Why Xiaomi Redmi 9A All causes and working methods of acceleration

Xiaomi Redmi 9A — One of the most popular budget smartphones, but even it isn't immune to performance issues. If your device starts to "hang," slowly open apps, or respond to late touches, it doesn't always mean it's time to buy a new phone. In 80% of cases, lagas are caused by software factors that can be eliminated independently without contacting a service center.

In this article, we will discuss all possible causes of brakes on Redmi. 9A — From overloaded memory to hardware malfunctions, you'll learn how to diagnose a problem, which settings to optimize first, and when to really think about repairing. MIUI, which many users do not use, but which can radically improve the smoothness of work.

If the phone starts to lag immediately after you buy it, it can be a marriage or unoptimized firmware, otherwise follow our recommendations in order, starting with the simplest solutions.

1. Overloading of RAM (RAM)

Redmi 9A Equipped with only 2-3 GB of RAM (depending on the modification), and this is one of the main reasons for the brakes. MIUI aggressively manages memory, but even that is not enough if many applications are running simultaneously.The system starts loading data from a slow internal memory (eMMC 5.1), which causes delays.

How to check the loading of RAM:

1. Open Settings → About the phone → System status.
2. Check out the graph Memory Use.
3. If it is less than 300-500 MB, the memory is overloaded.

• 🔄 Close background apps: Use the “Clear” button in the recent task menu (swipe up with a delay on the home screen).
• ⚙️ Turn off autoboot: Settings → Annexes → Auto-Start and Deactivate Unnecessary Programs.
• 📱 Use the Easy Version mode for resource-intensive applications (available in Settings) → Special facilities → Lite mode).
• 🚫 Remove widgets from the main screen – they are constantly consuming RAM.

⚠️ Note: Do not use the memory boosters from Google Play. They not only do not help, but also consume resources themselves, exacerbating the problem. MIUI already has a built-in optimizer - just turn on Settings → Battery and productivity → Optimization.

2.Pulled storage: why it slows down the phone

Redmi 9A It comes with 32GB or 64GB of internal storage (real available) ~22 GB and ~50 GB, respectively. When less than 10% of the available space is left, the system starts to run slower for two reasons:

1. Data fragmentation: files are broken down into smaller pieces and take longer to read.
2. Lack of cache space: Apps have nowhere to save temporary files, causing hang-ups.

How to make the right place:

• 📸 Move your photo/video to the cloud (Google Photos, Mi Cloud) or to a memory card (if supported).
• 🎮 Remove the game cache: Settings → Annexes → [Game] → Warehouse → Clear the cache.
• 🗑️ Use the built-in cleaning: Settings → Warehouse → Cleaning (removes unnecessary ones) APK, duplicates, temporary files).
• 📥 Turn off automatic download in messengers (WhatsApp, Telegram).

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If your phone says "Not enough memory," but there's enough space, check the Download folder, which often accumulates gigabytes of unnecessary files from your browser and messengers.

3.Outdated firmware or MIUI errors

Xiaomi regularly releases updates for Redmi 9A, But many users ignore them. MIUI contain:

• Corrections of bugs that cause lags.
• Optimization for low-performance chipsets (like MediaTek Helio) G25 in this model).
• Security patches that prevent background activity of malicious applications.

How to update firmware:

1. Go to Settings → About the phone → System update.
2. Click Check for updates.
3. If you have a new version, download it (preferably via Wi-Fi).
4. Before installation, make a backup copy (Settings) → Additionally. → Backup).

⚠️ Note: If the phone is even more likely to be a bug after the update, it may be a bug of a particular version.

Critical information: On Redmi 9A firmware MIUI 12.5 There is a bug with "drawdowns" FPS» when you scroll through the menu. MIUI 13+ Solves the problem by optimizing animations.

4. Application background activity and viruses

Many apps (especially from third-party sources) continue to work in the background even when you’re not using them.

• 📊 Social media (Facebook, Instagram) – known for aggressive resource consumption).
• 🎮 Games with online services (for example, PUBG Mobile or Free Fire).
• 🔍 Advertising apps (can load banners even when folded up).
• 🦠 Malware (masked as system utilities).

How to Detect and Disable “Voracious” Applications:

1. Open Settings → Battery and Performance → Battery Use
2. Look at what apps are consuming. >5% charge in the background.
3. For suspicious programs: Turn off AutoRun. Disable background (Settings) → Annexes → [Annex] → Battery → Background activity. Remove if not used.

