1. From the WordPress menu select Appearance
2. Select Menus
3. Select the Footer Menu
4. Click the Select button
5. Under the Menu Structure, find the phone number and click the down arrow to expand that section.
6. Edit the phone number in both places (URL and Navigation Label) as shown in the example below
7. Click the Save Menu button to save your changes
Refresh your website and you should see the phone number in the footer has changed.