Step 1: Enable Unknown Sources
- Go to Settings 📱
- Tap Security or Privacy
- Turn ON Unknown Sources 🔓
⚠️ Note: This setting might be inside "Install unknown apps" on newer Android versions.
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Step 1: Open Settings 🛠️
Step 2: Go to General > Profiles & Device Management
Step 3: Under Enterprise App, tap your developer profile
Step 4: Tap Trust to confirm 🤝
Make sure "Install unknown apps" is enabled for your browser/file manager.
Clear cache of Package Installer app in Settings > Apps.
Try using a different file manager or restart your phone before retrying.