Open File Manager And Complete Midiag.apk Installation. Then Try Again Jun 2026

Some versions of MIDIag require extra permissions. After installing:

The system needs you to manually confirm the install. Some versions of MIDIag require extra permissions

The error message is a specific instruction frequently encountered by Xiaomi (MIUI/HyperOS) users. It typically appears when a third-party tool—such as ChimeraTool or a Xiaomi Diag Enable Tool—attempts to activate Diagnostics (Diag) Mode on a device to repair IMEI, flash firmware, or perform advanced hardware testing . It typically appears when a third-party tool—such as

If you are trying to update your system, install a custom ROM, or run a specific diagnostic tool on your Android device, you might have encountered a stubborn popup that says: It is a system application used by manufacturers

To resolve the installation issue, follow these steps to manually trigger the package installer:

Before we fix it, let’s understand it. stands for Mobile Diagnostic . It is a system application used by manufacturers to test hardware components (like the microphone, speaker, or screen) during the manufacturing process or service repairs.