If your strategy is to call customers to follow up on emails, or start with a call, and follow up with an email, Call Tasks are going to be super useful for you.
First, build out your campaign to include a call task:
After you launch this Campaign to someone, you will see the Call task in your Command Center:
When you click Call it will open Tout Phone with the contact's phone number populated:
After you make the call, your Call Task will be automatically marked as complete to proceed through the campaign.