How to update the firmware on Xiaomi Mi 9: all the ways and nuances

The Xiaomi Mi 9, released in 2019, is still popular with users thanks to its powerful hardware and support for updates. However, with the release of new versions of MIUI and Android, owners are faced with the question of how to update the firmware correctly so as not to lose data and turn the phone into a “brick.” In this article, we will analyze all the current ways of updating, from standard OTA to manual firmware through Fastboot, and also talk about the pitfalls that you can encounter.

It’s important to understand that the Mi 9 officially received the last major update to MIUI 14 based on Android 12, but informal firmware (such as Xiaomi.eu or custom ROM) may offer more recent versions. We’ll look at both official methods and alternatives — with an indication of the risks and benefits of each. If you’ve never flashed a smartphone before, start with an automatic update through the settings.

1. Preparation of the smartphone for the update

Before you start updating the Xiaomi Mi 9, you need to follow a few critical steps: neglecting them can lead to data loss, device freeze or even “brickle up”.

• 📱 Open the Settings. → The phone. → Version. MIUI. Remember or write down the current version (for example, MIUI 13.0.4 Stable).
• 🔋 Make sure your battery is at least 60%, and when upgrading via Fastboot or Recovery, charge up to 100%.
• 📡 Connect to a stable Wi-Fi network – downloading firmware “over the air” can take up to 1-2 GB of traffic.
• 🔄 Back up important data, even if you're not. OTA-Update possible failures.

Pay special attention to free space in memory. Update via Recovery or Fastboot requires at least 3-4 GB of free space. If memory is scarce, transfer files to your computer or cloud, or use a memory card (if supported).

⚠️ Note: If your Mi 9 is unlocked (Custom Recovery or Bootloader installed), official updates OTA In this case, use only manual firmware methods.

Check MIUI and Android | Charge battery to 60%+| Connect to Wi-Fi |Free 3-4 GB of storage | Make backup data | Disable VPN/proxy (if you use)

-->

2. Method 1: Automatic OTA Update

The easiest and safest method is an over-the-air update (OTA), which is suitable for most users, as it does not require additional tools and saves all the data.

1. Go to Settings → About the phone → System update.
2. Click the Check Updates button. If the update is available, a notification will appear.
3. Download the firmware (the weight of the file is usually 1.5-2.5 GB).
4. After download, click Set and wait for the reboot.

It takes 10 to 30 minutes depending on the size of the update. The smartphone will reboot several times, which is normal. If the device is stuck on the Mi logo after the upgrade, wait 10 to 15 minutes. If nothing changes, start resetting through Recovery.

If the update is not available, the following reasons are possible:

• 🌍 Your region does not support the latest version (for example, global firmware lags behind Chinese firmware).
• 🔒 The device is unlocked or stitched with custom firmware.
• 📵 Xiaomi servers are temporarily unavailable (check the Internet connection).

Once a month |Only when critical updates |Never update |Only manually

-->

3. Method 2: Update via Mi PC Suite

If OTA-Update is not available or errors occur, you can use the official Mi utility PC Suite.This method is suitable for firmware recovery after crashes or when switching from one version MIUI Instructions for the next (e.g. Chinese to global:

1. Download and install Mi PC Suite from the official website.
2. Connect the Mi 9 to your computer via the original USB-cable (it is desirable to use the port) USB 2.0 for stability).
3. Turn on the USB Debugging mode on your phone (Settings → About Phone → MIUI Version → 7 times click on the version, then go back to Settings → Additional → For Developers).
4. Launch Mi PC Suite, wait for device recognition and select Update.

The software will automatically check for available updates and suggest you download the latest version, and the advantage of this method is that you can roll back to the previous firmware if the new version is unstable.

⚠️ Attention: If Mi PC Suite does not see the device, try reinstalling the driver manually through Device Manager (select Device Manager). ADB Interface for Xiaomi. Also disable the antivirus - it can block the connection.

