The company's modern smartphones Xiaomi, operating on the basis of shells MIUI or HyperOS, offer users a wide range of convenient features for quick data exchange. One such feature is automatic generation QR code for the Wi-Fi network the device is connected to. This allows guests to instantly connect to your hotspot by simply scanning the camera, without having to manually enter a complex password. However, in certain situations, such openness may be undesirable, especially if you value maximum privacy for your network settings or are in a crowded area.
Many users wonder if it's possible to disable this feature to hide the visual display of the password as a graphic code. The standard settings interface doesn't always provide an obvious "Disable" button, causing confusion. In this article, we'll take a closer look at how it works. security systems Android combined with Xiaomi's shell and we'll find out how to restrict access to your network data.
It is worth understanding that completely removing the function from the system is impossible without deep modification of the firmware, since it is a system component. Google And XiaomiHowever, there are effective ways to hide the code from prying eyes and prevent accidental scanning. We'll cover methods for locking the settings screen, changing access levels, and using guest mode.
How code generation works in MIUI and HyperOS
Display function QR code embedded deep into the operating system's system level Android, starting with version 10. Shell MIUI only visualizes this element in the network management menu. When you click the gear icon next to an active Wi-Fi network, the system reads the saved credentials (SSID and password) and encodes them in graphical format. This is designed to simplify the user's life, but it creates a potential information leak vector.
It's important to note that the code itself isn't constantly available. It only appears when you open a specific connection settings menu. Security protocol WPA2/WPA3 doesn't transmit this data in cleartext until authorization, but anyone with physical access to your phone's unlocked screen can read this code. This is why managing access to the settings menu is a key security factor.
System limitations Xiaomi It's impossible to completely remove the button for this menu without root access, which is standard practice for all Android smartphone manufacturers. However, we can make the process of accessing the code as difficult as possible for an unauthorized person. This is achieved through a combination of app lock settings and permission management.
⚠️ Note: The settings menu interface may differ slightly depending on the version MIUI (12, 13, 14) or new HyperOSThe arrangement of controls is sometimes changed by manufacturers to suit new designs.
Methods for restricting access through screen settings
The most effective way to prevent others from scanning your QR code is to prevent them from opening the menu where it appears. Since the code is only visible after unlocking the device and entering settings, screen lock is the first line of defense. Make sure your device has a strong pattern, PIN, or biometric security.
The second step is to set up Smart Lock or Do Not Disturb mode, which can hide notifications and settings previews on the lock screen. While this won't remove the code from the open menu, it will prevent accidental access if the phone is lying on a table. It's also useful to use Guest Mode if you lend your phone to someone for a call.
The third aspect is the use of built-in tools Xiaomi Hiding apps. You can place the Settings app in a hidden folder or use Second Space. This will create an additional barrier: even if someone picks up your phone, they won't be able to quickly find the necessary menu item for generating graphic key networks.
Using a guest profile and guest Wi-Fi
If your goal is not to hide the code from yourself, but to prevent guests from accessing the main network, then the best solution is to activate Guest network On the router. In this case, you don't need to disable the QR code on your phone. You simply create a separate network with limited access to local resources (printers, NAS storage) and generate a QR code specifically for it.
On smartphones Xiaomi There's also a "Guest Mode" or "Second Space" feature that isolates data. By switching to this profile, you can connect a guest to Wi-Fi. After the visit, you simply log out of the profile, and the connection history, including the ability to generate codes, remains isolated in the guest segment. This is a great way to separate personal space and public access.
Using a guest profile at the operating system level Android Allows you to completely separate your main network settings. A guest accessing your phone in this mode won't physically see the QR code for your main home or office network, as it may not even be saved in the guest profile or hidden by privacy settings.
☑️ Guest Access Security
Technical limitations and lack of a direct shutdown button
Many users search in the menu Settings → Wi-Fi → Manage networks A direct toggle for "Show QR code." Unfortunately, this option doesn't exist in the stock firmware. This is because the functionality is part of the system services. Google Play and the basic framework AndroidSmartphone manufacturers, including Xiaomi, Redmi And POCO, are required to comply with certain compatibility standards.
The lack of a "Power Off" button is dictated by user experience (UX) logic. The system assumes that if the user has unlocked the phone and accessed the Wi-Fi settings, they are the device's owner and have the right to see the password. Any attempt to hide this information within an active user session contradicts the core concept of the OS.
The only technical way to completely remove the ability to generate code is to use ADB commands (Android Debug Bridge) to freeze the system components responsible for this functionality. However, this requires a computer connection, drivers, and may result in system instability or voiding the warranty.
⚠️ Warning: Using ADB commands to disable system components may cause the Wi-Fi module to malfunction or prevent you from reconnecting to the network. Only attempt this if you have experience.
Comparison of security levels of protection methods
To help you choose the optimal way to secure your network, let's compare the available methods. While no single method is 100% perfect, a combination of them produces excellent results. Below is a table comparing the effectiveness of various approaches to restricting access to QR codes.
| Method of protection | Difficulty of implementation | Efficiency | Impact on convenience |
|---|---|---|---|
| Complex lock password | Low | High | Minimum |
| Guest Wi-Fi network | Average | Very high | Separate network |
| Second space | Average | High | Requires switching |
| ADB commands (freeze) | High | Absolute | Risk of system failures |
As can be seen from the table, the use Guest network When combined with a complex screen lock password, this is the "gold standard." It requires no technical intervention and provides a high level of security. The ADB command method should only be considered in exceptional cases where maximum security is required and you are willing to risk the stability of your smartphone.
What is AP Isolation?
This is a router feature that prevents devices connected to your Wi-Fi from seeing each other. Even if a guest scans the QR code and connects, they won't be able to access your files, printer, or security cameras on the local network. This is a critical security setting.
Alternative ways to hide network data
In addition to working with the QR code, it is worth considering hiding the network name itself (SSID). If you broadcast the network name as "Hidden Network," it won't appear in the list of available connections for neighbors and guests. To connect, you'll need to manually enter the name and password. In this case, the QR code becomes less critical, as it's nearly impossible to scan it blindly without knowing the exact network name (SSID).
You can also use the "Random MAC Address" feature, which is enabled by default in modern versions. Android on XiaomiThis won't hide the QR code, but it will protect your device from being tracked in public places if someone manages to connect to the network. The combination of a hidden SSID and MAC address randomization creates a powerful barrier to unwanted access.
Remember to change the password for your main Wi-Fi network regularly. If you suspect someone has photographed your QR code, changing the password in your router settings will immediately invalidate the old code. This is the easiest and most reliable way to disable an old QR code without changing your phone's settings.
FAQ: Frequently Asked Questions
Is it possible to permanently delete a QR code without root access?
It's impossible to completely remove the system's QR code generation feature without gaining superuser (root) privileges. It's part of the system framework. AndroidHowever, you can hide access to it through privacy settings and guest modes.
Is it safe to show a QR code to friends?
It's safe to show the QR code only to people you completely trust. Anyone who scans the code will gain full access to your Wi-Fi network and, without additional protection, could attempt to intercept traffic or access local resources.
What if someone has already scanned my code?
If you suspect unauthorized access, immediately change the Wi-Fi network password in the router settings. After changing the password, all previously generated QR codes will no longer work, and devices will be disconnected from the network.
Does disabling QR codes affect internet speed?
No, the presence or absence of a visual QR code in the settings menu does not affect data transfer speed, signal strength, or connection stability. It is purely an interface element.