To unblock a private or unknown number, you typically need to adjust your device's global call filtering settings, as individual private numbers cannot be managed like standard contacts. Because "Private," "Restricted," or "No Caller ID" calls hide their originating digits, you must toggle off the features that silence or block all such unidentified calls. Unblocking Private Numbers on iPhone
You can contact your phone service provider's customer support and ask them to unblock the private number for you. They may be able to do this remotely or provide you with instructions on how to do it yourself.
If you previously dialed *77 (Anonymous Call Rejection), dial *87 to turn it off.
📌 Private numbers that aren’t saved in your contacts will still appear as “No Caller ID” but will now ring through.
Dial *73 to deactivate Selective Call Rejection (if previously enabled for private calls)