The modern smartphone has become a digital repository of our personal lives, where banking applications, correspondence and a gallery contain information that should not be shown to outsiders. POCO Often faced with the need to protect individual programs from the prying eyes, without blocking the entire screen of the device every time. MIUI Provides a built-in and powerful tool for this task that does not require the installation of third-party software.
Turning on protection for specific programs is a basic level of digital hygiene that every user needs to set up. The setup process takes only a few minutes, but guarantees peace of mind when you give a phone to a child, a colleague, or just leave it on a desk in a public place. Let's take a look at how to activate this feature and what subtleties the security menu hides.
It is worth noting that the shell algorithms may differ slightly depending on the version of Android and the modification of HyperOS, but the logic of actions remains the same for the entire ecosystem of the brand.
Built-in App Lock feature in MIUI and HyperOS
The main security tool is the App Lock module, which is integrated directly into the system application Security, which differs from installing third-party launchers or blockers in that it works at the deep level of the system, providing high stability and protection from bypassing. You do not need to search for additional programs in the Play Market store, risking downloading malicious software.
The feature allows you to select a specific list of programs that will only be allowed to access after you enter a code, pattern lock or biometric unlock. This is especially convenient for messengers like Telegram or WhatsApp, banking customers and gallery. It is important to understand that once activated, protection will be requested every time you launch the selected application, which creates an additional but necessary security barrier.
The system also offers a Hide App feature that works in conjunction with locking, making program icons invisible in the general menu. To activate hidden mode, you often need to enter a special code in the Phone application or make a certain gesture in the launcher, which is a double layer of protection that turns your smartphone into an impregnable fortress for curious glances.
⚠️ Note: If you forget the password from App Lock and do not link Mi-account or do not set up recovery issues, it will be almost impossible to restore access to blocked applications without a complete data reset.
The module is based on the principle of whitelist: by default, all applications are open, and you decide which ones to close. Flexibility of settings allows you to turn on or off protection for different programs at any time, making using your smartphone comfortable and safe at the same time.
Step-by-step instruction: setting a password for applications
To get started, you need to go to the main menu of your device’s security settings. Open the Security app, which has a green icon with a shield, or go through Settings → Apps → Application Lock. The system will prompt you to create a master password if you’re doing it for the first time.
☑️ Check before installing protection
The process of creating a security code requires care, and you will be asked to choose the type of lock: a pattern lock, PIN-code 4-6 A pattern lock is often more convenient for frequent use, as it is faster to draw than to enter numbers, but the digital code is considered more reliable in terms of entropy.
Once you create a password, the system will suggest setting up additional settings, such as fingerprint or face unlocking, which is a critical step, as it eliminates the need to enter code every time you need to respond quickly to a message. Biometrics works instantly and greatly improves the usability of the feature.
Then you'll see a list of all the programs you've installed, and you'll find the right application, like a Gallery or a Bank, and you'll have the switch in front of it in the active position, and from now on, when you try to run the program, the system will require authorization.
For those who prefer the classic path through the settings menu, the sequence of actions looks like this:
- 🔐 Open Settings and find the Application section.
- 📱 Select Application Lock (may be in the submenu).
- 🆔 Create or enter an existing privacy password.
- ✅ Activate the switches in front of the desired programs from the list.
Remember, the first password entry after the device is restarted will still be required, even if the biometrics are configured.This is a standard Android security measure that prevents data access if the device has been turned off.
Setup of biometrics and alternative entry methods
The use of biometric data is a modern security standard that makes application protection invisible to the owner, but insurmountable to outsiders. In Xiaomi devices, you can use both a fingerprint scanner built into the screen or side button, and Face ID facial recognition.
To activate fingerprint unlocking, go to lock settings and find fingerprint unlock. The system will ask you to apply your finger to the scanner several times for calibration. Once you have successfully set up, you will log in to secure applications instantly, just by touch.
What to do if your finger is not readable?
Face recognition works in a similar way, but many Redmi and POCO models use software protection rather than hardware (3D), which means that facial protection is less reliable than a fingerprint and can theoretically be bypassed with high-quality photography, although MIUI algorithms are constantly being improved to prevent such attacks.
