mantra presentation page clickable phone number

Hello, hoping you can set me in the right direction. I just set up a web page using Mantra today (love it by the way) however I wish to have a phone number that is clickable on the presentation page. I cant seem to find where i would add the code 0468648472 without it showing on the page. The editor has to much code for me to try to decipher. The page I am working on is for my son which is brisbanedetailing.com.au if you view the page you will know excatly wherei want the mobile clickable number. Only a few phones can click and call without code it would appear. Anyway thank you in advance.