Adding phone number to client invoice

Can you advise what code needs to be added to get the clients phone number to come out on their invoice? We write it on at present so we can phone the, it would better if it was printed on the invoice itself.

I recently amended a template of mine to add the home phone. I added a condition in case the home phone field is blank, or {{# CurrentClient.Info.Address.HomePhone != “”}}Home {{format(CurrentClient.Info.Address.HomePhone)}}{{/end}}. Then I added another similar conditional field in case to add the mobile phone field if it is not blank.