Open File Manager And Complete Midiag.apk Installation. Then Try Again

Step 1: Enable Installation from Unknown Sources

Go to Settings on your Android device.
Navigate to Security (or it might be listed under "Lock screen and security" or similar, depending on your device).
Look for "Unknown sources" or "Install unknown apps" and enable it. You might need to toggle a switch or select "Allow" for your file manager app specifically (e.g., Google Files, ES File Explorer).

Sound familiar?

C. Custom ROMs or Rooting

If the device has been modified, the system may be missing the certificate required to silently install the APK, forcing the user to do it manually via the file manager. Step 1: Enable Installation from Unknown Sources

Open your file manager (not the browser, not the downloads UI).
Navigate to the exact folder.
Tap the .apk file directly.
Complete the installation.
Then try your original action again.

Allow from this source: I had to toggle “Allow install from unknown apps” for the file manager itself (one-time permission).
Review permissions: MIDIAG asked for USB and audio access—legitimate for its use case.
Tap “Install.”

To complete the installation of midiag.apk (often associated with Xiaomi Device Diagnostics), follow these steps to locate the file and grant the necessary security permissions. 1. Locate the APK File Go to Settings on your Android device

Privacy & Permissions: