How can I print the telephone number on the Magento pdf invoice?

Printing the telephone number of the customer on the Magento pdf invoice, shipment or creditmemo is very easy with our Advanced Invoice Layout Extension.

All you have to do is go to System > Configuration > Customer Configuration > Address Templates and in the field Advanced Invoice Layout PDFs add the following variable:

{{var telephone}}

This field accepts HTML source code, i.e. you can add line breaks (<br>) or plain text as you like.