It's important to set priorities right. You can choose which one to use first, or you can allow both, and having an alternative way of entering is critical: if your hands are wet or wearing gloves, facial recognition is the only way to quickly access the program you want.
Some firmware versions have a Smart Lock feature that analyzes geolocation, and if the phone is in a secure location, like your home, the system may not ask for a password, but you shouldn't rely on it to protect your banking data, because you don't need to use it to protect your bank data. GPS-The signal may be inaccurate or easily faked.
Application Hiding Function for Maximum Privacy
Password blocking is good, but sometimes it is necessary to completely hide the fact that a certain program is on the device. The Hidden Applications feature in Xiaomi allows you to remove the program icon from the desktop and from the menu, leaving it available only through a special input in the Phone application or through a gesture in the launcher.
To activate this function, you need to go to the settings of hidden applications (often access to them is opened through a long press on an empty desktop space or through the Settings menu). → Annexes → Hide applications. Here you can select the programs you want to make invisible.
To access hidden applications, a special code is used that is typed in the Phone application, for example, # # #123## (code can be changed by the user). After typing the combination, a hidden space opens up where all the selected programs are located, which creates the illusion that the applications simply do not exist on the device.
| Protection method | Level of security | Usability | Difficulty bypassing |
|---|---|---|---|
| pattern lock | Medium. | High. | Average (by the tracks on the screen) |
| PIN-code | High-pitched | Average. | Tall. |
| Fingerprint. | Very tall. | Very high. | Very high. |
| Hiding + Password | Maximum | Low (code needed) | Critical |
Using a combination of concealment and password creates a double bottom effect, even if an attacker unlocks your phone, he will not wear the desired icon, and if he tries to find it through a search, the system will not give results without first authorizing in a special section.
Access Restoration and Security Profile Management
Forgetfulness is human nature, and there is always a risk of forgetting a complex password or pattern, which is why MIUI requires you to link your Mi Account when you first set up your blocker, not a developer whim, but the only reliable way to restore access to your data.
If you forget your password, the "Forgot your password?" link will appear on the code entry screen. By clicking on it, the system will prompt you to send the confirmation code to the associated phone number or email, or log in through your Mi Account. After successful verification, you will be asked to specify a new access code.
If the account was not tied and the password is lost, the only option is a complete reset of the device to factory settings.This will delete all data, including photos, contacts and files, so neglecting the recovery setting is strictly not recommended.
⚠️ Note: Resetting via Recovery Mode does not remove the protection of App Lock if the Find Device feature is enabled.You can lose access to data forever if you do not remember the password from the Mi Account.
Security profile management also includes changing passwords regularly and checking active devices. Periodically go to your security settings and make sure that the list of trusted devices does not contain unknown gadgets, this is especially true if you have ever logged into your account on someone else's computer or tablet.
For advanced users, the password change feature via ADB (Android Debug Bridge) is available, but this requires USB debugging enabled and certain technical knowledge.
Frequent problems and ways to solve them
Despite the stability of the system, users can encounter a variety of bugs, and one of the common problems is when the application is not blocked or blocked but does not ask for a password, often because the system lacks permissions to work on top of other windows or access to usage data.
To fix this, go to Settings → Applications → All Apps, find Security (or Security) and check permissions. Make sure that the rights to Display on Other Apps and access to Usage History are enabled. Without these rights, the protection module will not be able to correctly intercept the launch of other programs.
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If the lock stopped working after the system update, try removing Security app updates through the App Management menu and updating it again through GetApps.
Another problem is battery discharge, and some users complain that the background work of the safety module consumes energy. In fact, modern HyperOS algorithms are optimized so that the impact on autonomy is minimal. If you see a strong discharge, check if the virus scanning process is running in the background.
There may also be a conflict with third-party launchers, and if you're using a Nova Launcher or Launcher 10, instead of a standard MIUI launcher, the application hider function may not work properly, and in such cases, it's recommended to use a standard interface or accept that you can't hide the icons, even though the launch password will work.
Sometimes, after a firmware update, security settings may reset. This is normal behavior when Android major updates. Always check the security status of important applications after a major system update so you don't get left with personal data open.