Download Malwarebytes from Google Play|Run a full scan.|Remove detected threats|Check the permissions of suspicious applications-->

If you suspect a virus:

• Install Malwarebytes or Dr.Web Light.
• Scan the system (pay special attention to folders) /system/app and /data/app).
• If the antivirus finds Android/Trojan Adware – remove without thinking.

5. Memory card problems (if used)

Many Redmi users 9A They expand memory using microSD, but cheap or damaged cards can slow down the phone by 2-3 times:

• Low speed reading/write (class) 4/6 Class instead 10/UHS-I).
• File fragmentation on the map.
• File system errors (for example, after extraction without safely disabling)

How to check the memory card:

1. Remove the card and test the phone without it. If the lags are gone, the problem is in the map.
2. Connect the card to your PC and run error check: chkdsk [disk letter]: /f /r
3. If the read speed is below 10 MB/s (checked in CrystalDiskMark) – replace the card.

⚠️ Warning: Never use a memory card as an internal storage (the option is to format as an internal memory in the memory system). MIUI). This leads to: slowing down all applications (even system ones); rapid card wear (due to constant I/O operations); inability to retrieve the card without resetting the phone.

6. Hardware problems: when it's time to go to the service

If all software methods have been tried, but Redmi 9A It's still slowing down, it could be iron:

• 🔋 Worn-out battery (at a discharge below 20%, the processor automatically reduces performance).
• 🔥 Chipset overheating (causes trottling – forced frequency reduction) CPU).
• 💾 Damaged internal memory (eMMC) (leads to read/write errors).
• 📱 Display or battery plume (may cause accidental hangings).

How to diagnose hardware malfunctions:

• Check the temperature: set it. CPU Monitor and see if the temperature is above 60°C under load.
• Test the battery: enter the code ##4636 in the engineering menu## → Battery information. If the wear level > 30%, replace the battery.
• Check the memory for broken sectors: adb shell df -h e2fsck /dev/block/mmcblk0pX (rooting).

If a hardware problem is detected:

• 🔧 Replacing the battery will cost 1,000-1,500 ₽ (original 5,000mAh).
• 🔥 Overheating is often solved by replacing the heat paste on the chipset (MediaTek Helio) G25 It is warmer than Snapdragon).
• 💾 A damaged eMMC is a sentence, and it costs 3,000 to 5,000 to repair. ₽, What is the price of a new phone.

7. Incorrect settings MIUI, phone-stop

MIUI It offers a lot of features that steal resources from the background. By turning them off, Redmi can speed up the work. 9A:

• 🎨 Animations and transitions: Activate Settings → The phone. → Version. MIUI (Press 7 times to turn on Developer Mode. Return to Settings → Additionally. → For developers. Set: The scale of the window animation → Off. Scale of transition animation → Duration of the animator → Off.
• 📡 Background data transfer: Limit background traffic for applications in Settings → SIM-maps and mobile networks → Transfer of data → Background transmission. Turn off Auto-Update apps in Google Play.
• 🔍 Google Search: Turn off Settings → Google → Search → Background Activity: Remove the Google Discover widget from the home screen.

We also recommend:

• 🌙 Include a dark theme (Settings) → Screen. → Dark subject – reduces the load on GPU.
• 🔄 Turn off automatic wallpaper change (Settings) → Wallpaper. → The driver).
• 📵 Install static wallpaper instead of living.

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Disabling animations in developer mode gives an increase in smoothness by 15-20% due to reducing the load on the processor.

8.Reset to factory settings: Last chance

If none of these methods work, you'll have a hard reset, which will delete all the data, but it will bring back factory performance. 9A Often slows down due to accumulated errors in system files, and reset solves this problem in 90% of cases.

How to do the reset correctly:

1. Create a backup: Contacts: export to VCF via Contact → Settings → Import/Export. Photo/video: copy to PC or cloud. Applications: write down the list of installed programs (Settings) → Annexes → All applications).

Settings → About phone → Reset settings → Delete all data

Clear it all up.

Do not restore data from backup

⚠️ Note: If the phone still brakes after reset, it is a 100% hardware problem (see section 6.

An alternative method is firmware via Fastboot (for experienced users):

• Download the official firmware from the Xiaomi website.
• Install the Mi Flash Tool on your PC.
• Connect your phone in Fastboot mode (clip Power + Volume down when you turn off).
• Make sure you clean your phone (clean all).

FAQ: Frequent questions about lags on Redmi 9A