How to Update Xiaomi Mi 9T: The Complete Guide

Owners of the legendary Xiaomi Mi 9T often wonder about extending the life of their device, and the most effective way is to install the current version of the software. Despite the fact that the model came out several years ago, a competent update allows you to keep the interface speed and get the latest security patches. The process can range from simple download through the settings menu to complex manual installation of firmware through Recovery.

In this article, we will take a look at all the available methods so you can choose the most suitable for your situation, learn how to prepare your smartphone for the procedure, what tools you may need, and how to avoid common errors that can lead to data loss. Relevance of the software is critical for stable application operation.

Before you start taking action, it’s worth noting that the upgrade is not just about new features, but also about optimizing power consumption. Many users notice that after a clean installation of the fresh version of MIUI, the battery starts to last significantly longer. However, there is no rush here, so carefully study each step of the instructions.

Preparation of the device for installation of a new version of the software

The first step before any manipulation of system files is careful preparation. Ignoring this stage can cause the process to stop halfway and the phone to go into a reboot cycle. You need to make sure that the battery is at least 60%, although it is best to connect the device to a power source throughout the procedure.

Make sure to back up all important data, as when you switch between major Android versions or change your firmware region, you may lose your data. Use the built-in backup function in Settings → Advanced Settings → Backup or sync your contacts and photos with your Google and Mi Cloud account.

Also check for free space in internal memory. To download and unpack the installation package, the system requires a significant amount of space, usually from 3 to 5 GB. If memory is scarce, delete unnecessary applications or transfer media files to your computer.

• 🔋 Charge your smartphone to at least 60% and keep the charger on hand.
• 💾 Free up at least 5 GB of free space in internal storage.
• 📶 Make sure you have a stable Wi-Fi connection to download large files.
• 🔒 Unlock the lock screen and remember the password from the Mi Account.

⚠️ Note: If modified system files are installed on the phone or Root access is obtained, a standard update may not be installed or lead to unstable system operation.

After completing all the preparatory steps, you can proceed directly to the selection of the upgrade method. There are several ways to solve the problem, each of which has its own characteristics and requirements for the user's skills.

Automatic update via the settings menu (OTA)

The easiest and safest way to get a new firmware version is to use the built-in OTA (Over-The-Air) mechanism.The system independently checks the servers for updates and suggests installing them if they are compatible with your current version and region.

To start the check, go to Settings → About Phone and click on the MIUI version icon. If the update is available, the Download and Install button will appear. The package will start downloading in the background, after which the device will prompt you to restart for changes.

Sometimes it happens that the phone writes "No Updates found" even though the servers already have a new version, which often involves the gradual distribution of updates when files come to users in waves, in which case it is worth waiting a few days or trying to change the region in the settings.

It is important not to interrupt the installation process, even if it seems to be getting stuck. The screen can go out and turn on several times, and the Xiaomi logo can burn longer than usual.

• 📲 Go to About Phone and select Update Checker.
• ⏳ Wait for the download to be completed and the automatic installation.
• 🔄 Do not turn off the device until the desktop is fully loaded.

Manual installation via Recovery Mode

If automatic search doesn’t work or you want to install a specific version of firmware that the system doesn’t offer, use the manual installation method. To do this, you will need to download the.zip (Recovery ROM) firmware archive from the official website or a trusted resource.

The downloaded file must be placed at the root of the smartphone's internal memory. Then, through the settings menu, call the manual installation: click multiple times on the MIUI version icon until the file selection menu appears, specify the path to the downloaded archive and confirm the action.

This method allows for updating, even if OTA-servers are temporarily unavailable, but it is important to strictly comply with the firmware region, EU, Russia) with the current region of the device, otherwise the installation may be blocked during the verification phase.

⚠️ Note: When manually installed via Recovery, all user data is usually stored, but the risk of error is higher than when installed. OTA. Be careful when choosing a file.

In some cases, the system may require a screen unlock password before installing, a security measure to prevent unauthorized software modifications. Once installed successfully, the phone will restart and the process will take longer than usual.

Update via Fastboot and computer

For advanced users who have encountered serious errors or want to change the firmware region (for example, from China to Global), the method through Fastboot is suitable. USB and Mi Flash Tool utility.

Unlike the Recovery method, it uses a firmware in.tgz format that must be pre-unpacked. The phone is converted to Fastboot mode by pressing the volume button when turned off, and then connects to the PC.

In the Mi Flash Tool, you select the path to the unpacked firmware folder and click the Flash button. Note the switch in the bottom corner: Clean all mode will completely delete all data, and save user data will try to save it, but can cause errors when changing regions.

fastboot devices

This command in the computer's command line will help make sure the device is correctly defined in Fastboot mode.If the list is empty, check the drivers or connection cable.A successful update via Fastboot ensures a clean system installation without debris from older versions.

• 💻 Install the drivers. ADB Mi Flash Tool on the computer.
• 📥 Download Fastboot firmware and unpack the archive.
• 🔌 Transfer your phone to Fastboot mode and connect to the PC.
• ▶️ Start the firmware process in the utility by selecting the desired cleaning mode.

Comparison of MIUI versions for Xiaomi Mi 9T

Selecting a firmware version is always a trade-off between novelty and stability. The Mi 9T has multiple generations of shells available, each with its own features to consider before upgrading.

Users often argue about whether to upgrade to newer versions if the current one is stable, and here is a table that will help you compare the key features of different MIUI versions for this device.

It’s worth noting that newer versions require more resources.If your Xiaomi Mi 9T is used as a primary working tool, it might make sense to stay on the proven version of MIUI 12.5, which is considered one of the most optimized for this model.

When choosing a version, also consider the frequency of security updates. Global firmware can receive patches less often than Chinese, which is important for users who store sensitive information on the device.

Solving errors during the update

During the update process, users may encounter problems ranging from the “failed to update” error to the endless reboot, most often due to a damaged firmware file or space shortage.

If you see an error message when installing an OTA, try clearing the Update app cache. To do this, go to Settings → Apps → All Apps → Update Components and select “Clean.” After that, try again to download.

In case the phone is stuck on the logo after the upgrade, it may need to be reset to factory settings via Recovery. To do this, press the power and volume button, select the language and press Wipe Data.This action will delete all files, so backup is mandatory.

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If the update is continuously interrupted 50-70%, Try to remove the update file from the folder downloaded_rom Download it again via stable Wi-Fi.

Problems can also arise when using modified versions of the launcher or system fonts, and before updating, it is recommended to return all visual settings to standard values.

⚠️ Note: If your fingerprint or camera stopped working after the update, the integrity of the system partition was likely compromised.

Frequently Asked Questions (FAQ)

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Regular firmware updates are the best way to ensure data security and extend the life of your Xiaomi Mi 9T, but require careful attention to the details of the process.