Once you have Circle Go installed, here's how to make sure it properly installed:
Confirm Installation of the Circle Go Profile
If you are concerned that the Circle Go installation process may not have been successful, the first thing to check on is whether the admin management profile is visible in your settings.
To check on this, open your Android Settings app and go to Security >> Device Administrators. Confirm that the MyCircle management profile is installed there.
THE KEY ICON
Because of the nature of the Circle Go implementation on Android, you should always notice a "key" icon in your device’s status bar. This indicates that Circle Go is installed and managing your phone's internet activity.