Resetting Xiaomi Redmi Note 9 to factory settings - a radical but effective way restore your smartphone to its former performance, fix software glitches, or prepare the device for sale. However, not all users know that an incorrect reset can lead to the loss of important data. phone, mode Improper reset may result in loss of important data or even block the device if you do not take into account the nuances of working with MIUI and account Xiaomi.

In this article you will find three proven reset methods — through the phone settings, mode Recovery and Fastboot, as well as unique recommendations for saving data and unlocking after a reset, relevant specifically for Redmi Note 9. We'll look at why sometimes a reset doesn't help, how to get around the "This device is locked" error, and what to do if the phone doesn't turn on after the procedure.

Preparing for a reset: what needs to be done before start

Before you start resetting, be sure to follow these steps they will save you hours of data recovery and troubleshooting possible problems:

  • 📱 Create a backup copy. Use the built-in application Backup (Settings → About phone → Backup) or third-party services like Google Drive. Pay special attention to:
    • Contacts (export to .vcf)
    • Photos and videos (copy to PC or cloud)
    • Messages (use SMS Backup & Restore)
  • 🔋 Charge the phone to at least until 50%. data-i="64">if you plan to sell the phone.. Interrupting the reset process due to low battery can lead to briku (inoperability) of the device.
  • 🔑 Make sure you remember your account information Mi. After resetting, the phone will require you to enter your login and password to unlock (Mi Account Lock).
  • 📶 Disable all accounts (Settings → Accounts), especially Google And Miif you plan to sell your phone.

If you reset your phone because freezes or slow operation, try less drastic measures first:

Clear the cache in Settings → Storage → Clear cache|

Delete unused applications|

Disable startup applications in Settings → Battery → Autostart|

Update MIUI to the latest version - -->

Redmi Note 9 has a feature: after resetting through Recovery you may need to re-install activation Mi Account, even if you unlinked the account in advance. This is due to the security policy. Xiaomi.

Method 1: Reset through phone settings (the most secure)

This method is suitable if the phone turns on and responds to touchesIt is as simple as possible and minimizes the risk of errors.

  1. Open Settings (gear icon on the main screen).

  2. Go to section About phone → Backup and reset.

  3. Select Reset settings → Erase all data.

  4. Enter PIN code or patternif the system prompts.

  5. Confirm the action by pressing Erase everything. The phone will reboot and begin the reset process (takes 5-10 minutes).

After the reboot you will see the initial screen settings as after purchase. It is important here:

  • 🔓 Do not connect to Wi-Fi right away - first check if the phone is locked Mi Account Lock.
  • 📱 If the phone requires you to enter account data Xiaomi, use the same login and password that you had before the reset.
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If after After resetting, the phone does not see the SIM card, reboot it again or check the network settings in Settings → SIM cards and mobile networks.

⚠️ Attention: On some firmware MIUI the reset option may be in Settings → Advanced → Recovery and reset. update the firmware or use the method via Recovery.

Method 2: Reset via Recovery Mode (if the phone does not turn on)

If Redmi Note 9 stuck on the logodoes not respond to touches or is locked by a password that you have forgotten, resetting through recovery mode will help. This method works even with damaged firmware, but requires caution.

  1. Turn off the phone (press and hold the power button). 10–15 seconds).

  2. Press simultaneously Power button + Volume up and hold for 5-7 seconds until the logo appears Mi.

  3. Release the buttons - you will be taken to menu Recovery (navigation by volume buttons, selection by power button).

  4. Select item Wipe Data → Wipe All Data → confirm the action (Confirm).

  5. After completion, select Reboot → Reboot to System.

If in the menu Recovery there is no item Wipe Data, which means you have custom firmwareinstalled. In this case:

  • 🔧 Select Advanced → Wipe Dalvik/ART Cache, then repeat try.
  • 📛 If the menu is in Chinese, look for the characters (data clearing).
Problem Cause Solution
The phone does not turn on Recovery The button is faulty Volume up Use ADB or Fastboot (method 3)
After resetting, the phone requires the old password FRP Lock (Google protection) Enter the details of the last connected account Google
Menu Recovery in Chinese Firmware for the Chinese market Use a translator or focus on the location of the items
What to do if Recovery does not open?

If the phone does not respond to the button combination, try:

1. Connect the charger and try again (sometimes it helps). low battery).

2. Use the combination Power + Volume down (on some versions MIUI).

3. Install drivers Xiaomi on the PC and use Mi Flash Tool to force login Fastboot.

Method 3: Reset via Fastboot (for advanced users)

This method requires computer with installed drivers Xiaomi and is suitable in cases where:

  • 🔄 The phone is stuck in a reboot cycle (bootloop).
  • 🔐 The password is forgotten, and Recovery is locked.
  • 📱 You need to reflash the device after a failed updates.

Instructions:

  1. Install on PC Mi Flash Tool and drivers Xiaomi.

  2. Turn off the phone and put it into mode Fastboot: hold down Power + Volume down for 5-10 seconds. A hare in a hat with earflaps will appear on the screen.

  3. Connect the phone to the PC via USB.

  4. Open the command line (Win + R → enter cmd) and execute the commands in order: 

    fastboot devices

    (your serial number should be displayed Redmi Note 9)

    fastboot erase userdata
    fastboot erase cache
    fastboot reboot

If after the command fastboot devices the phone is not detected:

  • 🔌 Check the cable and port USB (it is better to use the original cable Xiaomi).
  • 🖥️ Reinstall the drivers via Mi Flash Tool.
  • 🔄 Try another USB port (preferably USB 2.0).
⚠️ Attention: Commands fastboot erase completely erase the data section If you plan to sell the phone, after resetting via Fastboot It is recommended to additionally flash a clean firmware via Mi Flash Toolto remove all traces of the previous owner.

