Resetting settings on Xiaomi 9T: all ways with instructions and warnings

Xiaomi 9T (also known as Redmi K20 in some regions) is a popular smartphone with powerful hardware and flexible MIUI firmware. But even such a reliable device sometimes requires a complete reset: whether it is preparing for sale, eliminating critical errors or fighting viruses. In this article, we will discuss all the current ways of resetting – from soft reboot to hard recovery via Fastboot – and also tell you how to avoid typical errors and save important data.

It's important to understand that resetting is not a universal solution, like if your Xiaomi is a customizable device. 9T not enabled due to damaged firmware, it may be necessary to flash through EDL-And if the problem is in the hardware (e.g., a failed battery), software manipulation won't help.

This article is relevant for all Xiaomi 9T modifications (including 9T Pro and global/Chinese versions) based on MIUI 12-14 and Android 10-13. If you have custom firmware (for example, LineageOS or Pixel Experience), some menu items may differ.

1.When you need to reset settings on Xiaomi 9T

Resetting to factory settings is an extreme measure, which is resorted to in several cases:

• 📱 Preparing for sale or transfer: To delete all personal data (photos, messages, accounts) and return the smartphone to a "clean" state.
• 🐢 A severe slowdown. If Xiaomi 9T brakes, overheats or constantly issues errors such as "System interface stopped", reset can help.
• 🔒 Forgotten pattern lock or PIN-In this case, resetting is the only way to unlock the device (but you will need to confirm your Mi Account account).
• 🦠 Viruses or malware: If the antivirus detects threats that are not removed by standard methods.
• 🔄 Failed firmware upgrades, like after custom recovery installation (TWRP) or unofficial firmware smartphone stuck on the logo.

However, resetting will not help if:

• 🔋 Battery swollen or does not hold charge (replacement is needed).
• 📡 Network problems due to damaged module Wi-Fi/Bluetooth.
• 💧 Got moisture under the screen or on the motherboard.

⚠️ Note: If you are resetting Xiaomi 9T If you have a forgotten password, but don't remember the Mi Account, the device can lock forever.

2.Resetting preparation: what to do in advance

Before you reset your settings, be sure to follow these steps to avoid losing important data:

1. Create a backup copy: 📁 Contacts, SMS The call log can be saved through the settings. → Google → Backup. 📷 Photos and videos can be copied to your PC or cloud (Google Photos, Mi Cloud). 🎮 Save games (if important) move through Helium or Root Manager.

Make sure you know:

• 🔑 Login and password from Mi Account (if linked to the device).
• 📶 Passwords from Wi-Fi networks (you can export them through applications such as WiFi Password Viewer).
• Charge your smartphone by at least 50% to avoid turning it off during the process.

If you are planning a reset due to a sale, untie all accounts:

• 📌 Mi Account: Settings → Xiaomi account → Get out.
• 📌 Google Account: Settings → Accounts. → Google → Delete the account.
• 📌 Cards and payment systems: delete data in Google Pay, Samsung Pay, etc.

Make backup contacts and photos|Remember the data from the Mi Account|Charge the phone. >50%|Unlock Google and Mi accounts|Save Wi-Fi passwords-->

⚠️ Attention: If on Xiaomi 9T Device Protection (in some regions) is enabled, and the old one may need to be entered after resetting PIN-code or password from Mi Account, even if you untie it! → Additionally. → Confidentiality → Device protection.

Method 1: Soft Reset without data loss

If the Xiaomi 9T is just slowing down or behaving unstablely, try a soft reboot.This method doesn't delete data, but clears the cache and restarts system processes.

Instructions:

1. Hold the Power button for 10-15 seconds until the screen goes out.
2. Wait 30 seconds, then turn on the smartphone with the power button.
3. If the device doesn’t respond, try the Power + Volume combination (hold 20 seconds).

For deeper cleaning (without deleting data), clean the cache:

1. Go to Settings → Memory → Cleanup.
2. Click on "Clean up garbage" and "Deep cleaning."
3. Reset the device.

If soft reset does not help, proceed to the next method.

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After a soft reset, check the space in the memory: if it is less than 1 GB, it can cause the brakes.

Method 2: Reset via the settings menu (Hard Reset)

It's a standard reset method that deletes all data, including apps, settings and files, and is suitable if the smartphone turns on and responds to touch.

