The modern smartphone has become a repository of our digital lives, where sensitive data requires strong protection. Owners of the popular Redmi Note 8 model often wonder how to restrict access to certain programs from prying eyes. Fortunately, the MIUI shell offers built-in tools that do not require the installation of third-party software.
The procedure for installing protection may vary depending on the firmware version, but the basic principles remain unchanged for the entire Xiaomi ecosystem.
Before you start setting up, make sure your device is updated to the current version of the system, which ensures that all the latest security patches and data encryption features are stable.
Use of the built-in App Lock function
The main security tool is the App Lock system utility, which allows you to set a separate pin code or pattern lock to run selected programs, and you can find this module through the security menu or directly in the device settings, and the system will offer you to create a unique code other than the screen unlock code, which adds an additional layer of protection.
Once you create a password, you will be asked to select the apps that will be blocked, you can protect messengers, a gallery, bank clients or any other program that contains personal information, and the flexibility of the setting allows you to add or exclude programs from the protected list at any time.
It is important to note that when the function is first activated, the system may suggest linking a Mi Account, which is necessary to restore access in the case of a forgotten password, so it is not recommended to ignore this step.
⚠️ Note: If you forget your App Lock password and don’t link your Mi Account or ask a check question, it will be almost impossible to reset the protection without losing data.
What to do if you forget your App Lock password?
To access the blocker settings, go to Settings → Applications → Application Protection. This shows the full list of installed software with protection activity switches.
Set up biometric unlocking
Redmi Note 8 owners can make it much easier to log in to secure applications using a fingerprint scanner, which is integrated into the App Lock module and allows you to open closed programs with one touch, without entering a pattern lock every time.
To activate this option, you first need to configure the biometrics in the basic parameters of the phone, then the application protection menu will appear the "Fingerprint Unlock" switch, biometric data is stored in a secure processor module and not transmitted to the company's servers.
Using a fingerprint not only speeds up access, it also increases security, as the pattern lock can be peeked by outsiders. However, always keep in mind a backup method of entering in case your finger gets wet or damaged.
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Add the thumbprint of both hands to your biometrics settings, which will allow you to easily unlock your phone and apps, no matter what hand you hold your smartphone in.
The system also allows you to use the “Accelerated Unlock” function, which works immediately when you touch the sensor, bypassing the lock screen if the application is already running in the background.
Creating a hidden space (Second Space)
For users who want to completely isolate sensitive data, Xiaomi offers Second Space, which is the creation of a second, completely independent work environment on a single device that has its own apps, photos and settings.
Switching between the main and hidden spaces is either through a special label or, more securely, through different fingerprints, so you can set the phone so that one finger opens the normal desktop and the other one opens the secret one.
In a hidden space, you can set individual passwords and even hide the existence of a second environment, applications installed in the second space are not visible in the first, and vice versa.
☑️ Second Space setup
It is worth considering that creating a second space takes up an additional amount of internal memory, since it is actually a copy of the system libraries. On the Redmi Note 8 with its drives, this is rarely a problem, but it is still worth keeping an eye on the free space.
Blocking through Do Not Disturb Mode and Focus
While Do Not Disturb mode doesn't put a password on running apps, it effectively hides notifications and restricts access to certain content at a given time.This is useful when you give a phone to children or colleagues for an urgent call.
Newer versions of MIUI have introduced a feature called Digital Well-being, which allows you to set time limits for using specific applications, and after time, the program is blocked and requires a password to continue working.
This is more suitable for self-control or parental control than for serious data protection, but when combined with App Lock, it gives you a great result. You can limit the time you use social networks by leaving messengers available.
| Function | Level of protection | Difficulty setting up | Impact on the battery |
|---|---|---|---|
| App Lock | High-pitched | Low. | Minimum |
| Second Space | Maximum | Medium | Average. |
| Hiding applications | Low. | Low. | Absent. |
| Guest mode | Medium. | Medium | Low. |
Hiding app icons
Another layer of privacy is visual icon hiding, and MIUI has a built-in ability to hide apps from a shared menu, making them accessible only through a special gesture or entering a secret code in a search.
To activate this feature, go to Settings → Applications → Hidden Applications. Here you can select programs that will disappear from the desktop. To run them, you will need to enter a specified code in the search bar or swipe at a specific place on the screen.
This method doesn't put a password on the run if someone knows how to find the hidden, but effectively removes visual traces of the app's presence on the device. Combining icon hiding with App Lock creates a double barrier for the curious.
⚠️ Warning: Hiding icons is not data encryption, and if an attacker has access to the file system or knows about hidden applications, they can access them.
Addressing common problems
When using security features, Redmi Note 8 users may encounter situations where the system does not accept a password or the fingerprint is not working correctly, often due to software failure or sensor contamination.
If the fingerprint scanner is no longer recognizing your finger in blocked applications, try re-registering the fingerprint in the main settings, and check if the High Sensitivity mode is on, which can interfere with the work with protective films.
In cases where the application is blocked spontaneously or, conversely, not blocked, it is recommended to clear the cache of the system application "Security", which often solves problems with the incorrect operation of the protection modules.
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Regularly updating MIUI is critical for security, as updates often contain patches for vulnerabilities in the App Lock module and biometrics.