Owners of Xiaomi smartphones, including the popular Redmi 4X model, sooner or later encounter a screen that depicts a bunny fixing a robot, or the inscription Fastboot. Many users are scared of this condition, thinking that the device has failed, but this is not the case. Fastboot is a special diagnostic mode built into the Android operating system, which allows you to perform low-level manipulations with the device.
Unlike normal operating mode, the MIUI graphics shell does not run, and the phone waits for commands from the computer or user actions through buttons, a state necessary to restore the system after critical errors, install a new firmware or gain superuser rights, understanding how this tool works will save your nerves and time while maintaining the gadget.
What is the Fastboot mode?
Fastboot is a protocol developed by Google to interact with the Android device bootloader via a Google-based platform. USB-Connection. Xiaomi Redmi. 4X This mode serves as a bridge between the computer and the phone's internal memory, allowing you to write data directly, bypassing the limitations of the operating system.
Unlike Recovery, which has its own navigation menu, Fastboot is usually managed by commands with a PC or special button combinations on the device itself. It is through this interface that the bootloader is often unlocked, which is a prerequisite for installing custom firmware. Without understanding the operation of this mode, deep customization of the Redmi 4X is impossible.
It is important to note that being in this mode does not mean that the phone consumes minimal amount of power and waits. However, being in this state for a long time without connecting to the charger can drain the battery, although modern power controllers Xiaomi usually take care of the charge.
💡
In Fastboot mode, the screen may not go out to save energy, so it’s best to connect your phone to a power source if you plan to work with it for a long time.
How to Get Fastboot Mode on Redmi 4X
There are several ways to put Redmi 4X in a command standby state, and the most common and safe method is to use physical buttons, which requires you to turn off your smartphone completely, then press both the Volume Down and the power button.
Hold both keys until the image with the hare or the Fastboot logo appears on the screen. Once you see this picture, the buttons can be released. If you accidentally enter this mode, just press the power button for 10-15 seconds until the device vibrates and reboots in normal mode.
The second way is to use software like ADB (Android Debug Bridge), and if you have USB debugging enabled on your phone, you can send a command from your computer, which is convenient if the volume buttons are stuck or damaged, and the command is as follows:
adb reboot bootloaderThe third option is to use special bootloader management applications that require root rights, but for the Redmi 4X, mechanical input is the most reliable and quickest way, and the main thing is not to panic when you see an unusual screen, since this is a regular feature of the device.
☑️ Check before entering the Fastboot
What is Fastboot used for on Xiaomi?
The main purpose of this mode is to modify the partitions of the device memory, which Xiaomi users most often use to firmware the phone through the computer using the MiFlash utility, which allows you to return the device to a factory state if a software failure led to an endless restart (bootloop).
In addition, the Fastboot unlocks the bootloader. Officially unlocking requires permission from Xiaomi and waiting for a certain period of time. Without the unlocked bootloader, installing third-party operating systems such as LineageOS or Pixel Experience is impossible.
The regime is also used to:
- 🔧 Reset passwords and graphic keys (requires an unlocked bootloader).
- 🔄 Reverse Android version to earlier (Downgrade).
- 🛠 Recovery of damaged system partitions (boot, recovery, system).
- 📱 Removal of Unremovable System Garbage (Bloatware).
Can the virus be removed via Fastboot?
How to Get Out of Fastboot Mode
If your Redmi 4X is stuck in this mode and doesn't respond to normal actions, there are several ways to exit, the easiest and most effective way is to force a reboot, which requires you to press the power button and hold it for a long time, usually 10 to 20 seconds.
The phone should vibrate, the screen will go out, and once the Mi logo appears, the button can be released. In some cases, if the system is damaged, the device may try to log in to the Fastboot again. Then you will need to flash it. If the power button does not work, you can wait for the battery to completely discharge, but this is not recommended often.
There is also a software method for exiting the computer if the drivers are installed correctly. In the command line, you need to enter the command command from the SDK Platform-tools folder:
fastboot rebootThis command forces the device to restart to normal mode, and if none of the methods work, it may be a hardware problem, like a stuck volume button that constantly sends a signal to enter diagnostic mode.
💡
Long-term retention of the power button (15+ seconds) is a universal way to exit the Fastboot if software methods are not available.
Redmi 4X Firmware via Fastboot
Redmi's recovery process 4X Fastboot is one of the most reliable methods of treating software errors. For this, you will need a computer running Windows, USB-cable and official Fastboot firmware (extension.tgz, unlike Recovery firmware.zip). First you need to download and install the drivers Xiaomi USB Driver and MiFlash utility.
After connecting the phone in Fastboot mode to the PC, a device called the Android Bootloader Interface should appear in the Device Manager. If unknown devices are displayed instead, the drivers are installed incorrectly, then the MiFlash program selects the path to the unpacked firmware and the Flash button.
It is important to choose the correct firmware method at the bottom of the utility window:
- 🗑 Clean all – complete data cleanup (recommended in case of failures).
- 💾 Save user data - saving data (may cause errors when changing the region).
- 🔓 Clean all and lock – cleaning and locking the bootloader (dangerous when changing the firmware region!).
It takes 300 to 600 seconds. Under no circumstances disconnect the cable at this time. Once complete, the phone will automatically restart. The first boot can last up to 10 minutes.
| Parameter | Fastboot ROM | Recovery ROM |
|---|---|---|
| File extension | .tgz (archive) | .zip (archive) |
| Method of installation | Through PC (MiFlash) | Through the Update Menu or Recovery |
| Clearing the data | Mandatory (usually) | Optionally. |
| Change of region | Possible (Global) ↔ CN) | Only within the region |
Typical errors and their solution
When working with Fastboot on Redmi 4X, users often encounter a “Missmatching image and device” error. This means that you are trying to flash firmware that is not intended for your model. For example, the firmware for Redmi 4 Prime will not work for the regular Redmi 4X (codename santoni).
Another common problem is the “Anti-rollback check failed” error, which is Xiaomi’s security mechanism that prevents you from rolling back to a lower version of Android than the one installed on your device if you have updated your rollback protection index.
⚠️ Warning: If you see an anti-rollback error, stop the firmware immediately. Continuing the process may make it impossible to restore the phone without soldering the programmer.
It's also common to have a problem where the computer doesn't see the phone in Fastboot mode. In this case, try another one. USB-Connect the device directly to the motherboard port, avoiding USB-Sometimes it helps to install drivers manually through the Device Manager, choosing the model Xiaomi Android Bootloader.