Xiaomi Redmi 9 hangs: reasons and 10 working ways to eliminate

Why Redmi 9 is starting to slow down and what to do about it

Xiaomi Redmi 9 is one of the most popular budget smartphones, but even it is not immune to performance problems. If your device suddenly starts to hover on the logo, slow down when opening applications or not respond to touch, the reasons can lie in software failures and hardware malfunctions, in 80% of cases, the problem can be solved independently without going to the service center.

The main symptoms experienced by Redmi 9 users (including Redmi 9A, 9C, 9T modifications):

• 📱 The screen freezes on 10-30 seconds, then returns to normal.
• 🔄 The phone does not leave boot mode (infinite animation) MIUI)
• 🎮 Games and heavy apps crash with an error or stray badly
• 🔋 The device spontaneously restarts when connecting charging

In this article, we'll look at all the possible causes, from overcrowded memory to damaged firmware, and give you step-by-step instructions for how to fix them, start with the simplest methods, and gradually move on to radical measures.

1. Forced reset - the first step when getting stuck

If Redmi 9 doesn't respond to touch completely or the screen is frozen in one image, don't try to disassemble the phone right away. Hard reset is 60 percent effective.

Instructions for all Redmi 9 models:

1. Press the power button for 10-15 seconds.
2. If the screen is out, but the phone is not restarted, hold Power + Volume up for another 10 seconds.
3. After the vibration and the appearance of the Xiaomi logo, release the buttons.

⚠️ Warning: If the phone hangs on the logo again after the reboot MIUI More than 5 minutes is a sign of a damaged firmware or a malfunctioning internal memory, in which case you will need to flash or diagnose the service.

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If the phone is responsive to touch but is slow to work, try restarting it in Safe Mode: Hold the Power button, then press and hold "Stop" → "Safe Mode."

2.Cache cleanup and memory release

One of the most common causes of brakes is overcrowded storage or cache. Redmi 9 has only 32/64 GB of memory, and if it's less than 10% free, the system starts to slow down.

1. Go to Settings → About the phone → Storage.
2. If you have less than 5 GB of free, delete unnecessary files (photos, videos, unused applications).
3. Click "Clean" in the Cash section.

For deep cleaning, use the built-in Security app:

• 🧹 Open Security. → Cleanup.
• 🔍 Select “Deep Clean” and delete unnecessary files.
• 🗑️ In the "AutoStart" section, disable the background work of unnecessary applications.

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If the phone still brakes after cleaning the memory, the problem may be the fragmentation of the storage, in which case the reset to factory settings or flashing will help.

3. Update MIUI to the latest version

Hazes are often caused by firmware bugs. Xiaomi regularly releases updates to fix critical bugs. Check the relevance of your version of MIUI:

1. Go to Settings → About the phone → System update.
2. Click "Check Updates."
3. If a new version is available, download it and install it.

⚠️ Note: If the phone hangs during the update (at the stage "Installation..." more 20 - Do not turn it off or remove the battery. 1-2 If the process is not complete, you'll need to manually flash through the Fastboot.

If the update doesn’t help or doesn’t, try rolling back to the stable version:

4. reset to factory settings (Hard Reset)

If the previous methods didn't work, you'll have to reset completely, which will delete all the data, but return the phone to factory performance.

• 📱 Go to Settings. → The phone. → Backup.
• 🔄 Select “Reserve in Mi Cloud” or connect to your PC and copy files manually.
• 🔐 Remember or record your Mi Account details (required to unlock after resetting).

Resetting instructions:

Make a backup copy|Charge your phone at least 50 times%|Remember the Mi Account data|Make sure that SIM-map removed (optional)|Prepare the charger in case of a long procedure-->

1. Go to Settings → About the phone → Reset settings.
2. Select "Erase all data."
3. Enter a password (if required) and confirm the action.
4. Wait until it is completed (it will take 5-15 minutes).