Method 3: Manual firmware through Recovery

If the automatic methods don't work, you can install firmware manually through Recovery, which is suitable for power users, because it requires downloading firmware and manipulating system files.

Instructions:

1. Download the firmware for Mi 9 (codename cepheus in.zip format, miui_CEPHEUSGlobal_V14.0.2.0.TFAMIXM_....
2. Rename the file to update.zip and move it to the root folder of the phone’s internal memory.
3. Turn off the device, then press Volume up + Power to enter Recovery.
4. Select Install update.zip to System (Management – volume buttons, confirmation – power button).
5. Wait for the installation and reboot to finish.

If you have a logo or error after you have firmware, try resetting your settings via Recovery (Wipe Data → Wipe All Data).This will delete all data, so backup in advance.

5. Method 4: Fastboot Firmware (for experienced)

Fastboot is the most reliable method for recovering a bricked-up device or installing custom firmware, but it requires an unlocked bootloader and knowledge of commands. All data will be deleted! If you're a beginner, you better go to the previous methods.

What you need:

• 🖥️ Computer with installed ADB Fastboot (you can download it in Android) SDK).
• 🔌 Original. USB-cable (preferably from the set).
• 📄 Firmware in.tgz or.zip format for Fastboot (download from Xiaomi Firmware Updater).

Step-by-step:

1. Unpack the firmware in a folder with fastboot (for example, C:\platform-tools\).
2. Turn off the phone and press Volume Down + Power to enter the Fastboot (a hare in a hat-eared hat will appear).
3. Connect the device to your PC and check the connection with the command: fastboot devices must display the serial number of the phone.
4. Run the firmware command (for Windows): fastboot flash all or (for firmware with file separation): flash_all.bat

It takes 5-10 minutes. When it's finished, the phone automatically reboots. If you have an anti-rollback error, you're trying to install an older version of MIUI than you already have, and you need a security-bypass firmware (see 4PDA or XDA-Developers forums).

💡

If fastboot doesn’t recognize the device, try disabling the driver signature in Windows: run the command prompt on behalf of the administrator and perform bcdedit /set nointegritychecks on, then restart the PC.

6. Frequent errors and their solutions

When updating Xiaomi Mi 9 users face typical problems, let’s consider the most common and ways to fix them:

If the sound is gone after the update, the camera is not working or there are other problems, try:

• 🔄 Reset the settings to factory (Settings) → Additionally. → Recovery and discharge).
• 📥 Fastboot the device (see Method 4).
• 🤖 Install a custom core or patch (for power users).

⚠️ Note: If the Mi 9 is no longer defined by your computer in Fastboot, check the port USB Often the problem is physical damage to the connector on the phone (especially if you've fallen or got wet before).

7. Alternative firmware: pros and cons

Official updates for the Mi 9 are no longer coming out, but enthusiasts continue to support the device through custom firmware.

• 🌍 Xiaomi.eu – Optimized version MIUI without Chinese services, with weekly updates.
• 🤖 LineageOS or Pixel Experience – “pure” Android without a shell MIUI.
• ⚡ Custom ROM (For example, ArrowOS, HavocOS) - firmware with advanced settings.

Advantages of custom firmware:

• ✅ More recent versions of Android (up to Android 13-14).
• ✅ Lack of advertising and unnecessary applications.
• ✅ Additional features (e.g. navigation gestures, themes).

Disadvantages:

• ❌ Risk of “bricking” when installed incorrectly.
• ❌ Camera bugs are possible, NFC sensory.
• ❌ Loss of warranty (if it is still valid).

To install custom firmware will require:

1. Unlock bootloader (officially via Mi Unlock Tool)
2. Install custom recovery (e.g., TWRP).
3. Switch ZIP-file firmware and GApps (if you need Google services).

💡

Castom firmware gives a second life to old devices, but requires technical skills. If you're not confident, stay on the official MIUI.

FAQ: Answers to Frequent Questions