How to turn off Xiaomi Mi 9: step-by-step methods and solutions

Smartphone Xiaomi Mi 9, released in 2019, is still a popular device thanks to its powerful processor Snapdragon 855 and high-quality AMOLED-However, like any complex electronics, the device can experience software freezes, overheating or interface failures. MIUI, Users often search for answers to questions about how to properly shut down the system, especially when the touch screen stops responding to touch.

In this article, we will take a look at all the existing ways to turn off the Mi 9, from standard procedures to emergency reset methods that will help resuscitate the device in a critical situation. We will also look at the nuances of the Android operating system on the shell of MIUI, which distinguish this process from the usual algorithms of other brands. Understanding these mechanisms will allow you to safely manage the power of the gadget without the risk of data loss.

There are several scenarios in which knowledge of the switch-off algorithms becomes critical: from banal substitution to the clichéd. SIM-The forced reboot through a button combination does not delete user data, unlike Factory Reset. It is important to distinguish these concepts so that you do not accidentally erase all information from the phone, trying to just turn off the screen.

Standard method of shutting down via interface

The most common and safe way to complete the Xiaomi Mi 9 is to use the regular system menu. This requires unlocking the device and calling the control panel. Depending on the settings of your version of MIUI, this can be done by swiping down from the top of the screen or pressing the virtual menu button. The quick settings list usually includes a power icon, often combined with a brightness slider.

If you prefer the classic method, there's a physical power button on the side of the smartphone. A short tap on it (about one second) triggers a lock menu, which also has off options. MIUI offers three basic actions: turn off, reset and, in some versions, flight mode. Selecting "off" initiates a standard procedure for closing all background processes.

Once you have selected the appropriate action, the screen will be confirmed, and the system will ask you to confirm your intention again to avoid random actions. This is an important security feature built into Android. Once confirmed, the screen goes out, and after a few seconds the device completely shuts down, as may be evidenced by a vibration response or the disappearance of indicators.

It's worth noting that newer versions of the shell may have slightly different interfaces. Sometimes the option to turn off is hidden in the menu caused by a long press of the power button if the settings activate the "Accelerated Launch" mode of applications. In this case, a short tap immediately opens the application, not the power menu. To return the standard behavior, you need to go to Settings → Additional settings → Buttons and change the assignment of the short press.

Forced reset when getting stuck

Situations where the touch layer of Xiaomi Mi 9 stops responding to commands and the system does not respond to touch are not so rare, this can be caused by overheating of the processor, lack of RAM or a critical error of the system process. In such cases, the standard menu is not available, and the application of the method of hard reset or Hard Reset power is required.

To do this, you need to hold the power button on the side of the device, hold it for a long time, 10 to 20 seconds, the screen can go out and light up again, Mi or Android logos may appear, and your job is to keep the button on until the device vibrates and starts the process of booting the system again.

⚠️ Warning: Do not use the forced reboot method regularly to turn off your phone. Frequent system interruption without properly completing processes can damage cache files or system logs.

This technique simulates battery extraction, which in modern non-removable battery monoblocks is the only way to hardware reset the power controller. If nothing happens after 20 seconds of holding the button, try a combination of power buttons and volume increase. Hold them simultaneously for 15-30 seconds. This bundle is often used to enter Recovery mode, but on some firmware versions it also initiates a reboot.

It's important to understand the difference between shutting down and restarting in the context of recovery. If your goal is to just turn off your phone and it's stuck, you'll still have to do a routine shutdown procedure through the menu after a forced reboot if the device bounces back, but if you need it urgently, rebooting often solves the problem faster than trying to turn it off and then switch on long enough.

Use of Engineering Menu and ADB

For advanced users who do not have a power button or sensor, there are software methods to turn off the Xiaomi Mi 9. One of them is the use of debugging over USB and the tools of ADB (Android Debug Bridge), which requires connecting the smartphone to the computer and the presence of installed drivers.

