename from Xiaomi Firmware.
  2. Unpack the archive and place the image file in the root of the phone’s memory.
  3. Go to Settings → About Phone → System Update → Three Dots (menu) → Select a firmware file.
  4. Select the downloaded file and wait for the installation to be completed.

💡

Fastboot flashing erases all data! make a backup through Settings → Additionally. → Backup and reset.

Recoiling from the previous version MIUI

If the brakes started after the upgrade, you can return the old firmware.

  1. Find the archive with the right version MIUI forum 4PDA or Xiaomi Firmware.
  2. Download the recovery firmware (file with the extension.zip).
  3. Go to Settings → About Phone → System Update → Three Dots → Select a firmware file.
  4. Select the downloaded file and confirm the rollback.

After rollback, reset settings (Section 6) to avoid conflicts.

6.Settings reset: Last chance before the service

If none of these things work, you'll have a hard reset, which will delete all the data, but it will bring the phone back to the factory state. 9A After discharge works much faster due to cleaning of system debris.

Mild discharge (without loss of data)

Try to clean only the cache first:

  1. Turn off the phone.
  2. Press Volume Up + Power before the Mi logo appears.
  3. In the Recovery menu, select Wipe Cache Partition (manage volume buttons, confirmation – power button).
  4. Reboot your phone (Reboot System)

Full reset (hard reset)

If the soft reset does not help, perform a full cleanup:

  1. Make a backup copy of important data (photos, contacts, messages).
  2. Go to Settings → Additional → Backup and Reset → Reset settings.
  3. Choose to erase all data and confirm.
  4. After restarting, set your phone as new.

💡

After reset, don't restore the data from the backup right away! First check how the clean phone works. If the lags are gone, the problem was in the software, not the hardware.

What to do if the discharge does not help

Even after the complete reset of the Redmi 9A It is still slowing down, the problem is most likely in the hardware:

  • 🔋 Worn-out battery – if capacity falls below 70%, the phone can artificially limit performance.
  • 🛠️ Damaged motherboard - most often due to falls or moisture.
  • 💾 Faulty memory – if the internal drive “drops”, the system slows down when reading / writing.

In this case, you just have to carry the phone to the service — 500-1000 ₽, Replacement (for example, battery replacement) will be 1500-2500 ₽.

7. Alternative firmware: is it worth putting a caste

Some users are trying to speed up Redmi. 9A It's a custom firmware solution (like LineageOS or Pixel Experience:

  • ✅ Pros: Cleaner Android without “garbage" MIUI. Regular security updates. Ability to fine-tune performance.
  • ❌ Cons: Loss of warranty (if it is still valid), risk of "bricking" in case of installation error. Not all functions can work (for example, double-functioning). SIM or NFC, If you have it in your version).

If you do, follow this instruction:

  1. Unlock the bootloader through the official Xiaomi tool (you will need a Mi Account).
  2. Install. TWRP Recovery for dandelion (instructions are available on the 4PDA).
  3. Download the appropriate firmware (e.g. LineageOS 18.1 for Android 11).
  4. Install the firmware through TWRP, Then – GApps (Google services).

⚠️ Attention: Castom firmware for Redmi 9A often contain bugs with a camera or mobile network. Check the forum reviews before installing!

FAQ: Frequent questions about Redmi 9A brakes

My Redmi. 9A It only slows down in games?
Reduce the graphics in the game settings to Low or Balanced. Also open Settings. → Special facilities → Optimization MIUI → Turbo mode and turn it on. If the game still lags, try the Game Booster from the Play Market (but not all versions work on Redmi). 9A).
The phone stopped after the update. MIUI. How to roll back?
Download the desired firmware version from the official Xiaomi website, place the file in the root of memory and select it in Settings. → Updating the system → Three points. → Select a firmware file. After rollback, reset your settings.
Can I increase RAM on the Redmi 9A?
Physically, no, because RAM is soldered into the motherboard, but you can use the RAM extension function (available in the motherboard). MIUI 12.5+): Go to Settings. → Additionally. → Memory. → Expand RAM and select 1 GB 2 GB (to be borrowed from internal memory) This gives you an increase in performance on the computer. 10-15%.
What to do if the phone slows down and discharges quickly?
The problem is probably a worn-out battery, check it at the AccuBattery (Play Market), and if the capacity is below 70%, replace the battery (cost). ~1500 ₽). Also check if the phone is warming up - overheating speeds up the discharge.
Will replacing the memory chip with a faster one?
No, because the memory is at Redmi. 9A It is integrated into the processor (eMMC 5.1). It cannot be replaced separately - only together with the motherboard, which is economically impractical (the cost of repair is comparable to the price of a new phone).