019de591-b808-7000-85fc-360c7940ce87 019de579-d09e-7440-8734-767dc34a86ee 37ba0397-89b2-47d9-830e-bc3745c042cc his phone never rang, not receiving test calls

If it’s working on other test numbers, then the outbound flow is likely configured correctly. The issue is probably tied to that specific destination number/carrier routing, caller ID permissions, geo restrictions, or Twilio/Vapi filtering on that line. I can help trace the call logs and check where the call is failing so we can pinpoint the exact cause. @Soulfeggio

I think its the "prevent unwanted calls" feature on my friend's AT&T ... sorry to bug you