How to remove firmware from Xiaomi: a complete guide

Many smartphone users Xiaomi are wondering how to remove the firmware from the device. This usually means the desire to completely clear the system partition, return the gadget to a “bricked” state for subsequent flashing, or simply erase all data before selling it. It is important to immediately understand: remove the operating system it is impossible to completely and leave the phone without software in normal operation mode, since the device will no longer function as a smartphone.

The process of erasing the current version MIUI or HyperOS most often is a preparatory step for installing a custom build or a pure global version. Interfering with the structure of memory partitions requires a deep understanding of the architecture Android. Any incorrect actions may make it impossible to boot the device, so before starting any manipulations you need to weigh all the risks.

In this guide we will look at safe cleaning methods, using the engineering menu Fastboot and working with debugging tools. You will learn how a simple reset differs from formatting system partitions and what consequences a complete memory clearing has for further operation of the gadget.

Understanding the structure of Android memory and partitions

Before you start deleting data, you need to figure out where exactly the firmware is stored. The smartphone memory Xiaomi is divided into several logical parts called partitions. The main partition, where the operating system resides, is usually called system. It is its contents that users often want to erase. However, there are critical partitions nearby, such as boot (bootloader) and recovery (recovery mode).

If you decide to delete the partition system, the phone will lose the user interface, applications and system libraries. In this case, the bootloader will remain intact, which theoretically allows you to load a new firmware image via a computer. However, deleting a partition boot or damaging the bootloader Bootloader will lead to the fact that the device will not be able to start even in recovery mode without external intervention.

⚠️ Attention: Full formatting of the partition system or userdata makes data recovery impossible using standard methods. Make sure you have an up-to-date backup of important information on external storage or in the cloud.

Modern devices use a file system ext4 or f2fs to store data. Understanding that firmware is not one file, but a set of partition images helps to avoid fatal errors. When you remove the firmware, you actually clear the address space allocated for system files, leaving only the basic firmware.

Preparing the device for the cleaning procedure

Any manipulations with system partitions require careful preparation. The first step should always be to create a full backup. Built-in tools MIUI allow you to save contacts, messages and settings, but for a complete copy of the system it is better to use third-party tools or manually transfer files to a PC.

The second critical stage is unlocking the bootloader. Bootloader. Without an unlocked bootloader, you will not be able to gain superuser rights (Root) or download the custom recovery needed for deep cleaning. Official unlocking through the utility Mi Unlock takes from 7 to 168 hours of waiting after linking the account.

It is also necessary to ensure a stable connection to the computer. Use an original USB cable, as cheap analogues may not provide sufficient current or data transfer speed, which will lead to a loss of communication at a critical moment. The battery charge should be at least 60%.

• 📱 Back up all important data to an external drive.
• 🔓 Unlock the bootloader through the official Mi Unlock utility.
• 🔌 Use the original USB cable to connect to the PC.
• 🔋 Charge the device to at least 60-70%.

Reset method via Recovery Mode (Wipe Data)

The safest way to “delete” the current state of the system, while maintaining the ability to boot into factory mode, is to use Recovery Mode. This method does not completely delete the firmware file itself from memory in the sense of formatting the partition, but it erases all user data and settings, returning the phone to its factory state.

To enter recovery mode, you must turn off the smartphone and hold down the key combination. On most devices Xiaomi this is the volume up button (Volume Up) and the power button. Hold them simultaneously until the logo Mi or menu appears Recovery.

In the menu, navigation is carried out with the volume buttons, and selection is done with the power button. You need to select the item Wipe Data, then confirm the action. There is an option Wipe All Datathat performs a complete cleanup. After the process is completed, select Reboot.

⚠️ Attention: After resetting via Recovery on devices with Mi Cloud protection enabled, you may be required to enter the login and password for the Mi account that was previously synchronized. Forgetting this data means getting a locked phone.

Using Fastboot to format partitions

A more advanced method that allows you to directly work with memory partitions is the Fastbootmode. In this mode, the phone connects to the computer and waits for commands. To work, you will need an installed set of drivers ADB/Fastboot and platform SDK Tools on your PC.

