Removing the phone number or hiding it (A/B) doesn’t prevent calling with Lightning Dialer. Setting Do Not Call to True is how Salesforce stops those outbound calls automatically. That’s the efficient fix. Anyone see issues with this?
Don’t think hiding or removing the number (A or B) actually stops Lightning Dialer users from starting calls, since the function is tied to record action not the field. C sets Do Not Call, which Salesforce uses to block call attempts natively. Pretty sure that’s what exam scenarios expect here, unless I missed something subtle in recent updates.