a) Add the Phone Number field to the contact us page b) Fill in the phone number field if the user is logged in and has a phone number in their account c) print the phone number in the email
We remind you that the fee we charge is for installation and configuration of the module; where a module is a commercial offering, that fact, along with the cost of the module itself, will be made clear and we will also supply a link to the origin of that module in case you wish to purchase directly from the supplier.
Most of the free modules are available on the Zen Cart website.