Prevent callback option for anonymous callers

When a caller has a hidden/private number, Intercom Phone cannot receive the caller ID and therefore has no phone number available for a callback.

Today, these callers can still be presented with the option to request a callback, even though the callback cannot be completed. This creates a confusing customer experience and may lead customers to believe they will receive a callback that is technically impossible.

I would like to suggest adding a condition/check before the queue-or-callback choice is presented. If no caller ID is available (anonymous/private number), the callback option should automatically be hidden and the caller should only be offered the option to remain in the queue.

This would help avoid failed callback requests, reduce customer confusion, and create a more intuitive phone experience.