Xiaomi Redmi 9A is slowing down and glitching – what to do in 2026?

Xiaomi Redmi 9A is one of the most popular budget smartphones, but over time, even it begins to “brake”, hang or suddenly reboot. If your device is slower, do not rush to blame the manufacturer: in 90% of cases, the problem can be solved without repair. In this article, we will analyze all possible causes — from overloaded memory to firmware failures — and give step-by-step instructions for restoring speed.

The Redmi 9A features modest specs: MediaTek Helio G25 processor, 2-3 GB of RAM and eMMS memory instead of fast UFS. This means that even a small load (background apps, cache, viruses) can lead to freezes. But not all that bad: the right setup and prevention will return the smartphone to its former briskness. Let’s start with simple solutions and get to radical measures — if nothing helps, you will know when it’s time to carry the phone to service.

1.Diagnostics: Why did the Redmi 9A start to brake?

Before treatment, you need to make a diagnosis, brakes can be caused by:

• 📱 Overloaded memory – less than 10% of free storage space.
• 🔄 Failures in the firmware - after the update MIUI or.
• 🦠 Viruses or malware, especially if installed APK unverified.
• 🔋 Worn-out battery – when the discharge is below 20%, the processor automatically reduces performance.
• 🔥 Overheating – if the body is hot, the chipset trottlit (resets frequencies).

To understand what is wrong, check:

1. Go to Settings → About Phone → Battery status and look at the discharge schedule. If the phone runs out in 3-4 hours without active use, the problem is in the battery or background software.
2. Open Settings → Memory and check how much space is occupied. If less than 5 GB is free, clean.
3. Install the CPU Monitor app (from Google Play) and look at the CPU load, and if it's consistently above 70%, there's a heavy app hanging in the system.

Critical point: if the brakes appeared after a fall or moisture, the problem may be hardware (detached plume, oxidation of contacts), in this case, self-repair is fraught with aggravation of the breakdown.

2. Cleaning up memory and cache: the first step to speeding up

The most common cause of brakes is clogged memory. Redmi 9A uses slow eMMS memory, which, when filled, starts to work at times slower.

Step 1: Delete unnecessary files

• 📸 Photos and videos: transfer them to your computer or to the cloud (Google Photos, Mi Cloud). → Categories → Images/Video.
• 🎵 Music and downloads: check the Download folder – unnecessary ones often accumulate there APK documents.
• 🗑️ Basket: In MIUI The deleted files go into the bin and take up space for another 30 days. → Basket.

Step 2. Clear the app cache

Cache speeds up the software, but it grows over time to gigabytes to clean it up.

1. Go to Settings → Applications → Application Management.
2. Choose an app (start with Facebook, Instagram, YouTube – they’re the litteriest).
3. Click Clear Cache (not data!).

Step 3: Use the built-in MIUI cleaner

Redmi 9A has an optimization tool:

1. Open Security. → Optimization.
2. Click Deep Clean – this will remove temporary files and residual debris.
3. Enable Auto Cleanup (in the same menu) so that the system deletes unnecessary files once a week.

⚠️ Warning: Do not clear application data (Clean data) unless you want to lose logins, settings and progress in games!

3. MIUI Optimization: Disabling Unnecessary Functions

MIUI is known for its bloated functionality, which eats up resources. Turning off the extra features can give you up to 30 percent performance gains.

1. Turn off animations and visuals

MIUI likes smooth transitions, but on the weak Redmi 9A, they only slow down the interface.

1. Activate Developer Mode: Settings → About Phone → MIUI version (click 7 times).
2. Back to Settings → Additionally. → For developers.
3. Find the items: Window animation scale → Disable; Transition animation scale → Disable; Animation duration → No animation.

2. Limit background activity

Many apps continue to work in the background even when you're not using them.

• 🔄 Go to Settings. → Battery and productivity → Battery management.
• 📵 Select Background Limitation and add messengers, social networks and other “gluttonous” applications there.
• ⚡ Turn on battery saving (even if you don’t need savings – it will limit background processes).

