The Xiaomi Mi 9, released in 2019, is still a popular device thanks to its powerful Snapdragon 855 processor and quality camera. However, over time, the Android operating system and the MIUI shell can accumulate software bugs, app cache and system debris, leading to slowdowns or unexpected reboots.
In such situations, the most effective solution is a complete return to the original state, known as Hard Reset, which completely clears the device’s internal memory of user data, returning the software to the state in which it was immediately after leaving the factory assembly line.
Before you take action, you need to be clear about the consequences of this step: resetting is an irreversible process of deleting information, so preparation plays a crucial role in the safety of your personal photos, contacts and documents.
There are several scenarios in which Xiaomi Mi 9 owners may need to perform a complete system reset, most often when the device starts to work unstable, often freezes or stops responding to interface commands.
Another common reason is to prepare your gadget for sale or transfer to another person, in which case it is important not just to delete files, but to clean the memory sections so that the new owner can not recover your personal data with special software.
The procedure is also necessary if you forget your pattern lock, digital pin or screen unlock password. Although modern versions of MIUI have enhanced protection, resetting via Recovery mode is often the only way to access the system.
The most important step before you start any manipulation of system files is to back up your data, and without that, you risk losing valuable photos, messengers, and phone book entries.
Xiaomi Mi 9 owners can use the built-in cloud backup tool. To do this, go to Settings → Mi Account → Xiaomi Cloud and select Sync. Make sure the switches opposite contacts, messages and notes are activated, and then click Sync.
For a more complete copy, including photos and videos, it is recommended to use the service Google Photos or third-party cloud storage. USB-cable DCIM, Download and Documents on your PC hard drive.
⚠️ Warning: Make sure your Xiaomi Mi battery is charged 9 is 60-70%. Interrupting the reset process due to battery discharge can damage system partitions and inability to load the device.
☑️ Preparation for the reset of Xiaomi Mi 9
Understanding the differences between the types of resets will help you choose the right strategy for restoring your smartphone to health. Not all methods are equivalent in depth cleaning and the required actions on the part of the user.
Soft Reset, or Soft Reset, is a normal device reboot that doesn’t delete user data, but only updates RAM and closes background processes, often solving minor freeze problems.
Hard Reset, or Hard Reset, involves completely erasing the /data partition in internal memory, which is a method we will discuss in detail, as it returns the Xiaomi Mi 9 to a “store-like” state.
Below is a comparison table that will help you determine the type of intervention in the operation of your device.
| Parameter | Soft discharge (Reset) | Hard Reset (Hard Reset) | Resetting network settings |
|---|---|---|---|
| Data retention | Complete. | Complete removal | File and photo retention |
| Impact on the system | Cleaning up RAM | Cleaning internal memory | Resetting Wi-Fi and Bluetooth |
| Implementation time | 1-2 minutes | 5-10 minutes | 30-60 seconds. |
| When to apply | Light lags. | When selling or making critical mistakes | When it comes to Internet problems |
The easiest and safest way to bring the Xiaomi Mi 9 back to factory settings is to use the standard operating system settings menu, a method recommended for all users, as it is controlled by software-based security algorithms.
To start, open the Settings app and scroll down to the very bottom of the About Phone item. In the menu that opens, find the Resets section, which is usually located at the bottom of the screen.
The system will offer several options: reset your Wi-Fi, mobile Internet and Bluetooth settings, or completely delete all data. Select the option to erase all data (reset to factory settings), and a warning will appear on the screen that all files, accounts and applications will be deleted.
Once confirmed, the system can request a screen unlock password or password from the Mi Account to verify the identity of the owner, a FRP (Factory Reset Protection) security mechanism that prevents the device from being stolen.
⚠️ Note: If the device has enabled the “Find the device” function, after resetting the smartphone will require you to enter a login and password from the Google account that was synced earlier.
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Before resetting through the settings menu, perform forced synchronization of contacts with the Google account so as not to lose phone numbers.
If you can't access the settings menu because of a system freeze or a forgotten lock password, you'll need to use Recovery Recovery mode, which works at a low level and doesn't require you to log in.
First, turn off the Xiaomi Mi 9 completely. Then simultaneously press and hold the Volume Up and Power buttons. Hold them until the Mi logo appears, then release the power button, but continue to keep the volume until the Recovery menu appears.
In this mode, the touch screen is not working, so the navigation is done with volume buttons (up/down), and the choice is confirmed by the power button. You need to find the Wipe Data item and select it.
Then select the Wipe All Data option and confirm the action by selecting Confirm. The system will start the formatting process, which can take a few minutes, and the Data wiped successfully message will appear when completed.
What to do if you have a Recovery menu in Chinese?
Once the reset procedure is successfully completed, the device will automatically restart.The first launch of the Xiaomi Mi 9 after Hard Reset takes significantly longer than usual - from 5 to 10 minutes.
The screen may display the Mi or Android logo, as well as the boot indicator. Do not try to interrupt this process or turn off the phone, as this is the moment when system files are configured and new partitions are created.
When the initial setup is complete, you will see a language selection welcome screen, followed by a Wi-Fi connection and a check of device activation via Google and Xiaomi servers.
If you have previously entered a Mi Account on your phone, the system will require authorization, a standard theft protection procedure that can’t be avoided by simply resetting your settings.
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The first start after a reset is a critical point: wait for the full desktop load before you start installing applications or transferring data.
Once you have successfully set up your smartphone, it is important to do a series of things to optimize it. The new system will work quickly, but it needs the right initial configuration.
First, check for operating system updates. Go to Settings → About Phone → System Update. Xiaomi engineers regularly release security patches and stability improvements that may not be available in the factory firmware.
Then restore the data from a previously created backup. If you used a cloud service, just log in to your account, and contacts, notes, and calendar are synchronized automatically. Photos and apps can be restored through Google Play and Google Photos.
It is also recommended to reconfigure biometric protection: fingerprints and facial recognition. Old biometric data is deleted when reset for security reasons, so it must be re-registered in the Passwords and Security menu.