What to do if the Xiaomi Redmi 9 freezes: from forced reboot to flashing

Xiaomi Redmi 9 is one of the most popular budget smartphones, but even it is not immune to sudden freezes. The screen does not respond to touch, buttons do not work, and the device turns into a brick? Don't panic: in 90% of cases, the problem can be solved independently without the help of a service center. In this article, we will analyze all possible causes — from banal overheating to firmware failure — and give step-by-step instructions taking into account the features of this model.

It’s important to understand that Redmi 9 (codenamed lancelot) has unique “diseases”: for example, frequent freezes due to overflowing of the MIUI cache or conflicts with microSD cards. We will not offer universal tips like “reset the phone” – instead, focus on specific solutions that work for this line, and you will learn how to avoid data loss and when to carry the device for repair.

If your Redmi 9 is stuck on the MI logo, doesn't turn on after an update, or just hangs up while you're working, read on. We've arranged the methods from the simplest to the most radical so you can start with the minimum risk to data.

1. Forced reset: first step when getting stuck

If the Redmi 9 screen doesn’t respond to touch, but the display is on (or flashing backlights), try hardware reboot, which works even when the interface is completely frozen, as it does not depend on the operating system’s state.

For the Redmi 9 (and most Xiaomi smartphones), the key combination is as follows:

• 🔄 Press the power button. + Volume button for 10-15 seconds (before vibration or logo appearance) MI).
• 📱 If the screen is gone but the phone is not restarting, release the buttons and try again in 30 seconds.
• ⚡ If the problem recurs after the reboot, proceed to the next method (this is a sign of a more serious failure).

⚠️ Warning: Don't confuse hardware reboot with Fastboot Mode! If a bunny in a fastboot appears on the screen, you've been holding the buttons for too long. In this case, just select Reboot using the volume buttons and confirm with the power button.

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If the phone is getting stuck while playing or shooting a video, let it cool for 5-10 minutes before rebooting. Overheating the Helio G80 processor in Redmi 9 often causes temporary freezes.

2.Charging and battery check: why Redmi 9 'hangs' at 0%

One of the most common causes of Redmi 9 freezes is a faulty battery or power supply, a smartphone that can hang on a logo, turn off suddenly or not respond to charging, and is especially true for devices older than 2 years, where battery capacity drops below 70%.

How to diagnose:

• 🔋 Connect the original charging unit (power) 18W or 22.5W) And check if it's charging, and if the light doesn't go on, the problem is in the port or the cable.
• 🔄 Try charging your phone from another unit (like the Redmi Note 10). If you start charging, your adapter fails.
• 📊 Install the AccuBattery app (if the phone is sometimes turned on) and check the battery health.A value below 60% is a reason to replace it.

⚠️ Warning: If the battery is swelling (seen by the raised screen or the warping of the back cover), you can't try to charge the phone! This can cause fire.

3. Cache reset via Recovery Mode: if MIUI «If Redmi 9 is stuck on the logo MI, It's constantly restarting or hanging when you start up, and it's the fault of the damaged cache, which is a common problem after updates. MIUI Or installing incompatible applications, the solution is to clear the cache through Recovery Mode. Instructions for Redmi 9: Turn off the phone (if it doesn't respond, force reboot, as in the first section). + Volume up button before logo appears MI, Then let go. From the Recovery menu, select the language and go to Wipe & Reset. Select Wipe Cache (NOT Wipe Data!) and confirm the action. After cleaning, go back to the main menu and select Reboot. 📌 What to do if Recovery does not open? 🔧 Maybe the firmware is damaged. Try to log in to Fastboot Mode (Power button) + Reduce volume and stream your phone through the Mi Flash Tool. 🔄 If the Recovery menu is in Chinese, look for icon items: = Wipe, = What is Wipe Cache and why does it help? MIUI — These are temporary files that the system uses to speed up work. If a failure (for example, after an update) these files can conflict with the new version of the software, causing freezes. Clearing the cache deletes them, but does not affect user data (photos, messages, etc.).

4. Remove problematic applications through Safe Mode

If Redmi 9 is turned on, but freezes a few minutes after launch, one of the installed applications is to blame.

• 🎮 High Demand Games (Genshin Impact, PUBG), processor-overload.
• 🔍 Antiviruses or cleaners (e.g. Clean Master) that conflict with MIUI.
• 📱 Applications for Automatic Clicking, Modifying Themes, or Blocking Ads.