First, you need to activate Developer Mode. Go to Settings → About Phone and press 7 times on "MIUI Version." Then the "Additional" or "Extended Settings" menu will show "Developers" option. Inside you need to activate the "Debug USB" switch. After connecting to the PC and logging in on the phone screen, you can execute a command.

adb shell reboot -p

This command sends a signal to the system to immediately turn off the power. Alternatively, you can use the command adb shell am start. -a android.intent.action.REQUEST_SHUTDOWN, If the sensor is not working, the first one with the flag -p It is preferable because it does not require interaction with the screen.

Another software method is to use assistive apps that place a shutdown widget on the desktop, and utilities like Quick Boot or analogues require root rights to fully operate the shutdown function, and without superuser rights, they can only emulate button presses or suggest switching to the settings menu, which is useless with a hung sensor.

Shutting down through Recovery mode

Recovery Mode or Recovery Mode is a separate minimalist interface that is loaded from the internal memory partition of the smartphone, regardless of the main operating system. You can get into it on the Xiaomi Mi 9 when the phone is turned off, holding the power and volume buttons simultaneously (+). If the phone is on and getting stuck, first perform a forced reboot and when the Mi logo appears, quickly press the button combination.

In the Recovery menu, you have volume buttons (up and down) and you have a power button to choose from. The navigation is textual and simple. Although the main purpose of this section is to reset or flash, there's also an option to turn off. In the menu list, which can be in English or Chinese, you need to find the Power off item.

Using Recovery mode to turn off is only advisable if other methods do not work and the phone is cyclically restarted (bootloop). In a normal situation, this is an unnecessarily complicated procedure. When selecting Power off, the device will immediately stop powering the main nodes.

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If the Recovery menu is in Chinese, follow the icons or order of items. Usually, the "Power off" is at the bottom of the list or has an icon of the socket/button turned off.

Solving the power button problems

A common reason you can't turn off the Xiaomi Mi 9 is because the power button is physically malfunctioning. Mechanical wear, moisture, or dust can cause the contact to stop closing, so software is the only way out, but if the phone is already off, it's going to be extremely difficult to turn it on without a button.

There is a way to turn on by connecting to a charger or computer, and some versions of MIUI allow you to turn on your phone if you connect it to a PC via USB, provided the battery is not fully discharged, and it also helps to connect the original charger with support for fast charging Quick Charge or Power Delivery.

To temporarily solve the button problem, you can use software crutches, such as setting up a timetable for on and off. The Settings menu → Battery and Performance → Battery (the path may vary in different versions) has a "Planned Tasks" item. Here you can set the time to automatically turn off and on the phone, which will allow you to "turn off" the phone at night without the need of a physical button.

⚠️ Attention: If the power button is stalled or pressed with difficulty, do not put excessive effort.This can damage the button plume or get debris deeper inside the case, which will require dismantling the smartphone.

As a last resort, if the button doesn't work at all and the phone needs to be turned off, you can wait for the battery to run out completely. However, the deep discharge of lithium polymer batteries is harmful to their life. So you'd better use an ADB command or an on-screen widget if the sensor is still functional. For a long-term solution, the Mi 9 power button problem can be solved by replacing the plume at the service center, which is a standard and inexpensive procedure.

Features of MIUI and memory optimization

The MIUI shell on the Xiaomi Mi 9 has its own power management features. Aggressive memory optimization often closes the background applications itself, which can create the illusion of having to shut down often. However, modern Android smartphones do not require regular shutdowns “for prevention”, as it was with push-button phones.

The system manages the resources of the Snapdragon 855 processor itself. If you notice that the phone has become slower, most often it is enough to just restart the device, rather than keep it off for hours, reboot cleans the RAM and resets temporary files that may have accumulated during operation.

However, a complete shutdown is useful for long-term non-use or before flying, if you do not want to rely on flight mode, and it is also recommended to do this in case of severe overheating of the body when software cooling methods fail, in such cases, turning off gives the device time to cool down and stabilizes the operation of the thermal sensors.

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Regularly restarting (once a week) is more beneficial to MIUI stability than constantly turning off your phone, which prevents the accumulation of errors in RAM.

Users should also be aware of the “Second Space” or guest mode feature, which, if you use these features, may require the user to log out or confirm the user’s password, a security measure that prevents unauthorized access to data when the device is stolen.

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