Why you need to reboot and when to use it
Xiaomi Mi 9 is the flagship of 2019 with a Snapdragon 855 processor and 6 GB of RAM, but even such a “stuffing” is not immune to failures. Reboot is a universal tool to solve most software problems, from the hanging interface to application errors. For example, if the Mi 9 suddenly stopped responding to touch, brakes when opening the camera or can not connect to Wi-Fi, the first thing to do is to try a soft restart.
But not all situations are the same. If the smartphone is completely frozen (black screen, no button response), you will need a forced reboot — the so-called "hard reset." It is important to understand the difference: a conventional reboot saves all data and settings, and a hard reset (via Recovery) can erase them. In this article, we will discuss all the current ways to reboot for the Mi 9, including hidden MIUI functions and hardware button combinations.
Method 1: Standard Reboot through the Menu
The safest and most recommended method is to use a built-in shutdown menu, which is suitable if the smartphone responds to touch, but is unstable (for example, applications spontaneously close or errors such as “com.android.phone process stopped”).
Instructions:
- 📱 Press and hold the power button (located on the right side of the Mi 9) for 2-3 seconds.
- 🔄 In the menu that appears, select "Reboot" (or "Restart" in English firmware).
- ⏳ Wait 30–60 seconds – the smartphone will turn off and automatically turn on again.
This method does not delete data or reset settings. If after the reboot the problem persists (for example, the mobile network does not work), try the following methods.
Method 2: Forced reset (hard reset)
If the Mi 9 is completely frozen — no touch response, black screen or Xiaomi logo — a hardware reboot will help, a technique that simulates battery extraction (although it is not removable in the Mi 9) and resets all temporary processes.
How to do this:
- 🔋 Hold the power button and volume button at the same time.
- ⏱️ Hold them for 10-15 seconds until the screen goes out and the smartphone starts to vibrate.
- 🔄 Release the buttons – the device automatically restarts.
Make sure your smartphone is at least 10% charged.
Turn off the charger (if connected)
Do not press other buttons during the process.
Wait at least 2 minutes before trying again-->
⚠️ Note: If the Mi 9 is stuck on the logo again after a hard reset, this may indicate firmware damage).
Method 3: Reboot to Recovery Mode
Recovery Mode is a service menu that lets you reset settings, clear your cache, or install updates manually.Reboot to Recovery is useful if:
- 🔄 The smartphone is cyclically rebooted (the so-called bootloop").
- 📱 You need to clear the partition cache (Dalvik Cache or System Cache).
- 🔧 Reset settings to factory settings (for example, before selling).
How to log in to Recovery:
- 🔋 Turn off your smartphone (if it reacts – via the power menu, if not – hold the power button for 10 seconds).
- 🔕 Press the power button and the volume button at the same time.
- 📱 Release buttons when the Mi logo and Recovery menu appear on the screen.
In the Recovery menu, use the volume buttons for navigation and the power button for selection. To simply restart your smartphone, select "Reboot" → "Reboot to System."
What happens if Recovery does not open?
Method 4: Reboot through ADB (for advanced users)
If you have access to a computer and debugging is enabled USB, You can restart the Mi 9 through the command line, and this is useful when the touch screen is not working, but it's not. USB-port.
Step-by-step:
- 🖥️ Connect your smartphone to your PC through USB-Cable (original or certified).
- 📂 Install. ADB and Fastboot (if not already installed).
- 🐍 Open the command prompt (cmd) and type: Adb devices Make sure your Mi 9 appears in the list of devices.
- 🔄 For a soft reboot, run: adb reboot For a forced reboot (similar to a hard reset): adb reboot bootloader
⚠️ Attention: Teams ADB They require you to pre-set the debugging in the Developer menu, and if you haven't turned it on, it won't work. To activate the debugging, go to Settings. → The phone. → Version. MIUI and click on it 7 times, then go back to Settings → Additionally. → For developers → Debugging by USB.
Method 5: Reboot via Fastboot (in case of critical crashes)
If the Xiaomi Mi 9 doesn’t turn on even after a hard reset or freezes in Fastboot mode, you’ll need to flash it back. This method deletes all data, so use it only as a last resort.
What you need:
- 🖥️ Computer with installed ADB and Fastboot.
- 📁 Official firmware for Mi 9 (download from Xiaomi website).
- 🔌 Original. USB-cable (important for stable connection!).
Instructions:
- 🔋 Turn off your smartphone (if it is on).
- 🔕 Press the power and volume button simultaneously for 10 seconds until the Fastboot screen appears.
- 🖥️ Connect your smartphone to your PC and open the command line in the firmware folder.
- 📝 Enter the commands in turn: fastboot flash boot boot.img fastboot flash recovery recovery.img fastboot flash system system.img fastboot reboot
It takes 5-10 minutes, and when you reboot, it's like a new phone, with stock firmware and no data.
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Before you run through Fastboot, check your Mi 9 model with the fastboot getvar product command. For Mi 9, the answer should be cepheus. If the model is different (like the cepheusin for the Indian version), download the corresponding firmware!
Table: Comparison of resetting methods
| Method | When to use | Are the data stored? | You need a PC? | Difficulty |
|---|---|---|---|---|
| Standard reset. | Minor lags, application errors | ✅ Yes. | ❌ No. | ⭐ |
| Forced (hard reset) | Fully got stuck, black screen. | ✅ Yes. | ❌ No. | ⭐⭐ |
| Recovery Mode | Bootloop, cache cleaning, reset settings | ⚠️ Partially (depending on the action) | ❌ No. | ⭐⭐⭐ |
| ADB | The sensor is not working, but the USB is working. | ✅ Yes. | ✅ Yes. | ⭐⭐⭐ |
| Fastboot | Critical firmware failures, brick | ❌ No. | ✅ Yes. | ⭐⭐⭐⭐ |
Frequent Mistakes and How to Avoid Them
Many users make common mistakes when rebooting the Xiaomi Mi 9, which can make the problem worse.
- 🔋 Battery discharge: If the charge is below 5%, the smartphone may not turn on after the hard reset.Always check the charge level or plug the charge before rebooting.
- 🔌 Non-original cable: When you run through Fastboot, cheap cables can interrupt the connection. Use only certified accessories.
- 📁 Install firmware from another model (for example, from Mi 9) SE) Always check the code name of the device (cepheus for Mi 9).
- ⏱️ Interrupting the process: If you interrupt the firmware through Fastboot or clear the cache in Recovery, the smartphone may stop turning on.
⚠️ Note: If the Mi 9 is not correct after the reboot, it will be called "This". MIUI "version cannot be installed on this device" means you're trying to install firmware not for your regional version. For example, global firmware is not suitable for the Chinese Mi 9 model (and vice versa). Download the correct version from the official website or use the XiaomiTool tool to automatically determine the model.
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If the smartphone does not turn on after any manipulations, check it for hardware damage (for example, a bloated battery or a damaged screen plume), in which case repair is required at the service center.