“Android App Not Installed” error: Solutions
If you are getting an Android app not installed error, follow this guide to resolve it.
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“APK Not Installed” Error (Package Appears To Be Corrupt) On Android: Solutions
How to fix app “APK not installed” and the “package appears to be invalid” errors on your Android smartphone.
How to extract APK files from an Android phone
This article shows you how to extract APK files when needed so you can install them on Android and BlackBerry 10 phones and tablets.