Through the phone settings|

Via Recovery Mode|

Via Fastboot/PC|

Never reset|

Frequent errors after a reset and how to fix them

Even after a successful reset Redmi Note 9 may behave incorrectly. Here top 5 problems and their solutions:

  1. The phone requires an account Mi after reset (Mi Account Lock).

    This is standard protection Xiaomi. Enter the details of the account that was linked before the reset. If you forgot your password, restore it on the website account.xiaomi.com. The only official way to bypass it is to provide the purchase receipt to the service center Xiaomi.

  2. FRP Lock (Google protection).

    If the phone asks for account data Googlethat was synchronized before the reset, enter them. If your account is deleted, restore it via Google Account Recovery. Bypass FRP to MIUI is only possible through firmware with disabled verification (illegal).

  3. The phone does not see the SIM card.

    Reboot the device or check the network settings: Settings → SIM cards and mobile networks → SIM card settings. If the problem persists, reset the network settings (Settings → System → Reset settings → Reset network settings).

  4. Fast battery drain after reset.

    This is normal in the first 2-3 days: the system indexes files and optimizes operation. If the problem persists, calibrate the battery (discharge to 0%, then charge to 100% without interruption).

  5. Applications update spontaneously.

    Disable auto-update in Google Play: Settings → Automatic application updates → Never.

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If after resetting the phone begins to work slower than before the procedure, most likely the problem is damaged firmware or faulty drive. In this case, only flashing via Mi Flash Tool or replacing the memory module in the service.

How to restore data after a reset

If you did not make a backup copy, the chances of getting the data back depend from reset method:

  • 📱 Reset through settings: data is deleted programmatically, it can be restored using DiskDigger, EaseUS MobiSaver or Dr.Fone (provided that no new files were written to the phone).
  • 🔧 Reset via Recovery/Fastboot: data deleted at a low level, recovery is unlikely (especially for photos and videos).

To restore:

  1. Install the app on the PC EaseUS MobiSaver for Android.

  2. Connect the phone in mode MTP (file transfer).

  3. Select file types to scan (photos, messages, contacts).

  4. Wait until the analysis is completed and save the found files on your PC.

Important: do not write new data to your phone before recovery - this reduces the chances of success. If you urgently need to save something to the device, use SD card.

⚠️ Attention: Free versions of recovery apps often show “found” files, but do not allow you to save them. Before purchasing a license, check whether the app recognizes your phone model (Redmi Note 9 supported by most tools).

When the reset does not help: alternative solutions

If after the reset the problems remain (the phone slows down, overheats, does not turn on), the reason may be:

Symptom Possible cause Solution
The phone turns on but immediately turns off Faulty battery or power controller Replace the battery in the service
Constant reboots (bootloop) Damaged partition boot or system Reflash the phone via Mi Flash Tool
The phone gets hot and discharges quickly Wear of the battery or charging controller Check the health of the battery in AccuBattery
Sensors (gyroscope, proximity) do not work Damage after a fall or moisture Diagnostics in the service center center

If you suspect hardware malfunction, perform diagnostics:

  1. Check the battery status in the application AccuBattery (health below 80% - critical).

  2. Test the sensors using Phone Doctor Plus or CPU-Z.

  3. If the phone does not turn on at all, connect it to the charger for 30 minutes, then try holding Power + Volume up for 20 seconds (sometimes it helps with deep discharge).

How to check if there is a hardware problem?

If after a complete reset and firmware the problems remain, then the problem is in the hardware. Typical hardware faults Redmi Note 9:

- Memory chip failure (appears as a cyclic problem). reboot).

- Malfunction of the charging controller (the phone does not take a charge or heats up when charging).

- Damage to the screen cable (artifacts on the display or a non-functioning touchscreen).

In these cases, service repairs are required.

FAQ: Answers to frequently asked questions

Is it possible to reset Redmi Note 9 without losing data?

No, a full reset always deletes user data. However, you can:

  • Create a backup via Settings → About phone → Backup.
  • Copy files to PC or SD card manually.
  • Use Google Photos for automatic backup of photos.

If the phone is locked but turns on, connect it to the PC and copy the data via MTP (if unlocking is not required).

After resetting the phone asks for the old one password. What to do?

This is FRP Lock (Google protection) or Mi Account Lock. Solutions:

  1. Enter the details of the last connected account Google or Mi.
  2. If your account is deleted, restore it through official services (Google or Xiaomi).
  3. If you forgot your data, contact the service center with proof of purchase (receipt, box).

Bypassing blocking without official methods violates the user agreement and can lead to blocking of the device.

How long does a reset take?

Time depends on the method:

  • Through settings: 5–15 minutes.
  • After Recovery: 10–20 minutes (including reboot).
  • After Fastboot: 2–5 minutes (but requires preparation on a PC).

If the process took more than 30 minutes, something went wrong Turn off the phone (press Power to 15. seconds) and try again.

Is it possible to reset the phone without a password?

Yes, but only after Recovery Mode or Fastboot:

  1. If the phone turns on but is locked, use Recovery (method 2).
  2. If the phone does not turn on, connect it to the PC and reset via Fastboot (method 3).

Both methods will delete all data, including the password.

After the reset, the camera/Wi-Fi/Bluetooth does not work. What should I do?

This may be due to:

  • Damaged firmware — reflash the phone via Mi Flash Tool.
  • Module failure —check at the service center.
  • Settings failure —reset the network settings (Settings → System → Reset settings → Reset network settings).

If the problem persists, flash the phone official firmware for your model (you can download it on official website Xiaomi).