Fastboot on Xiaomi 7A: how to turn on the mode in 5 minutes (with photos and videos)

Xiaomi Mi A7 (also known as Xiaomi 7A in some regions) is one of the few smartphones of the brand that runs on a “pure” Android One instead of the proprietary shell MIUI. This feature affects the process of enabling the Fastboot mode, a tool without which it is impossible to unlock the bootloader, flash custom software or restore the “brick”. Unlike devices on MIUI, there is no usual menu with the rabbit logo, and the login algorithm can confuse even experienced users.

In this article, we will discuss all the ways to activate Fastboot on Xiaomi 7A – from the standard button combination to commands via ADB, as well as how to avoid typical bugs. We will focus on the nuances associated with Android One: why the smartphone may not respond to keys, how to bypass the lock OEM and what to do if the screen remains black.

What is Fastboot and Why You Need It on Xiaomi 7A

Fastboot is a low-level tool for interacting with the Android device bootloader. Unlike Recovery Mode, which has basic recovery features available, Fastboot allows you to:

• 🔓 Unlock the bootloader (a mandatory step before firmware custom software).
• 📥 Install official and unofficial firmware via fastboot flash.
• 🔧 Restore bricks (devices not enabled due to software errors).
• 🔄 Change partitions of the system (e.g., replace boot.img to obtain root rights).

On Xiaomi 7A, this mode is especially important because of the default bootloader blocked. Without unlocking, you won’t be able to install TWRP or Magisk even if you get rooted in another way.Fastboot is the only way to “resuscitate” a smartphone after a failed upgrade when the system doesn’t boot and Recovery isn’t available.

⚠️ Warning: Logining into Fastboot on Android One is different than MIUI! If you're used to the Volume Down + Power combination on other Xiaomi smartphones, on 7A it may not work. Details are in the next section.

The regime is also used to:

• 📊 Check the status of the device (fastboot getvar all command).
• 🔄 Reset protection FRP (if you forgot your Google account after resetting).
• 🔋 Diagnostics of hardware problems (e.g., battery checks via fastboot oem battery).

Official method: button combination for login to Fastboot

The easiest method is to use hardware keys. On the Xiaomi Mi A7 (7A), the algorithm is different from devices on MIUI:

1. Turn off your smartphone (press the power button and select “Switch off”).
2. Press Volume down and Nutrition at the same time.
3. Hold both buttons for 10-15 seconds until a screen labeled FASTBOOT MODE and an Android logo appear.

If the screen is black or the Recovery menu appears, it means:

• 🔄 You let go of the buttons too early (hold on longer).
• 🔋 The battery is discharged (charge the smartphone to at least 30%).
• 🔧 The device has an unofficial firmware that changes the boot logic.

Visual differences: On the Fastboot screen you will see:

• 📱 Android logo with an open "belly" and the inscription FASTBOOT MODE.
• 🔌 Connection to a PC will appear as FASTBOOT USB CONNECTED.
• 🔄 At the bottom of the screen will be a status bar (e.g., LOCK STATE - LOCKED).

Charge your smartphone to at least 50% | Connect the original USB- cable | Install ADB/Fastboot drivers on PC | Disconnect all other USB- devices from your computer--->

Alternative method: Entry through ADB

If the buttons don’t work or you prefer the software method, use Android Debug Bridge (ADB).

1. Turn on USB debugging: Go to Settings → About Phone. Press 7 times on Build Number to activate Developer Mode. Go back to Settings → System → Developer. Enable USB debugging and confirm permission.

Xiaomi 7A

adb devices

If the device appears in the list, do:

adb reboot bootloader

Once the command is executed, the smartphone will automatically restart to Fastboot, which is more reliable than the hardware method, since it eliminates errors with the buttons, but requires:

• ✅ Working system (if the smartphone doesn't turn on, ADB won't help).
• ✅ Installed drivers ADB and Fastboot on PC.
• ✅ Debugging permissions (the first connection will be a request on the smartphone screen).

⚠️ Warning: If the adb reboot bootloader leaves the device for Recovery, it has custom firmware installed that overrides the boot logic, in which case use a button combination or run the stock boot.img.

