How do I create a list of customers and their contact details

Welcome to the Community forum, Jill. You can easily pull your customers' names, contact info, and addresses using the Customer Contact List report.

Go to Reports > Standard Reports > enter Customer Contact List in the search bar. While the standard Phone Number field shows the office line, you can customize the filters and layout to add a Mobile Number column and see all their contact info in one place.  

Let me know if you have any other questions about managing your customer data.