How to put a password on the Xiaomi Mi A3 apps: the full guide

The Xiaomi Mi A3, which is part of the Android One program, offers users a clean interface and timely updates, but its standard security system sometimes seems unnecessarily ascetic. Device owners often face the need to hide personal correspondence, banking applications or a gallery from prying eyes, but the usual section “Application Protection”, characteristic of the MIUI shell, is not here. This creates the illusion of the inability to protect specific programs without installing additional software, which is a common misconception.

In fact, the protection of privacy on the Mi A3 is implemented somewhat differently than in other models of the brand, requiring the user to understand the features of stock Android. We will look at all available methods: from built-in Google features to specialized utilities that will perfectly fit into the design of your Xiaomi Mi A3. You will learn not just to lock, but also to do it so as not to violate the usual scenario of using a smartphone.

It’s important to understand that the choice of method depends on your goals: whether you need a one-time lock or permanent protection with biometrics. the built-in “App Lock” feature in Android One only activates after you set a password on the device lock screen. Without this basic step, further settings will not be available, so make sure your PIN-The code or pattern lock is already specified in the main parameters of the system.

Preparation of the security system Xiaomi Mi A3

Before setting up individual programs, you need to provide a solid foundation for the security of the device itself. The lock screen is the first and most important defense line, without which any additional measures lose meaning. Mi A3 owners need to make sure that the security settings have a reliable unlock method, as this is the one that will be used to confirm access to secure applications.

To activate the basic protection go to the Settings menu → Security → Lock the screen. Here, the system will tell you to choose between a pattern lock, PIN-Android One strongly discourages using simple swipe unlocking or no protection if you plan to use data encryption features. After installing the code, the system can offer to configure biometric data, which will greatly simplify the further use of the smartphone.

⚠️ Note: If you forget the setup PIN-code or pattern lock at the stage of setting up, it can only be reset by completely resetting the device to factory settings, which will lead to the loss of all data.

In parallel with setting a password, it is recommended to activate the “Find Device” function from Google, which will allow you to remotely lock your smartphone or erase data in the event of a theft. On the Xiaomi Mi A3, this feature works stably and is integrated deep into the system, without requiring the installation of additional services from the manufacturer.

Use of the built-in application lock function

Unlike the MIUI shell, where the application protection feature is included in a separate Security menu, in the stock Android on the Xiaomi Mi A3, this tool is hidden deeper and activated on demand. To access it, you need to go to Settings → Applications and Notifications → Advanced Settings → Special Access → Access to Use. However, the easier way is through a direct search by settings.

Type the word “Block” or “App Lock” into the settings search box. The system must find the corresponding menu item. When you first start, the system protection module will ask you to confirm the lock screen password or configure a new one specific to this feature. This provides an additional layer of security: even if you know the unlock code of the phone, an attacker will not be able to log into secure applications without a second password.

Once activated, you will be presented with a list of all installed programs. You can choose those that require protection: messengers, bank clients, gallery or notes. The interface of the blocker is minimal and allows you to turn on or off protection for each application in one click.

It is worth noting that the built-in blocker on the Mi A3 works very stable and does not consume battery power in the background, as it is part of the operating system. Unlike third-party solutions, it does not require special permissions to “drawing over other windows”, which reduces the risk of data leakage. Biometric authorization is also supported, allowing you to open secure applications by fingerprint, if this option is enabled in the security settings.

Third-party solutions for maximum protection

If the built-in Android One features aren’t enough for you, or you want advanced functionality like hiding app icons or protecting against hacking through the camera, it’s worth turning to third-party developers.The security app market offers a lot of options, but for the Xiaomi Mi A3 with its pure Android, lightweight utilities that don’t overload the system are best suited.

One popular solution is AppLock, which is developed by various developers to not only set passwords, but also create fake error windows when trying to access unauthorized access, an effective psychological technique that scares off the curious, and many of these programs are able to take a picture of the face of someone who entered the wrong password and send it to the owner by mail.

• 🔒 AppLock – a classic blocker with profile support and notification hiding.
• 📸 Norton App Lock – a solution from a well-known vendor of antiviruses with a minimalist interface.
• 🎭 Calculator Lock – an application masquerading as a calculator, inside which hidden files and programs are stored.

⚠️ Note: When installing third-party blockers, carefully review the permissions requested.The app should not require access to your contacts or microphone without an explicit need for its operation.

When using third-party software, it is important to properly configure the work in the background. On the Xiaomi Mi A3, the energy saving system can aggressively unload such programs from memory. To avoid situations where the protection suddenly stops working, go to the battery settings, find the blocker installed and select the “No Limits” mode.

Setting up the Guest profile and guest mode

For situations where you give a phone to a friend or child but don’t want them to see your personal data, Android One has a Guest Mode feature that doesn’t just block individual apps, but creates a complete, isolated environment with a clean desktop. On the Xiaomi Mi A3, this feature is activated through a quick settings panel or user menu.

To switch to guest mode, lower the notification curtain twice, click on the user avatar in the corner and select Guest. The system will create a temporary profile that will not have your photos, messages and browser history. All applications will be available only those that are preinstalled or downloaded in this profile, and after leaving guest mode, all data can be automatically deleted.

Using a guest profile is a more radical but also more reliable way to protect yourself than a simple password for an app, which ensures that even with access to a phone, an outsider will not be able to accidentally delete important system files or change critical system settings, especially if children are using a smartphone.

Biometric authorization for applications

The Xiaomi Mi A3 features a built-in underscreen fingerprint scanner, making biometrics easy and fast to use. Many modern applications, especially banking and instant messengers, support fingerprint or facial recognition login, an alternative to setting a separate password. This not only speeds up access, but also increases security, since biometrics are stored in the secure TrustZone module of the processor.

To activate this feature, you need to go to the settings of each particular application. For example, in Telegram this is the Settings section → Privacy → Password, where you can enable fingerprint unlock. In banking applications, this option is usually offered the first time you log in after installation. The use of biometrics on Android One is implemented at the system level, which guarantees a high response rate.

In some jurisdictions, you may be required to unlock your device by fingerprint, but you may not need to share your password, so a combination of biometrics for quick access and a complex graphical key for logging into security settings are recommended to store critical data.

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Use the Smart Lock feature in security settings so that the phone doesn’t require a password when it’s in a trusted place, such as at home, but blocks apps when going out.

Frequently Asked Questions (FAQ)

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The combination of Android One’s built-in protection and biometric authorization ensures the optimal balance between data security and the usability of the Xiaomi Mi A3.