Activation of the debugging mode through USB-The interface is a fundamental action for any advanced user of the Android ecosystem, and Xiaomi smartphones are no exception. This feature gives access to deep diagnostics of the device, allows you to install applications directly from the computer, transfer data using the tool. ADB Without this mode, low-level interaction with the operating system is impossible, which limits the ability to customize and repair the software.
Owners of MIUI devices and the new HyperOS often face additional layers of protection that hide the necessary switches from inexperienced eyes. The system requires a certain sequence of actions, including activating a hidden developer menu and, in some cases, confirming through a SIM card or Mi Account. Understanding these nuances is critical, since the standard Settings-About-Phone path may not give the expected result without knowing the specific steps for current firmware versions.
In this guide, we will take a look at the entire process, from unlocking the developer menu to troubleshooting when the computer can’t see the smartphone, how to set up security resolutions to keep the system from blocking the connection, and what commands are needed to verify the connection, which is relevant for most modern models, including the Redmi Note series, Poco and the flagship Mi.
Pre-training and system requirements
Before you start changing system parameters, you need to make sure that all the components are available for a successful connection. USB-A cable that can transmit data, not just charge the device. Cheap charging-only cables are a common cause of failure when trying to communicate with a computer.
The appropriate drivers must also be installed on the computer. For the Windows operating system, this is especially true, since without ADB and Fastboot drivers, the device can be displayed as an unknown gadget or simply a power source. It is recommended to download the official Platform Tools package from the Android developer site, which contains all the necessary executable files.
☑️ Pre-launch check
Remember to back up important data. While enabling debugging is safe in itself, subsequent actions such as installing custom recovery or modifying system files carry risks. Enabling debugging over USB automatically allows the computer full access to the smartphone file system when confirmed on the screen, which is a potential vulnerability when connecting to someone else's PC.
Activate the developer menu on MIUI and HyperOS
The first and mandatory step is to unlock the hidden settings section known as "Developers For." Unlike pure Android, Xiaomi's shell requires additional security confirmations, the process begins with moving to the main settings of the device, where you need to find the "About Phone" item.
Inside this section is the version information. You'll need to find the line "Version". MIUI" or "Version." OS" and press it fast. 7-10 After a few clicks, you'll see a pop-up notice telling you how many clicks you have left before you activate the mode. PIN-code or pattern lock, the system will request its input to confirm the actions.
- 📱 Open the Settings app on the main screen.
- 🔢 Go to About Phone (top of the list).
- 👆 Quickly press 7 times on the field version MIUI or OS.
- 🔓 Enter the screen unlock password if a request appears.
- ✅ Wait for the message, You became a developer!".
Once you've done this successfully, the main settings menu, usually in the "Advanced" section, will have a new "Developers" item. This is where all the tools for debugging, logging and managing system processes are concentrated. If the item doesn't appear, try restarting your smartphone and checking the "Advanced Settings" section.
Configuring the debugging and security parameters
After you enter the developer menu, you will see a list of dozens of options, many of which are better not to touch without understanding their purpose. USB". Before it is activated, the system will issue a warning about the risks associated with access to the data.
However, on the modern versions MIUI 12/13/14 And HyperOS isn't enough. There's additional security that blocks application installation and access. ADB through USB, If the relevant security settings have not been changed, you need to find the "Installation through" item. USB" The system may require you to enter a phone number to receive it. SMS-Confirmation code and log in to Mi Account.
⚠️ Note: To activate the "Installation through" USB" SIM-The card must be installed in the smartphone, and the device must have Internet access. Without this, the switch will be gray and inactive.
It is also recommended to disable the option"USB-Debugging (Security settings)" if it is active.This feature requires each connection to be confirmed ADB By pressing a button on your smartphone screen, which is convenient for protection but inconvenient for automated scripts. If you plan to use the phone for constant development or frequent flashing, disabling this restriction will save time.
Why does Xiaomi require an account?
Connection to a computer and check connection
Once you've set up everything on your smartphone, you can go to a physical connection. Connect your phone to your computer with a cable. There's a dialog box on your mobile device that says, "Allow debugging by USB?". It'll be displayed. RSA-You need to tick "Always allow from this computer" and click "OK".
To check the success of the connection, open the command prompt or terminal on your computer in the folder with the ADB tools. Enter a command for a list of connected devices. If everything is configured correctly, you will see the serial number of your device and the status of the device.
adb devicesIf you see a blank line or unauthorized status instead of a list of devices, check the cable and drivers. Windows Device Manager should not have unknown devices with yellow exclamation marks. Sometimes switching USB mode in the notification curtain from Charge Only to File Transfer (MTP) helps.
| Status at ADB | Meaning | Action. |
|---|---|---|
| device | The device is connected and ready to go. | You can run commands. |
| unauthorized | Requires confirmation on the phone screen | Check the smartphone screen and press “OK” |
| offline | Failure of communication or drivers | Reconnect the cable, check the drivers |
| (empty) | The computer can't see the phone. | Replace the cable, check USB ports |
Solving common problems and errors
Even with strict follow-up, technical difficulties can occur, and one of the common problems with HyperOS is blocking debugging if the phone is not installed. SIM-map or Mi Account login with device search enabled, security reads these parameters and blocks access to the port for debugging.
Another nuance is antivirus software on the computer: Aggressive security solutions can block adb.exe, considering it potentially dangerous, in which case you need to add a folder with platform tools to exclude the firewall or antivirus. It is also worth checking whether the energy saving system is shutting down. USB-port.
- 🔄 Reboot. ADB: If the connection is lost, enter adb kill-server and then adb start-server.
- 🔌 Change the port: Try connecting the cable to the port USB 2.0 instead of 3.0, sometimes it solves the problem of compatibility.
- 🛡️ Lockdown MIUI: Make sure the developer settings include the “Do not turn off the screen” item when charging so that the phone does not go into deep sleep.
If nothing works, try turning on USB Debugging and turning it off again, which will reset RSA permissions for all computers. Then, when you connect to your PC, reconfirm access on your smartphone screen. In rare cases, resetting all network settings in the system recovery menu helps, but this is a last resort.
💡
Use the original cable kit or certified counterpart. Cheap cables from markets often have only two veins to power and can't physically transmit data no matter how much you set up the software.
Security and completion of work with the debugger
Using debugging mode gives full rights to the device, making it vulnerable when connected to public charging stations or other computers. An attacker can copy your data or install malware without your knowledge if the device is unlocked. So keeping debugging on is not recommended at all times.
After you've completed all the necessary procedures (install applications, uninstall logs, firmware), you'd better deactivate debugging mode. You just have to switch the main switchboard in the developer menu to off. ADB-connection and closes access to system commands from the outside.
⚠️ Warning: Never leave debugging mode on when you leave your phone unattended in a public place. USB-A port at an airport or cafe can cause data to be compromised even if the screen is locked if you have previously confirmed access to that PC.
Remember that modifying system partitions via ADB can result in loss of warranty or “bricking” of the device if you do not perform the correct actions. Always double-check commands, especially those that start with adb shell rm or fastboot flash. A single character error can remove critical partitions of the bootloader.
💡
USB debugging is a powerful tool that turns a smartphone into an open system: Use it consciously, check your connected computers, and always turn off the mode after use.