In the digital age, the smartphone has become our second self, storing correspondence, personal photos and financial information. WhatsApp remains the most popular messenger, and access to it is often equated with access to the owner’s innermost secrets. For users of Xiaomi, Redmi and POCO smartphones, the issue of data protection is especially acute, as the MIUI shell (and the new HyperOS) offers unique but not always obvious security tools built right into the system.
Many people mistakenly believe that setting a password requires third-party programs from Google Play that can collect data or display ads. However, Xiaomi engineers have provided native functionality that works more stable and does not consume battery in the background. The built-in Application Protection feature in MIUI works at the system level, making it burglarous even when trying to reboot the device. In this article, we will discuss in detail all ways to restrict access to the messenger.
Consider not only standard locking, but also advanced techniques like creating a Second Space or using a Guest mode, which allow you to completely hide the presence of an application or create a copy of it with a separate correspondence history, and you will learn to adjust biometric protection through a fingerprint or Face ID so that it takes a fraction of a second to unlock, while remaining reliable.
The standard application protection function in MIUI and HyperOS
The first and most reliable way is to use the built-in security tool that is pre-installed on every Chinese brand device. You don't need to download anything, just activate the system module correctly. To start, open the standard Security app (green icon with a shield), which is the control center for all the security mechanisms of your Xiaomi.
Inside the menu, find a section that could be called App Protection or App Lock. The system will prompt you to create a separate pattern lock or enter a digital key. PIN-This is an important detail: even if someone knows your primary password from your phone, they won't be able to log into locked apps without a second layer of protection.
Once you have the code installed, you will be asked to select the apps to lock, search the WhatsApp list and put the switch in the active position, from now on, every time you run the messenger, the system will require confirmation, and you can also set a lock timer, for example, request a password immediately after you leave the application or only after 1 minute of inactivity.
💡
Use a complex pattern lock from 6-8 point-and-simple PIN-code 4 numbers, as it is much more difficult to see from the side.
It's worth noting that new versions of the HyperOS shell may have slightly different interfaces, but the logic remains the same: the function is integrated deep into the core of the system, so you can't get around it by simply removing the locking app, which ensures a high level of privacy for your data.
Set up biometrics for quick access
Entering a password can be tedious every time, especially if you use a messenger a lot. Fortunately, modern Xiaomi and Redmi smartphones feature fast fingerprint scanners and facial recognition modules. The regular app protection feature supports biometrics, allowing you to open WhatsApp with a single touch.
To activate this option, go back to the Application Protection settings. In the upper right corner of the screen (or in the settings menu inside the section), find the gear icon. There will be "Use fingerprint" or "Use face unlock." Activate the method you want, the system will warn that biometrics are stored in a secure circuit of the processor and not transferred to third parties.
- 👍 Speed: Your fingerprint unlocks your chat faster than you blink.
- 👍 Convenience: No need to remember complex combinations of numbers or draw keys.
- ⚠️ Limitation: After a smartphone reboot, the first sign-in always requires the primary password or pattern lock to be entered for security reasons.
It’s important to understand the difference between unlocking your screen and unlocking apps. You can set your smartphone to open WhatsApp only by fingerprint, even if the phone itself is unlocked in the face, which creates an additional layer of multi-factor authentication for your personal data.
Creating a Second Space for Total Isolation
If you don't have a standard lock, and you want to completely hide the fact of using the messenger or to separate work and personal correspondence, use the "Second Space" feature, which is a unique feature of MIUI, which creates a virtual clone of the system inside your phone with its applications, photos and accounts.
To activate, go to Settings → Additional Features → Second Space. Click Enable. You will be asked to create a separate password or set up a fingerprint login. Key point: you can assign different fingerprints to different spaces. You can tap one finger, the main desktop opens, the other hidden space with a secret WhatsApp.
In the second space, you re-install WhatsApp, register a new number (or use cloning if supported), and use it regardless of the main system, and for the outsider who took your phone, that space simply doesn't exist until they type in a special code or put the right finger on it.
⚠️ Note: When you delete the Second Space, all the data inside it (photos, correspondence, contacts) will be permanently destroyed.
This method is ideal for those who want to completely fence off from digital noise or need maximum privacy, switching between spaces through the notification panel or a special widget on the desktop, which can also be hidden.
Use of Guest and Guest Access Mode
Another effective way to hide access to apps is to use the Guest mode. Unlike the Second Space, which creates a full copy of the system, the Guest mode simply clears the desktop of your widgets and applications, leaving only the standard set.
To activate this mode on Xiaomi, lower the notification curtain and find the user profile icon (usually in the form of a human silhouette).Select "Guest." In this mode, WhatsApp will not be available, as it is only installed in the owner's profile. This is handy when you give the phone to a child to play or a friend to make a call, but do not want them to dig into your files.
But there's a caveat to this method: it doesn't put a password on the app itself, it hides access to it by changing the profile, and if the user knows how to switch back to the Owner profile, the protection will be removed, so it's good for quick protection against accidental access, but not from targeted hacking by a knowledgeable person.
How is the second space different from the guest mode?
Hidden chats inside WhatsApp itself
Not to mention, WhatsApp itself also develops privacy tools that are independent of the phone shell, and its Locked Chats feature allows you to remove specific conversations from the list and protect them with a separate code or biometrics.
To take advantage of this, open WhatsApp, go to settings or click three dots in the corner, select Secure Chats (or Hidden Chats). Enable the feature and set a password. Now, when you move the chat to hidden, it will disappear from the shared feed and will only be accessible through a special login in the privacy settings.
The advantage of this method is cross-platform: if you put a password on a chat in the app, it will remain hidden even if you log in to your account from another device or if someone accesses notifications on a locked screen (if you set the privacy of notifications correctly).
| Protection method | Level of secrecy | Convenience | System dependency |
|---|---|---|---|
| App Lock (MIUI) | Low (seeing icon) | High. | Tall. |
| Second space | Maximum | Average. | Tall. |
| Hidden Chats (WA) | Medium (hiding chats) | High. | Low. |
| Guest mode | Medium (hiding everything) | Low. | Tall. |
Configure privacy of notifications and previews
Even if you have a password on the app, the text of the message can be lit up on a locked screen, and to avoid this, you need to properly configure the notification display, a critical step that Redmi and POCO users often forget about.
Go to Settings → Notifications and Status bar → Lock screen. Make sure you check the “Show Content” box for the unlocked device only, or turn off the WhatsApp preview completely. In this case, the screen will simply say “WhatsApp: 1 new message”, and you will only be able to read the text after successful authorization.
Also check the settings inside the messenger itself: Settings → Privacy → Lock screen. Make sure there is a ban on displaying details. Dual protection (system and internal) ensures that your correspondence will remain secret even if the phone is unlocked on the table.