When your voice call cannot be connected due to various reasons such as the recipient’s line is busy or disconnected from the internet, you can leave a 60-second long voicemail. The recipient will receive a notification about your voicemail. To check your voicemail, go to Calls and tap on Voicemail tap at the top. Red entries indicate new voicemail. Tap on an entry and the voicemail will automatically play with a progress bar and additional options such as speaker mode and call back.