Help On Changing Settings I updated my voicemail and with out thinking I allowed  apps that are not from google play to access my phones features causing some things to disappear, on my phone How do i change my settings back to where only things from the play store and so on can be installed?
The primary technique to reject applications other than from Play Store to install is in the Settings for Security. Make sure the setting "Unknown Sources" is unchecked. This setting normally allows 3rd party installation to occur.