Fastboot on Xiaomi: how to log in, unlock the bootloader and avoid errors

Fastboot mode on Xiaomi smartphones is a special state of the device that allows you to perform low-level operations: firmware, unlock the bootloader, restore the system or even “resuscitate” the device after serious failures. Without this mode, you can not install custom firmware, obtain root rights or bring back to life the “brick” after a failed update.

However, logging into and working with Fastboot requires caution: one wrong step can lead to data loss, locking the device or even its complete failure. In this article, we will discuss all the current ways to log into Fastboot on Xiaomi in 2026, including models with MIUI 14/15 and HyperOS, and also tell you how to avoid typical errors when unlocking the bootloader and firmware.

If you’ve never worked with Fastboot before, start with the theoretical part, which will help you understand why this mode is needed and the risks it carries.

What is Fastboot and Why You Need It on Xiaomi

Fastboot mode (not to be confused with Recovery Mode!) is a protocol for interaction between a smartphone and a computer at the bootloader level, in which the device does not load the operating system, but waits for commands from the user via ADB (Android Debug Bridge) or special utilities like MiFlash.

The main tasks for which Fastboot is used:

• 🔓 Unlocking the bootloader (bootloader) - a mandatory step before installing custom firmware or obtaining root rights.
• 📥 Firmware via MiFlash or fastboot flash (for example, when recovering from a crash).
• 🛠️ Eliminating critical errors when the smartphone is not loading (so-called soft brick").
• 🔄 Resetting protection (e.g., removal) FRP or Mi Account after purchasing a used device).

It’s important to understand that Fastboot is not the same as Recovery Mode. In Recovery mode, you can reset your settings or install an update through Recovery. ZIP-file, whereas Fastboot gives access to the hardware of the device at a deeper level.

⚠️ Note: On new Xiaomi models (released after the launch) 2022 Unblocking the bootloader via Fastboot can lead to the blocking of the Mi Account on the Internet. 7-30 It's a theft protection, so before you unlock it, link it to your account and wait for confirmation.

Preparing for work with Fastboot: what to do before entering

Before you log in to Fastboot, prepare your device and computer, and skipping these steps can lead to errors like device not found or unauthorized.

What will be required:

• 💻 Windows computer 10/11, macOS or Linux (for fastboot commands).
• 🔌 Original. USB-cable (cheap cables may not transmit data).
• 📱 Charged smartphone (minimum 50% battery to avoid shutdown during the process).
• 🔧 Xiaomi drivers (install automatically when connected or manually via Mi) PC Suite).
• 🛡️ Backup of data (Fastboot operations can erase all data!).

Also check if the bootloader is unlocked on your device.

1. Turn off your smartphone.
2. Press Volume Down + Power before the Mi Bunny logo appears.
3. If you say Unlocked at the bottom of the screen, the bootloader is unlocked. If Locked, you need to unlock.

Important! On HyperOS devices (such as Xiaomi 14 or Redmi Note 13 Pro+), the process of unlocking the bootloader has changed. Now you need confirmation through the Mi Unlock app with a binding to your Mi Account and waiting up to 30 days.

How to log into Fastboot on Xiaomi: step-by-step instructions

There are three main ways to log into Fastboot on Xiaomi smartphones. Choose the right one depending on the state of the device.

Classic method(s)

Suitable for most models, including Redmi, POCO and Xiaomi Mi series.

1. Turn off your smartphone (hold the power button and select Turn off).
2. Press the combination Loudness down + Power and hold for 5-10 seconds.
3. Release the buttons when the Mi Bunny logo appears in the Ushanka cap and the FASTBOOT inscription appears.

2. via ADB (if the device is on)

If the smartphone is working, but you need to go to Fastboot without turning off:

1. Enable USB Debugging in Settings → About Phone → MIUI version (click 7 times, then go back to Additional Settings → For Developers).
2. Connect your smartphone to your PC and confirm your trust in your computer.
3. Open the command line (Win + R → cmd) and type: adb reboot bootloader

3. Forced entry (if the smartphone does not respond)

If the device is getting stuck or not activated:

1. Connect your smartphone to charge for 10 minutes (even if it doesn’t respond).
2. Press Volume Down + Power for 15-20 seconds.
3. If it doesn’t work, try Volume Up + Power (on some models it causes Recovery, from where you can go to Fastboot).

