Reflashing found Xiaomi Redmi 9: unlock, firmware selection and installation

Found Xiaomi Redmi 9 smartphone with locked screen or tied account Mi-Account — a typical situation faced by users of used technology. flashing the device can solve the problem of locking, but requires care: the wrong actions will lead to a “brick” (inoperable device). In this article, we will discuss legal ways to unlock, select the right firmware and step-by-step installation process through Fastboot and Recovery.

It’s important to understand that flashing a found phone has legal and ethical nuances. If the device isn’t yours, first try to return it to the owner through the police or Xiaomi service centers. This instruction is intended for owners who have forgotten the password, or for those who bought the phone from hand and faced a previous account lock.

1. Firmware Preparation: What You Need to Know Before You Start

Before you start flashing Redmi 9 (codenamed Lancelot), check out a few key points:

• 🔋 Battery charge at least 50%, and interruption due to discharge will damage system files.
• 🔐 Xiaomi has it locked by default. If the owner has not previously unlocked, you will need official permission through the Mi Unlock Tool (more in the next section).
• 📥 Firmware version. Find out the current version. MIUI through settings → About the phone (if the phone is unlocked) or using the command fastboot getvar product.

If the phone is completely locked (not known) PIN-The only way to get around the lock is to completely reflash the data with the data clearing. However, this will only work if the bootloader is unlocked. Otherwise, you will need official unlock through Xiaomi, which can take up to 360 hours (15 days) of waiting.

⚠️ Warning: Flashing will reset all the data on the phone, including photos, contacts and messages. If the device is found, it will be impossible to restore the information of the previous owner.

2 Unlocking the bootloader (Bootloader)

The bootloader on Xiaomi Redmi 9 is locked by default. To unlock it, you will need:

1. Download the official Mi Unlock Tool from Xiaomi website.
2. Sign in to the utility under the same Mi-Account account that is linked to the phone, and if the account is someone else's, unlocking is impossible without the owner's consent.
3. Connect the phone in Fastboot mode (clamp Power + Volume down when the phone is off).
4. Follow the instructions of the program. The first unlock will take up to 360 hours (7 days of waiting + SMS confirmation).

If you find the phone and you don't know the previous owner's identity, you can't officially unlock it, so there are two options:

• 🔓 Unofficial methods (e.g., exploits in older versions) MIUI). Risky – can lead to blocking IMEI.
• 📱 Contact the service center with proof of purchase (check, contract) without documents in the unlock will be refused.

⚠️ Note: Use of informal tools to bypass Mi-Account (e.g., Mi-Account, EDL Mode) requires special equipment and may violate warranty.Redmi 9 with MediaTek Helio processor G80 This method works unsteadily.

Make sure your phone is 50%+ charged

Download Mi Unlock Tool from the official website

Prepare. USB-cable (original or high quality)

Check if your phone is tied to your Mi-Account-->

3. firmware selection for Redmi 9

For Xiaomi Redmi 9 (model M2004J19C) available three types of firmware:

For the phone you find, the best choice is the latest version of the official Fastboot firmware, which is guaranteed to be compatible with hardware and will reset all data, including Mi-Account.

If you plan to use custom firmware, make sure it supports the lancelot model.

• 📱 LineageOS 20 (Android 13) - minimalist interface, no unnecessary applications.
• 🎨 PixelExperience – firmware with pure Android and features from Google Pixel.
• ⚡ Havoc-OS is flexible but requires experience.

💡

Before downloading the firmware, check its hash amount (MD5) using the MD5 Checker utility. This will protect against fake files with viruses.

4. Install firmware via Fastboot (full reset)

If the bootloader is unlocked, the most reliable way to reflash the phone is to use the Fastboot.

• 🖥️ Computer with Windows/Linux and installed Xiaomi drivers.
• 🔌 Original. USB-cable (cheap cables may not transmit data to Fastboot).
• 📁 Firmware archive (.tgz or.zip) and Mi Flash Tool utility.

Step-by-step:

1. Unpack the firmware archive in a folder without Cyrillic characters (for example, C:\MIUI\).
2. Install the Mi Flash Tool and run on behalf of the administrator.
3. Turn off the phone and put it in Fastboot mode (clip Power + Volume down).
4. Connect your phone to your PC. In the Mi Flash Tool, press Refresh, the device needs to be determined.
5. In the Select field, specify the path to the firmware folder.
6. Select Clean All mode (complete data cleanup) and press Flash.

It takes 5-10 minutes. When it's done, it automatically reboots to the clean system. If you have an anti-rollback error, you're trying to install an older version of MIUI than the one on the phone, in which case, download a newer firmware.

5. Alternative method: Firmware through Recovery

If the bootloader is locked but the phone is turned on (e.g. known) PIN-code, but tied to someone else's Mi-Account, you can try flashing the device through Recovery, which doesn't require unlocking the bootloader, but has limitations:

• ✅ It only works with official recovery firmware.
• ❌ Will not reset Mi-Account if it was tied.
• ⚠️ Signature verification failed (if the firmware is not signed).

Instructions:

1. Download Recovery firmware from the official website (file with extension.zip).
2. Rename the file to update.zip and place it at the root of the phone’s internal memory.
3. Turn off the phone and press Power + Volume up to enter Recovery.
4. Select Install update.zip to System (navigation is done with volume buttons, confirmation is done with power button).
5. After installation, select Reboot to System.

If after the reboot the phone requires Mi-Account data entry, this method did not work, in which case only unlocking the bootloader or contacting the service center remains.

💡

Firmware through Recovery doesn't remove Mi-Account! this method is only suitable for system updates or resets if the phone is already unlocked.

6. Solving common errors

When flashing Redmi 9 users often face typical problems.

If the phone is stuck on the Xiaomi or Redmi logo after firmware, try:

1. Press Power + Volume up for 10-15 seconds for forced reboot.
2. Repeat the firmware with full cleaning (Clean All in the Mi Flash Tool).
3. Install a different firmware version (e.g., try EEA instead of Global).

⚠️ Note: If you have lost your firmware after IMEI or the network is not working, the folder has probably been damaged. /efs. It can be restored only through a backup copy or in the service center.

7.What to do after a successful firmware

After the first download of the new software:

• 🔄 Go through the initial setup, connect to Wi-Fi.
• 🔒 Install a new one. PIN-code.
• 📲 Link your phone to your Mi-Account (this will protect you from locking in the future).
• ⚙️ Check the operation of the main functions: calls, mobile Internet, camera, fingerprint sensor.

If custom firmware was used, additionally:

• 🔧 Install Magisk to obtain root rights (optional).
• 📡 Check compatibility with Google Services (some firmware requires separate installation of Gapps).
• 🔄 Update the firmware to the latest version through OTA manually.

If the phone is found, we recommend:

• 📞 Check contacts and messages for information about the owner.
• 🚔 Contact the police to transfer the phone if you find the previous owner’s details.

💡

After firmware, disable automatic MIUI updates in settings (Settings → About Phone → System Update → Three Points → Settings → Auto Update) This will prevent accidental installation of error versions.

FAQ: Frequent questions about Redmi firmware 9