I can use FieldServices_JobSummaryV2 as an example. I'm going to make an assumption that you have been abel to get the report open in the Report Designer and go from there.
The good news it is simple to add a field to a report. With the report open, find the field you need in the Field List
The is Work Orders don't have the Customer's phone numbers in the table. Work Orders are based
Here is the final result. ( I
I hope this helps,