Challenges and solutions:

💡

If the ADB doesn't see the device, try another USB-port (preferably the USB 2.0 on the back of the PC). USB 3.0 ports (blue) sometimes cause driver problems.

Unlock the bootloader through Fastboot (Step-by-step)

On the Xiaomi 7A, the bootloader is locked by default. To flash custom software or get root, it needs to be unlocked. The process takes 72–168 hours (3–7 days) due to Xiaomi’s policy, but it starts with Fastboot.

1. Enter Fastboot (any of the above methods).
2. Connect your smartphone to your PC and check the connection: fastboot devices should display something like 1234567890abcdef fastboot.
3. Sign in to Mi Account on your smartphone (required!): fastboot oem device-info In the conclusion, check the lines Device unlocked: false and Mi cloud: bound.
4. Start unlocking: fastboot oem unlock On the screen of the smartphone will appear a warning – confirm it with volume buttons.

Once unlocked is confirmed, the device will automatically reset to factory settings and all data will be deleted!! This step is irreversible, so back up in advance.

Next:

• 🔄 The smartphone will restart and start counting down (72–168 hours).
• 📱 During this period, you will not be able to unlock the bootloader again.
• ⏳ Repeat the fastboot oem unlock command at the end of the term, and the lock will be removed.

💡

Unlocking the bootloader on Xiaomi 7A requires binding to Mi Account. If you are not logged in or using an account without a confirmed phone number, the fastboot oem unlock command will return the Mi Account not bound error.

Typical Fastboot Errors on Xiaomi 7A and Their Solutions

Even with the right actions, users face challenges. Let's look at the most common ones.

1. The device is not defined in Fastboot (waiting for device)

Reasons:

• 🔌 Faulty cable or port USB.
• 🖥️ There are no Fastboot drivers (especially for Windows).
• 🔋 Insufficient battery charge (less than 30%).

Solution: Install drivers via Mi Flash Tool or manually (download Google USB Driver). Try another cable, the original one from Xiaomi.

2. FAILED Error (remote: oem unlock is not allowed)

This error means that:

• 🔒 The Unlock OEM option is not enabled in the developer settings.
• 📱 The device is linked to another Mi Account.
• ⏳ It's not 7 days since the first attempt to unlock.

Solution: Enable OEM Unblocking, log in with the same account as the first attempt, and wait until the specified deadline.

3. Black screen after the command fastboot reboot

If the smartphone does not turn on after restarting from Fastboot:

• 🔋 The battery is discharged in the process (plug in the charge and try again).
• 📉 Firmware is damaged (to flash stock boot.img).
• 🔧 Incompatible version of Fastboot (update platform-tools to the latest version).

How to Get Out of Fastboot on Xiaomi 7A

To leave Fastboot mode, use one of the following methods:

• 🔄 Reboot: Press the Power button for 10-15 seconds. If your smartphone doesn't respond, plug it into charging and try again.
• 📱 The ADB command: If the device is connected to a PC, type: fastboot reboot
• 🔋 Forced reset: If the screen is frozen, remove the battery (on non-removable batteries, hold Power + Volume up to 20 seconds).

If after leaving Fastboot, the smartphone is loaded into Recovery or cyclically rebooted:

• 📉 The boot section may be damaged — re-wind it.
• 🔧 Recovery via Recovery (Wipe Data).

⚠️ Warning: If you unlock the bootloader, the first download after leaving the Fastboot can take up to 10 minutes.Do not interrupt the process - the Android logo will appear on the screen without animation.

Security: What You Can and Can't Do in Fastboot

Fastboot mode provides low-level access to the device, so errors can cause permanent damage.

✅ Permitted:

• 🔓 Unlock the bootloader (only via the official Mi Unlock Tool).
• 📥 Firmware official images from Xiaomi (with checksum checks).
• 🔧 Check the status of the device (fastboot getvar all).

❌ Forbidden:

• 🚫 Firmware for files from other models (e.g. boot.img from Redmi Note 7).
• 🚫 Use fastboot erase commands without backup.
• 🚫 Interrupting the firmware process (may result in a "brick").

Consequences of violations:

fastboot flash boot boot_backup.img


fastboot flash recovery recovery_backup.img

This will allow you to restore the device even after critical errors.-->

FAQ: Frequent questions about Fastboot on Xiaomi 7A