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Android: How to fix the problem with “App Not Installed”

You may encounter the following error message during the installation of an Android app such as KH Taurus Mobile:
App was not Installed

This is a cryptic and confusing error message, because it does not tell you why the app was not installed. One reason for error message is that the old version of the same app may still be present as Disabled in the app list on your phone. To fix this error follow these teps:

  1. Tap Settings, then Apps, and finally the Apps Info.
  2. A list of apps in alphabetized order is displayed
  3. Scroll through this list and look for the specific app. In this example look for KH Taurus Mobile
  4. Tap on it and uninstall it.
  5. If your phone is configured for multiple users, the app must be uninstalled for all users.
  6. Now try to install the app again.

If the above method did not work, try to reboot your cell phone.  If rebooting did not solve the problem, the ultimate solution is to rest your phone to factory defaults.