Wait for the "App Installed" confirmation message to appear.
Sometimes midiag.apk is corrupted. Verify its integrity:
Ensure you have enough storage space on your device to complete the installation.
Ensure your device has at least 1GB of free space. Android sometimes halts background installations if internal storage is critically low. If you want to troubleshoot this further, let me know: What is the brand and model of your Android device? What is the name of the main app you are trying to use? Did you see any specific error code when tapping the APK?
Sometimes, the link between the app and midiag.apk is broken. Uninstall the main app. Wait for the "App Installed" confirmation message to appear
of the hardware or navigate back to the function that was failing.
Stability:
Go to Settings > Apps > [Diagnostic App] > Storage and clear cache.
Follow these chronological steps to locate, permit, and install the file so you can get your software running. Step 1: Allow Installation from Unknown Sources Ensure your device has at least 1GB of free space
If it doesn't appear in the search, manually navigate to your folder or look inside a folder named after the primary app you are trying to use. Step 2: Enable "Install Unknown Apps" Permissions
Open the app (on Xiaomi, this is usually just called "File Manager" or "Mi File Manager"). Navigate to the Downloads folder or the APK category. Look for a file named midiag.apk or XiaomiDiag.apk . Step 2: Grant Installation Permissions
If you are still experiencing issues, try these common fixes:
How to Open File Manager and Complete Midiag.apk Installation: Step-by-Step Guide What is the name of the main app you are trying to use
If you can’t find it, use the file manager’s search function. Look for “midiag” or “.apk”.
3 minutes
If you haven't installed apps from outside the Google Play Store before, the system will block the action.