Add a contact by clicking the [plus] icon at the bottom right corner of the screen.
Navigate to the [Contact Manager] screen. Select the channel you want add them to. At the bottom right side of the Contact Manager screen, hover over the [plus] icon, which turns into the [pencil] icon. Click on the button.
From there you are able to fill in the name, email address and select the group you would like them to place them in.