To find the culprit, download the phone to Safe Mode, where only system applications work:

1. Turn off Redmi 9.
2. Press the power button and as soon as the MI logo appears, immediately press the volume down button.
3. Hold it until the system is fully loaded, and in the lower left corner, you'll see the Safe Mode message.

In this mode:

• 🔍 Check if the phone is hanging. If it's not, there's a problem with the third-party app.
• 🗑️ Remove recently installed programs through Settings → Annexes.
• 🔄 Restart your phone in normal mode.

⚠️ Warning: Safe Mode has disabled all user apps, including Google Play. If your phone is stable, delete programs one at a time, starting with the most suspicious ones until you find the culprit.

Download to Safe Mode

Check the stability of the work

Remove the last 3-5 installed applications

Reboot normally

Monitoring the behavior of the phone 1-2 days-->

5.Reset to factory settings: Last chance before firmware

If previous methods didn't work, and the phone still hangs on the logo or works with constant lags, you'll have to do a Hard Reset, which will delete all the data, but return the smartphone to a "clean" state. Importantly, if the phone sometimes turns on, first back up through Settings → About Phone → Backup.

How to Reset Redmi 9 with Recovery

1. Turn off the phone.
2. Press the power button + volume button to enter Recovery.
3. Select Wipe Data → Wipe All Data (on some versions of Factory Reset).
4. Confirm the action (it may be necessary to enter a password if it was set).
5. After reset, select Reboot.

🔹 What to do if the reset does not help?

• 📱 Maybe the firmware is damaged. Try to flash your phone through the Mi Flash Tool (instructions in the next section).
• 🔧 If the reset has passed, but the phone still freezes - the problem is in the hardware (memory, processor, motherboard).

⚠️ Note: Redmi 9 will require you to enter your Mi Account if Find Device was previously enabled after resetting, if you don't remember the password, restore it in advance on account.xiaomi.com, otherwise the phone will remain locked!

6. Fastboot flashing: When nothing helps

If Redmi 9 doesn't turn on even after a reset or freezes on a Fastboot Mode, the only option is to reflash the phone manually, which requires a computer and special tools, but brings the phone back to life even after serious crashes.

🔧 What's the matter:

• 💻 Windows computer (7/10/11).
• 🔌 Original. USB-cable (better from the set).
• 📥 Firmware for Redmi 9 (codenamed Lancelot) from en.miui.com.
• 🛠️ The Mi Flash Tool (you can download it here).

📌 Step-by-step instruction:

1. Download and install the Mi Flash Tool.
2. Unpack the firmware (file with.tgz extension) in a folder without Cyrillic characters.
3. Turn off Redmi 9 and press the Power + Volume Down button to enter the Fastboot.
4. Connect your phone to your PC. Android Bootloader Interface should appear in the Device Manager.
5. In the Mi Flash Tool, click Select and specify the path to the firmware folder.
6. Select Clean All mode and press Flash.
7. Wait for the process to finish (5-10 minutes) and the phone will reboot automatically.

⚠️ Note: If an anti-rollback error appears during firmware, you are trying to install an older version. MIUI, In this case, download the newer firmware and repeat the process.

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Fastboot flashing is the surest way to bring Redmi 9 back to life, but it erases all data. Use it only if other methods have failed.

7. When to contact the service: signs of hardware malfunctions

If none of these methods worked, the problem is likely hardware, and here are the signs that you should bring the Redmi 9 to the service center:

• 🔥 The phone is very hot even when turned off (possibly a short circuit on the motherboard).
• 💥 Vertical stripes or artifacts appeared on the screen (a plume or matrix is damaged).
• 🔋 The battery is swollen or the phone turns off when the charge level is above 20%.
• 📱 The device is not detected by the computer in Fastboot (damaged) USB-port).
• 🔊 The phone emits a squeak or crackle from the speaker (problems with the audio chip).

💰 Cost of repairing Redmi 9 in 2026 (approximate):

⚠️ Attention: If Redmi 9 on warranty 2 years from the date of purchase, do not disassemble it yourself! Contact the authorized service center Xiaomi - repair will be free. mi.com/ru/service.

FAQ: Frequent questions about Redmi 9 hangouts