Demystifying the 'Unknown Sources' Warning
Google Android labels any application downloaded outside its proprietary Play Store as originating from an 'Unknown Source'. This is a standard operating system notification, not an indication of malicious code.
01
Download the APK FileTap the download link in Chrome browser.
02
Open Chrome Settings PromptWhen Android displays 'For your security, your phone is not allowed to install unknown apps', tap Settings.
03
Toggle Permission OnEnable 'Allow from this source'.
04
Complete InstallationTap the back arrow, click Install, and open GKK777.