Xiaomi ADB/Fastboot Tools: Why the phone can’t be seen and how to fix it

You plugged a Xiaomi, Redmi, or POCO smartphone into your computer, ran ADB/Fastboot Tools, but instead of the expected list of devices, you see the frightening message “no devices found”? This error is one of the most common when working with firmware, unlocking the bootloader, or restoring the system, and the reasons can lie in the wrong settings of the phone, and in problems with drivers, cable, or even the version of utilities.

In this article, we’ll look at all the possible scenarios in which Xiaomi ADB/Fastboot Tools stop seeing a device, from the banal lack of debugging over USB to conflicts with antivirus or a damaged port. You’ll get step-by-step instructions with commands to check communication, a driver compatibility table, and even ways to bypass errors if the phone is in the “brick.”

Before moving to radical measures (such as reflashing through the EDL), For example, 90% of no devices errors are solved by installing drivers correctly or changing drivers. USB-Let's start with basic diagnostics and gradually move on to complex methods.

1. Connection check: cable, port and USB mode

The first thing to rule out is the physical connection issues, and even if the cable is charging the phone, it doesn't guarantee data transmission.

• 🔌 USB-Cable: Use the original Xiaomi cable or certified cable USB 2.0 (long or cheap cables often do not support data transmission).
• 🖥️ Port on PC: connect to the rear ports of the system unit (on a laptop - to the computer) USB 3.0 blue.The front ports often have weak contact.
• 📱 Regime. USB on your phone: when connecting in the drop-down menu, select File Transfer (MTP) or debugging by USB (ADB).
• 🔄 Reboot: Reboot both your phone and your computer – sometimes it resets “hang” drivers.

If the phone is charging but not detected by ADB/Fastboot Tools, try connecting it to another PC, and if the second computer recognizes the device, the problem is with your system settings (drivers, antivirus, software conflicts).

Critical moment: if the phone is in fastboot mode (black screen with a rabbit and a sign) FASTBOOT), But you can't see it anyway, so try to force it to restart by holding the power button for 10 to 15 seconds.

2. USB debugging setup and OEM unlock

Without USB debugging enabled and OEM (Original Equipment Manufacturer) unlocked, neither ADB nor Fastboot will see your device, and these options are hidden in the developer menu, which you need to pre-activate.

How to turn on:

1. Go to Settings. → The phone.
2. Click 7 times on the MIUI version (you will be notified “You are a developer”).
3. Return to the main settings menu and open Additional settings → For developers.
4. Activate: 🔧 Debugging by USB (USB debugging). 🔓 Unlocking OEM (OEM unlocking).

Connect the phone to the PC and confirm the debugging permission (pop-up on the smartphone screen).

⚠️ Note: On some Xiaomi devices (e.g. Redmi Note 10 Pro or POCO X3 Pro) option OEM Unlocking can be blocked if the Mi Account is not connected to the phone for more than 7 days, in which case you will have to wait or use bypass methods (see section 5).

After activating debugging, check the communication with the team:

adb devices

If you see the serial number of the device, the ADB works. If not, go to the next section.

3. Installation and update of drivers for ADB/Fastboot

The “no devices found” error is 80% due to the absence or incorrect operation of drivers. Xiaomi uses its own drivers for fastboot and EDL modes, which are not always automatically installed through Windows Update.

Download the official drivers from Xiaomi or use the universal Mi Flash Tool package (includes drivers for all modes).

1. Connect your phone in fastboot mode (turn off the device, then press Volume Down + Power).
2. Open Device Manager (Win + X → Device Manager).
3. Find a device with a yellow exclamation point (usually under Other Devices or COM Ports).
4. Right-click → Update the driver → Search on this computer.
5. Specify the path to the driver folder (e.g., C:\MiFlash\driver).

Bypasses:

⚠️ Note: Using informal unlock methods (e.g., through Deep Testing or Fastboot Scripts) may result in a Mi Account ban or lockdown. IMEI. On devices with Mediatek (e.g. Redmi) 10C) Incorrect unlocking often leads to hard brick (complete download failure).

If the OEM unlock is not available and the phone is not visible in fastboot, only the EDL option remains.

• 🔧 Authorized Mi Account (for devices 2022)+ year-end).
• 💻 Special cable EDL (or).
• 📦 Firmware in.mbn format for your model.

6. Conflicts with antivirus and firewall

Antiviruses (Avast, Kaspersky, Windows Defender) and firewalls often block ADB and Fastboot as potential threats, which is because these utilities gain low-level access to the system.

How to check and correct:

• 🌐 Set up firewall: Allow incoming/outgoing connections for adb (port 5037). Open the port TCP 5037 in Firewall settings.

If you are using the Mi Flash Tool, add it to the Windows Defender exceptions:

1. Open Windows Settings → Update and Security → Windows Security → Virus and Threat Protection.
2. Select Settings Management → Exceptions.
3. Add a folder with the Mi Flash Tool (e.g., C:\MiFlash).

⚠️ Attention: After working with ADB/Fastboot Prolonged shutdown of protection can lead to infection of the system, especially if you downloaded firmware from unofficial sources.

7. Alternative methods if the phone is in a “brick”

If the device is not switched on, does not respond to buttons and is not detected in either fastboot or ADB, it is likely to be in a hard brick state.

• 🛠️ Close Test Points (for Qualcomm devices).
• 📡 Use of Mi Account with Developer Rights (for new models).

For Qualcomm devices (most flagships Xiaomi and POCO):

1. Take the phone apart and find test points (usually signed by EDL or TEST).
2. Lock them with tweezers or wires.
3. Connect. USB-cable – the phone must be identified as Qualcomm HS-USB QDLoader 9008.
4. Use the Mi Flash Tool or QFil.

For devices on Mediatek:

1. Use a USB-to-UART cable to connect to the console port.
2. Launch the SP Flash Tool and select the firmware in scatter format.
3. Press Download and connect the phone (it may be necessary to close the BOOT contacts).

⚠️ Note: Self-supporting through EDL or closing the test points is insecure and can cause permanent damage to the device.

💡

Before you run your firmware through EDL, be sure to check the firmware compatibility with your model! Installing an inappropriate version can damage the Communications Module (IMEI).

8. Frequent Errors and Their Solutions (FAQ)