Step-by-step:

1. Open the settings (cog icon).
2. Go to the About Phone section.
3. Slip on "Reset" (in some versions of MIUI this item may be called "Recover and Reset").
4. Select “Reset All Settings” (not to be confused with “Reset Network Settings”).
5. Enter. PIN-code or password (if requested).
6. Confirm the action by clicking "Delete everything".

The process will take 3-10 minutes. Once completed, the smartphone will restart and suggest that it be configured as new.

⚠️ Attention: If on Xiaomi 9T Encryption of data (Settings) has been enabled → Security → Encryption, resetting via Recovery or Fastboot may make it impossible to boot the system further! EDL.

5. Method 3: Reset via Recovery Mode (if the phone doesn't turn on)

If the Xiaomi 9T is stuck on the logo, reboots cyclically or doesn’t respond to touch, use Recovery Mode, which works even without access to the main system.

How to log in to Recovery:

1. Turn off your smartphone (hold power for 10 seconds).
2. Press the Power + Volume combination and hold until the Mi logo appears.
3. Release the buttons and you will see the Recovery menu (in English or Chinese).

How to reset your settings:

1. Use Volume ± buttons for navigation and Power to select.
2. Select "Wipe Data" (or "in Chinese").
3. Confirm "Wipe All Data" (or ").
4. Wait until it is finished (the screen will show the inscription "Data wipe complete").
5. Select "Reboot" →"Reboot to System".

If the Recovery menu is in Chinese, focus on the location of the items:

• 📛 The first point is reset ().
• 🧹 Second item: discharge ().
• 🔧 The third point is the connection to the PC (MIAssistant).

6. Method 4: Fastboot Reset (for advanced users)

This method is used if:

• 🔄 Recovery is damaged or not opened.
• 📦 You need to reflash the smartphone (for example, after a failed update).
• 🔒 The device is locked and the standard methods do not work.

What you need:

• 💻 Windows computer (or Linux/macOS driverless ADB).
• 🔌 Cable USB Type-C (preferably original).
• 📦 Mi Flash Tool (for firmware) or ADB/Fastboot.

Instructions for resetting via Fastboot:

1. Turn off the Xiaomi 9T.
2. Press Power + Volume – until the Fastboot logo appears (Android robot with an open stomach).
3. Connect your smartphone to your PC.
4. Open the command line (Win + R → enter cmd) and execute the commands: fastboot devices (should display the serial number of the device) fastboot erase userdata fastboot erase cache fastboot reboot

If you need to completely reflash your smartphone (for example, after an update crash), download the official firmware for Xiaomi 9T (Redmi K20) from en.miui.com and use the Mi Flash Tool.

⚠️ Attention: fastboot erase commands delete data irrevocably. If you are mistaken with the firmware model (for example, stitched through the computer). 9T Pro instead 9T), Smartphone can turn into a brick! Check the name of the firmware file - for Xiaomi 9T It must contain davinci (code name of the device).

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Fastboot reset is the most radical method, only use it if other methods have not worked and you are confident in your actions.

7.What to do after resetting settings

After a successful reset, the Xiaomi 9T will turn on as new.

1. Set up language and region: 🌍 Choose "Russian" (or other language you need). 📍 Please specify “Russia” (or your country) to avoid problems with Google services.
2. Connect to the network: 📶 Select Wi-Fi and enter your password (if you saved it in advance). 📡 If Wi-Fi is not working, check your router settings or use mobile internet.
3. Log in to the accounts: 🔑 Add Mi Accounts first (if previously tied). 📧 Google Account to Access Play Market.

Recover data

• 📁 If you have backups made through Mi Cloud, select Restore from backup".
• 🖥️ If you have a copy on your PC, transfer the files through USB Xiaomi File Manager.

After data recovery, check:

• 🔄 Update the firmware: Settings → The phone. → Updating the system.
• 🛡️ Install an antivirus (such as Malwarebytes) and scan the system.
• 🎯 Disable unnecessary system applications through Settings → Annexes → Application management.

If the Xiaomi 9T has become slower than before after the reset, there may be a problem with a worn-out battery or overheating of the processor.

8. Frequent errors and their solutions

When resetting settings on Xiaomi 9T, users face typical problems.

If none of these methods worked, there might be a problem with the hardware.

• 🔋 Bloated battery can block the normal operation of the smartphone.
• 🔌 Oxidized contacts on the motherboard (if the phone fell into the water).
• 🖥️ Damaged memory chip (in this case, the smartphone may not turn on at all).

In such cases, contact the service center. Self-repair without experience can aggravate the problem.

FAQ: Answers to Frequent Questions