How to allow the installation of applications from unknown sources on Xiaomi Redmi Note 8: the complete guide

Why Xiaomi is blocking installations from unknown sources and when to turn it off

Xiaomi Redmi Note 8 smartphones based on MIUI by default prohibit the installation of applications from third-party sources – this is a standard security measure of Android, designed to protect the device from malware. However, sometimes users need to circumvent this restriction: for example, to install.apk files from trusted sources (such as APKMirror), beta versions of programs or applications that are not available on Google Play.

It’s important to understand that disabling the lock doesn’t make the phone vulnerable in itself — the risk only comes when you install files from unreliable sources. On the Redmi Note 8 (with Android 9/10 and MIUI 12/13/14), the unlocking process is different from the standard Android interface, so many users face difficulties. In this article, we will discuss all the ways from official activation in settings to circumventing restrictions through ADB.

Before proceeding, make sure that:

• 📱 You have Xiaomi Redmi Note 8 (model ginkgo) and not another version of the Note series.
• 🔄 Version. MIUI at least 11 (older menu items may not be available).
• 🔒 You only download.apk from trusted sites (e.g. APKPure, Uptodown).

Official method: enable via MIUI settings

The easiest and safest method is to use the built-in MIUI settings. On the Redmi Note 8, the path to the option may vary depending on the shell version, but the general logic is maintained.

1. Open Settings (the gear icon on the main screen).
2. Go to the Appendix section → Application management.
3. In the upper right corner, press three dots (⋮) and select Special Access.
4. Slip on the item Installation from unknown sources.
5. In the list of applications, select the one you will install.apk through (for example, File Manager, Chrome or Mi Browser).
6. Activate the switch Allow installation from this source.

After that, you can open the.apk file through the selected application – the system will no longer block the installation. Note: in MIUI 14, the path may be slightly different (for example, Settings → Privacy → Special Permits).

Download file to device | Check hash (MD5) for viruses | Battery charge above 30% | Backup data

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Alternative method: through the developer settings

If the standard method didn’t work (for example, due to customized firmware), you can try to enable the installation through the developer mode.

1. Go to Settings. → The phone.
2. Find the MIUI version line and tap it 7 times in a row until you become a developer!
3. Return to the main Settings menu and open a new section → For developers.
4. Scroll down and find the USB Debugging option – turn it on.
5. Below, find the USB Installation (or OEM Factory Unlock) option and activate it.

This method won’t always unlock the.apk installation directly, but it can help if you connect your phone to a PC for installation via ADB.

adb install path/to/file.apk

It will only work when the debugging is on.

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If the Installation from Unknown Sources option is inactive, try temporarily disabling Mi Protect in the security settings.

What to do if MIUI does not allow the installation to be turned on

Sometimes Redmi Note 8 users find the Allow Installation switch inactive or reset immediately after switching on.

• 🔒 Security policy MIUI (For example, on corporate devices).
• 📱 Customized firmware (like LineageOS or Pixel Experience).
• 🛡️ Antivirus (e.g. Mi Security or Avast) blocks changes).

Decisions:

1. Disable the antivirus: go to Settings → Security → Antivirus and temporarily deactivate the protection.
2. Reset the application settings: in Settings → Apps click on three dots (⋮) and select Reset application settings.
3. Use a different file manager, such as Solid Explorer or FX File Manager, which sometimes bypass the limitations of MIUI.

Installing APK via PC: Bypassing MIUI Restrictions

If none of these methods worked, you can install the app via your computer using the Android Debug Bridge (ADB), which works even when your settings are locked, but requires debugging over USB.

Instructions:

1. Download and install Google’s Platform Tools (includes adb).
2. Connect the Redmi Note 8 to your PC via USB-cable (original!).
3. Enable USB Debugging (as described in the Developer Settings section).
4. Open the command line (Windows) or terminal (macOS/Linux) in the adb folder.
5. Enter the command: Adb devices Make sure the device appears in the list.
6. Install the APK command: adb install -r -t path/to/file.apk Flags -r (replace existing) and -t (test) help bypass some limitations.

If there is a mistake INSTALL_FAILED_USER_RESTRICTED, So, the device is actively constrained by the user profile level, and in this case, it's only going to help:

• 🔓 Resetting the phone to factory settings (with loss of data).
• 📲 Installation of custom recovery (e.g, TWRP) and firmware through it.

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ADB-installation bypasses restrictions MIUI, but requires an unlocked bootloader on some firmware.

Table: Comparison of Unlocking Methods

Security: How to avoid viruses when installing APK

Allowing installations from unknown sources opens the door not only to useful applications but also to malware. To minimize risks, follow the rules:

⚠️ Warning: Never install APK, downloaded from torrent trackers or suspicious sites with free download ads, even legitimate apps like WhatsApp or Spotify can be modified to steal data.

• 🔍 Check the hash sum (MD5/SHA-1) File on sites like VirusTotal.
• 📋 Check the file size with the official one (for example, the exact size is indicated on APKMirror).
• 🛡️ Use a sandbox (like Shelter app to isolate insecure people) APK).
• 📱 Install antivirus with verification APK (For example, Malwarebytes).

Signs of an infected APK:

• 🚩 The file is much smaller/more than the original.
• 🚩 Asks for permission to SMS, Calls or Device Administrator without cause.
• 🚩 Installs additional applications (for example, launcher or browser).

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Before installing an APK, create a restore point in TWRP (if installed) or back up through adb backup.

FAQ: Answers to Frequent Questions