The smartphone Xiaomi Redmi 9T, released at the beginning of 2021, was initially supplied with an operating system Android 10 on top of the shell MIUI 12. For many users, the issue of software relevance is acute, since support for older versions is ending, and new applications require fresh APIs. The process of upgrading the firmware on this model has its own characteristics related to the company's update policy and regional differences in versions.
Updating a device is not just changing the picture on the lock screen, but an important step in extending the life of the gadget. Owners Redmi 9T can count on receiving major updates, including the transition to Android 11 and Android 12 with the corresponding versions MIUI 12.5 and MIUI 13. In some regions, assemblies based on Android 13 (MIUI 14) and even a transition to a new ecosystem are already being tested or available. Understanding the mechanisms for installing update packages will allow you to avoid common mistakes and keep all data intact. HyperOS. Understanding the mechanisms for installing service packs will allow you to avoid common mistakes and keep all your data intact.
Before taking active steps, you need to assess the current state of your device. There are several ways to install a new version of software: standard over-the-air (OTA), manual installation via the Recovery menu, and using specialized software on a PC. The choice of method depends on whether your phone receives automatic notifications and how big the difference is between the installed and target firmware version.
Preparing the device for installing updates
Any tampering with system files carries certain risks, so the preparation stage is critically important. Ignoring simple security rules can result in your phone turning into a brick or losing some user data. The first step is to create a complete backup of all important information: contacts, photos, instant messenger conversations and application settings.
⚠️ Attention: Before starting the update process, make sure that the battery charge is at least 60%. Installation interruption due to low battery is one of the most common causes of device failure.
Free up enough space in the internal storage. Although the system itself usually checks for free space before loading, having a buffer of 5–10 GB ensures that the process of unpacking archives will go smoothly. It is also recommended to disable any third-party optimizers or antiviruses that may block system services during a reboot.
Check the stability of your Internet connection. Downloading 2-3 GB firmware over a mobile network can take a long time and exhaust your data plan. Using a reliable network Wi-Fi is preferable, as it provides a more stable data transfer speed and reduces the risk of damage to the downloaded file due to lost connections.
☑️ Pre-update checklist
Automatic update through the settings menu (OTA)
The easiest and safest way to get the new version of Android is to use the built-in update mechanism. The system itself checks the manufacturer's servers for new builds that are suitable specifically for your region and hardware configuration. This method is ideal for those who do not want to delve into technical details and prefer to minimize risks.
To start the scan, go to the main menu of your settings Redmi 9T. Find the About phonesection, which is usually located at the very top of the list of parameters. Inside this menu there will be an item MIUI version or System version. Clicking on the version icon will start an automatic check for updates.
If new firmware is available, a window will appear on the screen describing the changes and a button Download. Once the download is complete, the system will prompt you to install the update. At this point, the phone will reboot and begin the installation process, which may take from 10 to 30 minutes depending on the memory speed and the amount of changes.
If the update button is inactive or the system says “You are using the latest version”, but you know about the release of new software, try changing the region in the settings (Settings → Advanced settings → Region) to the country where the update has already been released, for example, India or Indonesia.
It is worth noting that updates come in waves. Even if a new version has already been released for your model, it may not be available for your specific device right away. This is a normal practice that allows servers to cope with the load and identify critical errors on the first batches of devices.
Manual installation of firmware via Recovery
Sometimes automatic updates do not arrive for months, or the user wants to upgrade to a specific firmware version that is not yet available for his region via OTA. In such cases, the manual installation method through the Recoverymode comes to the rescue. This method requires first downloading the firmware file from an official source.
The firmware file must have the extension .zip and be intended specifically for the model Redmi 9T (code name lime). Using firmware from other models, such as Redmi 9 or Note 9, is strictly prohibited and will result in the device not working. The downloaded file must be renamed to update.zip and placed in the root directory of the phone's internal memory.
Next you need to enter recovery mode. To do this, turn off your smartphone completely. Then hold down the Volume Up button and the Power button at the same time. Hold them until the logo appears Mi, then release the power button, but continue to hold the volume until the menu appears Recovery.
What to do if Recovery is in English?
In Recovery mode, control is carried out by the volume buttons (up/down) and the power button (select). If the menu is in Chinese, select the first line (usually the language selection), then find English in the list. After changing the language, the interface will become clear.
