How to turn off Xiaomi Mi 9T: all methods

Smartphones Xiaomi Mi 9T series and their modifications, known in the global market as Redmi K20, are equipped with a unique power management mechanism that can cause confusion among users who are first encountering the shell MIUI. The traditional lock button here acts as a fingerprint scanner and is located on the screen, not on the side, which changes the usual logic of interaction with the device. Understanding how to properly terminate the gadget is necessary not only to save battery power, but also for preventive measures, such as forced reboot when hanging.

In this detailed guide, we will look at all the existing ways to turn off power, from standard software methods to hardware button combinations for emergencies. We will also touch on the topic of button settings, since in newer versions of firmware, the functionality of side keys can be expanded or changed. Careful study of these instructions will help you avoid panic in situations where the device stops responding to touch, and will allow you to correctly manage the power consumption of your device.

It’s worth noting that getting Android operating system shut down correctly is an important part of keeping the file system healthy and battery life. Wrong actions, such as completely draining or chaotic keystrokes, can lead to software errors that require more complex intervention, so it’s important to know the algorithm for routine shutdowns and know how it differs from reboot or reset mode.

Staff shutdown through the software menu

The most common and safest way to shut down a smartphone is to use the built-in operating system interface. Unlike many other manufacturers, Xiaomi has set the behavior of the volume and power buttons by default so that a short press of the side key calls the voice assistant, not the shutdown menu. To access power management, you will need to perform a sequence of actions that may seem unobvious the first time.

You need to press the side button on/lock and hold it for a few seconds. Usually, a 3-5 second interval is enough, after which the system menu with large icons will appear on the display. Here you will see two main options: "Stop" (red icon with crossed circle) and "Reset" (blue icon with arrows).

If a standard long-press does not call the menu, you may have Quick Start mode activated in the system settings. In this case, a short press opens the Google Assistant or Mi AI, and a long one may not work properly without setting up. In such situations, you can use an alternative way through the notification bar. Swipe from top to bottom to open the “curtain”, and find the power icon, which is often located in the upper or lower corner of the Quick Settings panel.

It's important to understand that the shutdown process takes a while, especially if there are a lot of heavy applications on the device. The system must have time to save data and stop services. SIM-maps, as this can cause damage to system files.

Use of the side button and behavior settings

The physical button on the right side of the Xiaomi Mi 9T is the only hardware power control, as the fingerprint scanner is integrated directly into the display. By default, in global firmware versions, a short press of this button activates the voice assistant, which often annoys users who are used to instant screen locking. Fortunately, this logic can be changed in the system settings, returning classic behavior.

To change the function of the button, go to the Settings menu, then select the Additional section and find the Power button. Here you will be asked to select an action for a short press: "Google Assistant" or "Nothing." If you choose "Nothing", a short press will simply lock or unlock the screen, which is the most common scenario for most smartphone owners.

⚠️ Note: After updating the operating system MIUI It is recommended to check this parameter after each major software update, so as not to encounter an unexpected start of the voice assistant instead of turning off the screen.

Long pressing of the power button, as mentioned earlier, is responsible for calling the shutdown menu. However, in some custom firmware or when installing third-party launchers, this interval may vary.9 If you installed power management applications, they can also intercept events from the power button. In such cases, the standard algorithm may not work correctly, and you will need to remove the conflicting software.

Also worth mentioning is the Pocket Mode feature, which prevents the screen from accidentally turning on in your pocket.This feature uses a proximity sensor and an accelerometer. If your phone doesn't respond to the on button press, it may be that the sensor is closed with a low-quality protective glass or a cover covering the top of the screen.

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If a short press of a button calls Google Assistant and you just need to turn off the screen, use the swipe down to open the curtain and press the lock icon there until you change the settings in the menu.

Emergency restart when the system freezes

Situations where the touch screen stops responding to touch and the interface freezes completely occur even on powerful devices such as the Xiaomi Mi 9T. This can be caused by a lack of RAM, a malfunction of a particular application or a critical system error. In such cases, software shutdown through the menu becomes impossible, and the use of the method of “hard” or forced reboot is required.

To do this, you need to press the power button and hold it for much longer than usual. The retention time can be 10 to 20 seconds. The device at this point will ignore all other commands and force the components to shut down, then automatically start again. The screen will go out, and in a few seconds the Mi or Android logo will appear.

