3.7 Voicemail notification
When someone leaves you a voicemail, a yellow dot appears on the Phone icon in the left navigation and on the Voicemail button in the dialer. The dot stays until you listen to your messages.
To listen, click Voicemail in the dialer to call your voicemail box, or open Calls > Call History > Voicemail to play messages in the browser (section 4.2).