Open your phone app, dial *87 (or 77# on some GSM networks), and press the call button. Listen for a confirmation tone or message, then hang up.
Dial *77 and press call. (You’ll hear “Anonymous Call Rejection is on.”) To turn off: Dial *87 . how to unblock private calls
For those seeking to actively identify the number, third-party applications have filled the market gap. Apps such as TrapCall, Truecaller, and Hiya function by intercepting the call process. TrapCall, specifically, utilizes a clever technical workaround: when a user receives a private call, they decline it. The app then forwards the call to a toll-free number owned by the service provider. Because toll-free lines pay for the call, they have the legal right to see the caller's phone number via "ANI" (Automatic Number Identification), a system distinct from standard Caller ID that cannot be blocked by *67. The app then sends the call back to the user’s phone with the number revealed. This represents the most definitive method for unblocking private calls for the average consumer. Open your phone app, dial *87 (or 77#
If you would like to look deeper into this, please let me know: What specific of phone are you using? Who is your cellular network provider ? (You’ll hear “Anonymous Call Rejection is on