If the phone doesn’t turn on or hangs on the logo, reset via Recovery mode:

1. Turn off your phone (forced if it doesn’t respond).
2. Press Power + Volume up until the Mi logo appears.
3. In the Recovery menu, select Wipe Data → Wipe All Data (manage volume buttons, confirmation – power button).
4. After reset, select Reboot.

5. Virus and malware check

Hazes can be caused by viruses or miners loading the processor in the background. Even if you didn't install suspicious applications, malicious code could get in through:

• 📎 Investments in SMS/messenger
• 🌐 Informal APK-Files (including modified games)
• 🔗 Phishing sites

How to check your phone:

1. Install an antivirus (such as Malwarebytes or Dr.Web Light).
2. Run a deep scan.
3. Remove any threats you find.
4. Check the list of installed applications in Settings → Applications for suspicious programs (for example, with names such as "System Update", "Flash Player" or Cyrillic characters).

⚠️ Note: If the antivirus detects root malware (such as Triada or Ztorg), a routine cleanup will not help. In this case, be sure to reset to factory settings and do not restore data from the backup - the virus could have been saved in the backup.

6. Diagnostics of hardware problems

If the software methods did not help, the cause of the freeze may lie in a malfunction of the iron.

• 🔋 Worn-out battery (causes sudden shutdowns and reboots)
• 💾 Damaged memory chip (leads to app crashes and freezes)
• 🔌 Oxidized contacts (for example, after moisture is ingested)
• 🌡️ Processor overheating (due to clogged ventilation or faulty thermal interface)

A critical sign of hardware failure: the phone hangs when connected to charging or when heating (for example, during games), in this case, self-repair is impossible - diagnostics are required in the service center.

How to check the basic performance of iron:

1. Connect your phone to your PC and run the Mi PC Suite (the official software from Xiaomi), and if the program doesn’t recognize the device, it could indicate problems with the USB controller or motherboard.
2. Run the battery test through the engineering menu: ##4636## In Battery Information, check Health Level. If it is below 70%, the battery needs to be replaced.
3. Install the Throttling Test CPU app from Google Play and check if the CPU frequency decreases when you load (this is a sign of overheating).

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If the phone only hangs when connected to charging, 90% of the problem is with a faulty power controller or a damaged cable. Try using Xiaomi's original (18W) RAM.

7. Flashing through Fastboot (for power users)

If Redmi 9 doesn't turn on, is fixated on the logo, or doesn't react to a reset, the last option is Fastboot flashing, which requires a PC and minimal technical skills.

Step-by-step:

1. Download the official firmware for your model from the Xiaomi website (choose the Fastboot version).
2. Unpack the archive in a folder on your PC.
3. Install the Mi Flash Tool and ADB drivers.
4. Turn off the phone and put it in Fastboot mode: pinch Power + Volume down.
5. Connect your phone to your PC and start the Mi Flash Tool.
6. Select the firmware folder and press Flash.

⚠️ Attention: Continuous power during firmware is critical, and if the process is interrupted, the phone can turn into a brick. Use the original cable and charger connected to the PC via a PC. USB-powerhouse.

8.When to contact the service center

If none of the methods worked, and the phone still:

• 🔄 Cyclically rebooted (onset) → switch off → switch on)
• 🔥 Overheated without load (temperature above 50)°C to the plain)
• 💥 Does not respond to charging (even with the original RAM)
• 📵 Not defined by PC in any mode (Fastboot, Recovery)

These are signs of a serious hardware malfunction, in which case self-repairing can make the problem worse.

Average cost of repair Redmi 9 in service centers (2026):

Before the service visit:

• 📋 Write it down. IMEI phone (on a box or under a battery).
• 🔐 Make sure you remember your Mi Account details (required to unlock after repair).
• 📱 Take a photo of your phone from all sides (to fix external damage).

FAQ: Frequent questions about Redmi 9 hangouts