If a single-button combination doesn't work, which sometimes happens when touchscreen or display drivers freeze deep, you can try a button combination. Press both the on and Volume Up buttons. Hold them for about 15 seconds. This combination is often used to enter Recovery mode, but with prolonged retention, it can also initiate a power reset.

• 🔋 Long-term retention of the power button (15-20 Seconds: The main method of forced restart.
• 📱 Power combination + Volume Up is an alternative way to do this if the first button does not respond.
• 🔌 Connecting to a charger can sometimes “wake up” the power controller and allow a reboot to be performed.

After a successful forced reboot, it is recommended to analyze which application was launched before freezing. Often the cause is "heavy" games or unoptimized software. Cleaning the cache of a problematic application or deleting it can prevent a recurrence of the situation in the future.

Resetting settings via Recovery Mode

In cases where the software failure is so critical that the device cannot boot the operating system even after rebooting, or if you forget the pattern lock, you may need to enter Recovery Mode. This mode allows you to reset to factory settings (Wipe Data), which completely delete all user data, but return the phone to life.

To enter this mode, you need to turn off the phone (if it turns on) or wait for the discharge, then press the combination of the Volume Up and Power buttons. Hold them until the Mi logo appears, then release the power button, but continue to hold the volume button until the Main Menu menu appears.

In the Recovery menu, select Wipe Data, then confirm the action by selecting Wipe All Data. The system will warn you of the irreversibility of the process. Once confirmed, the data partition will begin to be formatted. This process can take several minutes. Once completed, select Back to Main Menu and then Reboot -> Reboot to System.

⚠️ Note: Recovery Mode resets absolutely all data, including photos, contacts and messages, if they were not synced with the Mi Cloud or Google cloud.

Once reset, the phone will require you to enter a Google account that was previously synced to the device.This is an FRP (Factory Reset Protection) security measure that protects stolen phones from being used by unauthorized persons.

Disconnection problems and their solution

Sometimes users are faced with a paradoxical situation: the phone does not turn off through the menu, buttons, or turns off and immediately turns on again. This behavior, called "bootloop" or cyclic reboot, often indicates a software conflict or hardware button malfunction. If the power button is physically stuck or damaged, it can constantly send a signal to turn on.

Check if the button is stuck in the case. Carefully press it several times, it may just get dirty. If the button is all right, the problem may be in a third-party application that has power management permission or wakes up the device. Try to start the phone in safe mode. To do this, when you turn on when the Mi logo appears, press the volume button.

In Safe Mode, only system applications load. If the phone is turned off correctly, it means that third-party software is to blame. Start removing recently installed programs or applications that have deep access to the system (memory cleanups, antiviruses, launchers), and exclusion diagnostics is the most effective way to find the culprit.

• 🔍 Check the physical condition of the power button for sticking.
• 🛡️ Run Safe Mode to Eliminate Third-Party Applications.
• 📉 Remove Optimizer Apps and Task Killers that Could Conflict with the System.

Also, the cause of cycling can be a faulty battery or a bloated battery that puts pressure on the plumes inside the case. If the phone turns off on its own when charging more than 20% or warms up in the area of the camera, this can be a sign of hardware breakdown, requiring a visit to the service center.

Energy saving and automatic shutdown

To extend the life of the battery on long trips or when storing the device, it is useful to use the function of planned on and off. Xiaomi Mi 9T allows you to set up automatic shutdown and turn on on on schedule. This eliminates the need to keep the phone on around the clock, which reduces battery wear and the number of charging cycles.

You can find this feature by Settings -> Battery and Performance (or simply Battery) -> Battery (icon at the top right) -> Scheduled on/off. You can set the time to turn on and off, and also select the days of the week. For example, you can set the phone to turn off for the night from 23:00 to 07:00.

Using this feature is especially relevant for older batteries, as it reduces the load on the chemical elements during periods when the phone is not in use.In addition, night shutdown ensures that no background processes or updates will disturb your sleep with notifications, even if the “Do not disturb” mode is on.

⚠️ Note: When the phone is off, incoming calls and messages will not arrive until the device is turned on. Make sure that setting the schedule does not conflict with your expectations of availability.

Auto shutdown also helps to reset accumulated system errors and clear RAM daily, a preventative measure that can improve overall smartphone performance in the long run.

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An automatic shutdown schedule is a great way to extend battery life and ensure uninterrupted sleep, but requires getting used to the nighttime unavailability mode.

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