Follow these steps in order to send a conversation in private using Viber: Launch the Viber app on your mobile device, whether it's an iPhone or an Android. You may start a new conversation by going to the main chat window and tapping the button labelled "Compose New Chat" (+ icon). Your list of contacts is shown here. To access the conversation Menu, go to the contacts chat screen and press the button located in the upper-right corner of the screen.