The out-of-the-box Hierarchy Viewer in WebCenter Spaces does not show mobile numbers of users other than the logged-in user. This is due to the fact that mobile number is grouped under a different profile than other fields displayed in the viewer. In order to enable mobile number there is a simple tweak we need to do.
Here's how to enable mobile numbers in Hierarchy Viewer Org chart:
Login to Spaces as Administrator
Navigate to Administration > Configuration > People Connections > Profile
You will notice in the Profile Attributes sections that the Mobile Phone is in Business Contact section while Phone is in Summary section
In the Profile Access section (as shown in the screenshot above), Change the “Who can view this section” for Business contact to “Authenticated users”
For Testing purposes only, change the Profile Cache Settings to have a lower timeout value.
Restart Spaces for timeout changes to take effect.