The screen shows the Mi Bunny logo and the inscription FASTBOOT|

Device Manager defines the device as "Android Bootloader Interface" |

Team team. `fastboot devices` The terminal displays the serial number.|

The smartphone does not warm or vibrate (this is a sign of getting stuck)-->

How to unlock the bootloader through Fastboot

Unlocking the bootloader is a must before running custom software. At Xiaomi, this process is officially supported, but has limitations.

Step-by-step:

1. Install the official Mi Unlock utility on PC.
2. Log in to your Mi Account on your smartphone and link the device (in Settings → Mi Account).
3. Transfer your smartphone to Fastboot (see section above).
4. Connect the device to your PC and start Mi Unlock.
5. Log in to the same Mi Account as on your smartphone.
6. Press Unlock and wait until it is completed (it may take up to 30 days to wait on new models).

The smartphone screen will display progress during unlocking, and after successful completion, the inscription Unlocked will appear.

⚠️ Note: On HyperOS devices (e.g. Xiaomi 14 or Redmi Note 13 Pro)+) Unblocking can block Mi accounts for 720 hours (30 days) and it’s not a mistake, because this is how the new security system works.

Typical Fastboot Errors and How to Fix Them

Fastboot is often accompanied by errors, and let's look at the most common ones and how to fix them.

1. Error device not found or waiting for device

Reasons:

• 🔌 Faulty. USB-cable.
• 🖥️ There are no drivers. ADB/Fastboot.
• 🔒 Not included debugging USB.

Decision:

1. Try another cable (preferably original).
2. Install drivers via Android SDK Platform-Tools.
3. Turn on USB debugging and confirm your trust in the PC.

2. FAILED Error (remote: 'Flashing is not allowed in Lock State')

This error means that the bootloader is locked.Solution: Unlock it through Mi Unlock (see section above).

3.The smartphone does not respond to fastboot commands

Possible causes:

• 🔋 Battery discharge (charge to at least 30%).
• 🔄 Fastboot version is incorrect (update Platform-Tools).
• 🛠️ Damaged boot loader (reflashing via MiFlash required).

Advanced operations in Fastboot: firmware, reset, recovery

Once you log in to Fastboot, you can perform various operations via the command line or specialized utilities. Let's look at the basic ones.

1. Firmware official software through MiFlash

If the smartphone is not turned on or a clean MIUI/HyperOS installation is required:

1. Download the official firmware for your model from the Xiaomi Firmware website (choose the Fastboot version).
2. Unpack the archive in a folder without Cyrillic characters.
3. Install MiFlash and connect your smartphone in Fastboot mode.
4. In MiFlash, select a firmware folder and press Refresh (the device should appear).
5. Press Flash and wait until the cable is completed (don’t turn off!).

2. Delete FRP (Google Account) via Fastboot

If you have purchased a used smartphone and can’t sign in because of a linked Google account:

fastboot erase frp


fastboot reboot

⚠️ This method doesn't work on all models. New devices may need to be used. EDL-regime.

3.Resetting Mi Account protection

If the smartphone requires a Mi Account after resetting:

fastboot erase userdata


fastboot erase persist

Attention! This command will delete all the data on the device.

💡

Always check the version of the software before you run through Fastboot. Installing older firmware on new models (for example, HyperOS on MIUI) can lead to a bootloader lock.

Security when working with Fastboot: how not to turn a smartphone brick

Errors in Fastboot can have serious consequences, including the complete failure of the device.

• 📋 Backup before any operation. Use adb backup or third-party utilities like this. TWRP (if established).
• 🔋 Watch your battery. If your smartphone goes off during firmware, you're at high risk of a brick".
• 🔗 Use only official firmware from Xiaomi. Castom firmware may contain errors.
• 🛠️ Don't interrupt the firmware or unlock process. Even if it looks like the device is getting stuck, wait. 10-15 minute.

If after operations in Fastboot smartphone does not turn on:

1. Try logging into Recovery Mode (Loudness Up + Power) and doing Wipe Data.
2. If it doesn’t work, run the official software through MiFlash (see section above).
3. In extreme cases, contact the service center Xiaomi – some models (for example, with HyperOS) require authorized repair.

💡

If the bootloader is unlocked, don’t panic, and in 90% of cases, it can be restored through the official firmware in Fastboot or EDL (emergency mode).

Frequent questions about Fastboot on Xiaomi