3. disable unnecessary system applications

MIUI comes with a bunch of pre-installed software that can’t be removed but can be deactivated:

1. Go to Settings → Applications → Application Management.
2. Click on the three dots in the upper right corner and select Show all processes.
3. Find and disable: Mi Video, Mi Music (if you do not use); Cleaner (built-in cleaner, which brakes itself); Mi Pay, Mi Credit (financial services, unnecessary in Russia).

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If errors appear after disabling system applications (for example, the camera does not open), return them to the original state in the same menu.

4. Resetting settings: a radical solution

If the cleanup and optimization didn't work, the next step is to reset to factory settings, which will delete all the data, but return the smartphone to "virgin" speed.

How to make a backup:

1. Connect your phone to Wi-Fi.
2. Go to Settings → Accounts and Sync → Mi Cloud.
3. Enable backup for Contacts, Messages, Notes and Settings.
4. For photos and videos, use Google Photos or copy them to your computer.

How to reset your settings:

1. Open Settings → About the phone → Reset settings.
2. Choose to erase all data.
3. Confirm the action (you will need to enter a pattern lock or PIN).
4. Wait for the reboot (it will take 5-10 minutes).

⚠️ Warning: If the brakes are left after reset, the problem may be in the hardware (memory, processor, motherboard), in this case, only diagnostics in the service center will help.

5. firmware update: fixing MIUI bugs

Xiaomi regularly releases updates that optimize the Redmi 9A. If your firmware is outdated, this may be the reason for the brakes.

1. Go to Settings. → Updating the system.
2. Click Check for updates.
3. If a new version is available, download it and install it.

What to do if the update is not installed:

• 🔌 Connect your phone to charge (the battery must be at least 50 times charged%).
• 📶 Use a stable Wi-Fi connection (not mobile internet).
• 🗃️ Free up at least 3GB of memory before upgrading.

If the update is “hang” during the installation phase:

1. Wait 30 to 40 minutes (sometimes the process is slow).
2. If nothing happens, force the phone to restart (press Power + Volume up for 10 seconds).
3. Repeat the attempt or install the firmware manually via Fastboot (instruction below).

6.Battery problems: how they affect performance

If the Redmi 9A battery is worn out (capacity has dropped below 70%), the phone begins to trottle - artificially reduce performance to save charge.

1. Install the AccuBattery app from Google Play.
2. Charge your phone to 100% and discharge to 0% (no recharging!).
3. If the capacity is below 2000 mAh (originally 5000 mAh), it is time to change the battery.

How to extend the life of the battery:

• 🔌 Do not keep your phone charging after 100% (turn off at 80-90%).
• 🌡️ Avoid overheating (do not play games while charging).
• 🔄 Calibrate once every 3 months: discharge to 0% → charge up to 100% without interruption.

If the battery is swollen or the phone turns off with 30-40% charge, immediately replace the battery.

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Replacing the battery in the Redmi 9A costs 1,500-2,500 rubles (2026) and do it only in certified service centers – cheap analogues can be dangerous!

7 Hardware problems: when without service can not do

If none of these things worked, the problem could be the hardware.

• 🔥 The phone warms up strongly even without load (possibly the thermal paste has detached or the processor is damaged).
• 💾 Applications fail to open or give an error “Insufficient memory” (eMMMS memory damaged).
• 🔌 The phone does not turn on or cyclically restarts (bootloader or motherboard failure).
• 📶 It's not working well. Wi-Fi/Bluetooth (communications module damaged).

What to do:

1. Please contact the official Xiaomi service (list on the mi.com website).
2. If the phone is guaranteed, do not open it yourself!
3. If the warranty is over, find a proven service with good reviews (check on Yandex.Maps or 2GIS).

Cost of repair (2026, Moscow):

⚠️ Warning: If you are offered to “swipe your phone for 500 rubles” in a suspicious service, there is a high risk of getting a “brick”; official firmware is free, and paid “optimizations” are often a scam.

FAQ: Frequent questions about Redmi 9A brakes