To switch to Fastboot mode, turn off the phone and hold down the volume down button (Volume Down) together with the power button. An image of a hare repairing an android or an inscription FASTBOOTwill appear on the screen. Connect the device to the computer and open the command line in the tools folder.

To remove the firmware (clean up the system partition), use the format command. However, be careful: the command fastboot erase system will delete the system partition. The phone will stop booting normally and will reboot cyclically or freeze in Fastboot until you upload a new firmware image.

fastboot erase system
fastboot erase userdata
fastboot erase cache

This method is often used when moving from one version of Android to another or when changing the firmware region (for example, from CN to Global), when a clean installation without residual files is required. After executing the commands, the device will be “empty” and will require installation of new firmware via the same Fastboot or Recovery.

Cleaning via ADB Shell commands

If you have access to USB debugging (USB Debugging) and superuser rights, you can use the commands ADB Shell. This method allows you to delete files and folders directly from a running system or from TWRP recovery mode. Commands are executed through the terminal on the computer.

First, you need to make sure that the device is visible in the system. Enter the command adb devices. If the device is visible, you can proceed to shell commands. To remove system applications or files, use the command rm, but to delete entire partitions, root access and knowledge of the file system are required.

An example of a command for clearing the Dalvik cache, which often accumulates errors:

adb shell rm -rf /data/dalvik-cache

Using ADB allows you to specifically remove firmware components, which can be useful for “lightening up” the system (debloating). However, deleting critical system libraries via rm can lead to unstable operation or bootloop (cyclic reboot).

What is Bootloop?

Bootloop is a state where the smartphone endlessly reboots before reaching the desktop. Often occurs after deleting system files or unsuccessful firmware.

Comparison of cleaning methods and their risks

The choice of method depends on your ultimate goal. If you just want to sell the phone, a standard reset is enough. If you are an enthusiast who changes firmware, you will need Fastboot and ADB. Below is a table comparing the main characteristics of the methods.

Method	Complexity	Risk of data loss	PC required
Recovery Mode	Low	Full	No
Fastboot Erase	High	Full + System	Yes
ADB Shell	Medium	Selective/Full	Yes
Mi Flash Tool	Average	Full (Clean Up)	Yes

The most dangerous method is working through Fastboot with the erase command, since it does not ask for confirmation a second time and instantly destroys data on the specified partition. An error in the partition name (for example, mixing up system and modem) can make the phone unusable without a programmer.

Restoring the system after removing the firmware

If you have successfully removed the firmware, you will be faced with the task of installing a new one. For devices Xiaomi the standard is to use official images in the format .zip (for Recovery) or .tgz (for Fastboot). You can download them from official resources or trusted forums.

The recovery process usually begins with downloading the required firmware file. If you used Fastboot for cleaning, then you need to flash it through Fastboot. The utility Mi Flash will automatically detect the device port and allow you to select the firmware mode. Mode Clean all is preferable after removing the old system.

⚠️ Attention: app interfaces and recovery menus may differ depending on the version of MIUI/HyperOS and the smartphone model. Always check the latest instructions for your specific model on official resources or specialized forums before proceeding.

After the installation process is completed, the phone will reboot. The first boot may take up to 10-15 minutes as the system optimizes applications and creates new caches. Do not interrupt this process and wait until the welcome screen appears.

Is it possible to remove the firmware without a computer?

It is impossible to completely delete the system partition without a computer, since this requires higher-level access rights, which are only available in Fastboot modes or via ADB. Using only the buttons on the case, you can only perform a reset to factory settings (Wipe Data), which is not a complete removal of the firmware.

What happens if you delete the Boot partition?

Deleting the partition boot will lead to the fact that the phone will stop booting at all. The screen will be black, or the device will immediately go into Emergency Download (EDL) mode, requiring special hardware or an authorized account for recovery.

How to enter Fastboot mode if the buttons do not work?

If the buttons are faulty, you can try using the command adb reboot bootloader from a running system or through a computer if USB debugging is enabled. There are also special switch applications that require root access.

Will the warranty be reset after removing the firmware?

Removing the firmware or resetting the settings itself does not void the warranty. However, if hardware components are damaged in the process or if the bootloader is found to be unlocked (which is often required for deep cleaning), the service center may refuse free repair.