When a Xiaomi Mi4 smartphone stops responding to power buttons, freezes on the logo or goes into an endless reboot, it is often called a “brick.” This is a common problem faced by enthusiasts experimenting with custom firmware or trying to update system software with unstable methods. However, it is too early to panic: the architecture of the Snapdragon 801 processor allows you to reanimate the device even if the bootloader fails.
Recovery requires carefulness and a clear algorithm of actions. Unlike modern models where the process can be automated, the Mi4 often requires manual intervention through specialized utilities like Fastboot or Recovery. Proper preparation of the workplace and the presence of the original cable are the first steps to success.
In this article, we will discuss all the stages of resuscitation, from the diagnosis of the type of “brick” to complete firmware, you will learn how to install the necessary drivers, choose the right version of the software and avoid fatal errors that can lead to complete failure of the hardware.
Diagnostics of device status and types of locks
Before you start taking action, you need to determine exactly what condition your Xiaomi Mi4 is in. There are several levels of bricking, and the method of treatment depends on it. Soft brick is characterized by the fact that the phone turns on, but can not boot the operating system, stuck on the MI logo or going into a cyclic reboot.
A more complicated case is when the device is only turned on in Fastboot mode or Recovery mode, in which the kernel of the system does not start, but the low-level bootloaders work properly, which is the most favorable scenario, allowing you to restore the phone software methods without disassembling the body.
⚠️ Warning: If the phone is completely dead, doesn't vibrate or react to a PC connection even after a long charge, the problem could be hardware.
The third option is a hard brick, where the device doesn't show any signs of life at all. In the case of the Mi4, it's often helpful to enter Emergency Download (EDL), which allows you to flash the phone even when the bootloader is damaged, and this requires a special combination of buttons or circuit contacts on the board, which is a last resort.
Tool preparation and driver installation
The success of the operation depends on 90% of the quality of the preparation of the software environment. USB-You will need an original or high-quality analogue of the Micro-USB cable, capable of transmitting data, not only charging the battery.
The key is to install the right drivers. To work with Xiaomi Mi4 in bootloader mode, you need Qualcomm HS-USB QDLoader 9008 drivers (for EDL mode) and standard Android Bootloader Interface drivers. Without them, Windows Device Manager will not see the phone in the right mode, and firmware will not start the process.
☑️ Preparations for recovery
You'll also need the Mi Flash Tool, an official software from developers that can work with Qualcomm chipset-based devices, download it only from trusted resources or the official MIUI forum to avoid malicious code, and make sure that the path to the firmware folder is free of Cyrillic characters and spaces.
Enter Fastboot and Recovery Mode
To start the recovery, you have to force the phone to a special mode. If the phone responds to buttons, press the Volume Down volume reduction key and the power button at the same time. Hold them for about 10-15 seconds until the image of a hare in headphones appears on the screen — this is Fastboot mode.
If the system is partially working, you can use a software method. Connect the phone to the PC, open the command line and type in the command:
adb reboot bootloaderThe alternative is to enter Recovery mode. To do this, press Volume Up Volume Volume Up Volume Up Volume Up Volume Up Volume Up and Power Upload, and this menu controls volume buttons, and the choice is confirmed by the Power button, and you can try to reset Wipe Data settings, which often solves the problem of cyclic reboot without completely flashing.
What to do if the Fastboot is not turned on?
The process of firmware through the Mi Flash Tool
This is the main stage of recovery, after unpacking the archive with firmware (it should be in.tgz format and unpacked into the root of the disk, for example, C:\mi4_proSwitch to MiFlash.exe on behalf of the administrator. Press the Refresh button and your device with the serial number should appear in the list.
The most important thing is to choose the firmware method in the lower right corner of the utility. To fully recover from the brick state, choose the Clean all option. It completely erases all data and partitions, installing a clean system. The Clean all and lock option also closes the bootloader, but you should use it with caution: if you are flashing a region other than the global one (for example, CN instead of Global), the phone may lock.
| Parameter | Description | Risk of data loss |
|---|---|---|
| Update | Update without erasure | No. |
| Clean all | Complete cleaning and firmware | Yes (100%) |
| Clean all and lock | Cleaning, firmware and locking | Yes (100%) |
Once you select a firmware file, press the Flash button, which takes 200 to 500 seconds to process. It is strictly forbidden to turn off the USB cable or interrupt the computer while recording memory sectors, this is guaranteed to turn the phone into an irrecoverable brick. Wait for the message "Success" in the status of the device.
Solving Common Recovery Errors
In the recovery process, users often encounter error codes, such as an error. 0x80004005 Often indicates access rights or antivirus issues, try temporarily disabling security software and running Mi Flash on behalf of the administrator. USB-port-line.
If the utility gives a Miss matching image error, it means that you are trying to flash firmware that is not intended for your model or region. Make sure that you downloaded the archive specifically for the Xiaomi Mi4 (cancro), and not for other modifications.
⚠️ Note: The Flash All Except Data Storage error may leave old system files that conflict with the new firmware. If the phone doesn't work after this method, repeat the procedure with the choice "Clean all».
Another common problem is that the phone is defined as «QUSB_BULK» This indicates that Qualcomm drivers are not standing up correctly. Go to Device Manager, find the device with the exclamation mark, select Update Driver, and manually point the path to the Qualcomm driver folder.
💡
Use it. USB-hub without external power or connect the phone directly to the motherboard to avoid a voltage shortage at a critical moment of recording the bootloader.
EDL mode and deep flashing
If the standard Fastboot is not available, the last software method is Emergency Download (EDL) mode. In this mode, the phone is controlled directly by the Qualcomm processor, bypassing Android bootloaders. To enter this mode on the Mi4, you often need to disassemble the body: remove the back cover, turn off the battery, close a special test contact on the board (usually two of them, you need to close one on the mass) and connect USB at the same time.
The Qualcomm HS-USB QDLoader 9008 will appear in Device Manager. In the Mi Flash Tool, select the appropriate port and download the firmware image. This method allows you to recover even a completely “killed” partition of the bootloader. However, an authorized Xiaomi account may be required to use EDL on some versions of the software, since this is the level of service.
Once the firmware is successfully installed in EDL mode, the phone will automatically restart. The first boot can last up to 10-15 minutes, as the system optimizes applications and creates partitions. Don't interrupt this process, even if the screen stays black for a long time.
💡
EDL mode is the “last chance” to revive the phone software, but it requires device disassembly skills and the presence of special Qualcomm drivers.