Zoom has temporarily disabled the telephone options for webinar attendees version 5.2.3 and plans to re-enable them in the next few weeks. In the meantime, attendees may connect to Webinar audio through the Zoom desktop client, web client, or mobile app.
Webinar hosts and panelists can still join by telephone, as well as through computer audio. All phone features for webinar attendees have been disabled for the time being, but panelists are unaffected.