If you need a longer pause, tap the Pause button two or three times. If you don’t know how long to pause, use the Wait symbol (semicolon). This article explains how to automatically dial an extension ...

You can add contacts on Skype by opening your Contacts list and searching for a name, phone number, or email address. Here's how to do it.

You can add new contacts to WhatsApp manually from the Chats tab or you can scan someone's QR code within the app.