Please watch Video # 2 on Website Changes
For the M3 website – This is a two part process:
First (change it in your header): Login into your site (domainname.com/wp-admin). In the left side menu, go to “Appearance > Customize”. Choose “Theme Settings”. Find the box marked “Header Aside Content”. You will see a phone number listed in this. Change it to desired phone number
Second (change it on your pages): Go back to your dashboard and click on “My Shortcodes” on the bottom left side menu. Choose “Phone” and click “Edit”. Click on the “HTML” tab along the top. In here, change to the desired phone number and press “Save”. This will change it on all pages across the entire site.