In the Recovery menu, select the item Install update.zip to System One (or similar, depending on the version of Recovery). Confirm the action and the flashing process will begin. When finished, select Reboot to reboot in normal mode. The first boot after manual installation may take longer than usual - up to 5-7 minutes.
| Update method | Complexity | Risk of data loss | Need for a PC |
|---|---|---|---|
| OTA (By air) | Low | No | No |
| Recovery (Manual) | Medium | No (updating) | No (needed for downloading) |
| Fastboot (Via MiFlash) | High | Yes (full cleaning) | Yes |
| TWRP (Custom) | High | Depends on actions | Yes |
Update via computer and Mi Flash utility
For the most advanced users or in cases where the phone does not boot into system, there is a method of flashing the firmware via a computer using the utility Mi Flash Tool. This method requires unlocking the bootloader, which is a separate procedure that takes from 7 to 15 days of waiting after submitting an application to the Xiaomi service.
The process begins by switching the smartphone to Fastbootmode. To do this, connect the switched off device to the PC with a USB cable while simultaneously pressing the volume down and power buttons. An image of a hare repairing a robot will appear on the screen, indicating successful entry into the mode. In Windows Device Manager, the phone should be identified as Android Bootloader Interface.
Run the app Mi Flash on the computer. Specify the path to the folder with the unpacked firmware (important: the path should not contain Cyrillic characters or spaces). At the bottom of the window, select the firmware mode. For a clean update, the best mode is clean all, which completely erases user data, or clean all and lock, which also returns the bootloader lock.
⚠️ Attention: Using the mode
clean allwill lead to the complete deletion of all photos, contacts and applications. Be sure to make a backup copy to external media before starting the procedure.
Press the button Flash and wait for the process to complete. A progress bar will show the status of the operation. Successful completion is indicated by green color and the inscription Flash Done. After this, the phone will automatically reboot. This method allows you not only to update Android, but also to restore the device after serious software failures.
Transition to HyperOS and features of MIUI 14
Xiaomi is active introduces a new operating system HyperOS, which replaces the familiar MIUI. For owners Redmi 9T this transition can be a significant event, since the new shell is optimized to work on mid-segment devices. However, the upgrade to HyperOS is not available for all regions at the same time.
The main differences of the new system are the redesigned kernel and improved resource management. Users report smoother animations and better battery life. If your device supports updating to HyperOS 1.0, a notification will appear in the About Phone menu. The installation process is similar to updating to MIUI 14.
It is worth considering that switching to a new OS may temporarily affect performance. In the first days after the update, the system indexes files and optimizes applications in the background. This can cause the case to heat up and drain the battery quickly. Usually the situation stabilizes within 3-5 days of active use.
If the automatic update to HyperOS does not arrive, you can use the application MIUI Downloader or the official community forum to search for the latest firmware version. It is important to check the type of firmware: Recovery (for installation via the menu) or Fastboot (for firmware via PC).
The transition to HyperOS requires more free space than regular MIUI updates. It is recommended to free up at least 10-15 GB before installing a new shell.
Solving common problems when updating
Despite the smooth running of the processes, users may encounter various errors. One of the most common problems is the message “Failed to check for update” or an endless download. This is often due to a full update service cache or an unstable connection to the server.
To solve the problem, try clearing the data in the System Software Update application. Go to Settings → Applications → All applications, find “System software update” (or Updater) in the list and click Clear → Clear all. After that, run the update check again.
Another situation is when an error appears when installing manually via Recovery. This often happens if you try to roll back to an older version of Android (downgrade) or switch from Chinese firmware to global firmware without unlocking the bootloader. The protection system will not allow you to install an unsigned or incompatible package.
If the phone is stuck at the logo after the update (“bootloop”), try entering Recovery mode and performing a factory reset (Wipe Data). This will delete all data, but may save the system from complete collapse. In extreme cases, flashing via a computer in Fastboot mode will be required.
Is it possible to update the Redmi 9T to Android 13 or 14?
Xiaomi has officially released updates for the Redmi 9T to Android 12 (MIUI 13) and Android 13 (MIUI 14) depending on the region. Updating to Android 14 is possible within the HyperOS shell, but its availability depends on the specific modification of the device and the firmware region. For global versions, support may be limited to Android 13.
Will the update delete my photos and contacts?
When updating using standard methods (OTA or via Recovery without full wipe mode), all user data is saved. However, the risk of accidental loss always exists due to power failures or file system errors, so creating a backup copy before any update is a mandatory rule.
Why is the update button gray and not clickable?
This may mean that there are no updates for your region and firmware version yet, or the servers are temporarily unavailable. Also check for free memory space. Try changing the region in the settings or clearing the cache of the Update application.
What is stable and weekly firmware?
Stable firmware is fully tested and is recommended for ordinary users. Weekly/Beta contains new features, but may have bugs and unstable operation. For Redmi 9T, it is recommended to use only stable versions.
Do you need to unlock the bootloader to update over the air?
No, you do not need to unlock the bootloader to install official updates via OTA or the Recovery menu. It is needed only for installing custom firmware, obtaining superuser rights (Root) or firmware via Fastboot with complete data clearing.