how to block a no caller id

To block a No Caller ID (or unknown/private number) caller, here are practical methods for both Android and iPhone devices:

On Android

• Use the built-in feature to block unknown or private numbers:
  1. Open your phone's dialer app.
  2. Tap the three-dot menu icon (usually top right).
  3. Select "Blocked" or "Call block rules."
  4. Enable "Block unknown numbers" or "Block private numbers."
• If your Android version doesn’t have this option, third-party apps from the Google Play Store can block private or No Caller ID calls.

On iPhone

• Enable the Silence Unknown Callers feature:

  1. Open the Settings app.
  2. Scroll down and tap Phone.
  3. Toggle on "Silence Unknown Callers."
     This sends calls from numbers not in your contacts (including No Caller ID) directly to voicemail without ringing.

• Alternatively, use Do Not Disturb mode with Allow Calls From set to All Contacts, blocking calls from unidentified numbers.

• You can also create a fake contact named "No Caller ID" with a dummy number (e.g., 000-000-0000) and then block that contact to stop calls that show as No Caller ID.

Carrier Codes (iPhone)

• Dial *77 on your phone to block anonymous callers on some carriers like AT&T, Verizon, Sprint, or T-Mobile. This blocks all callers who withhold their caller ID at the carrier level.

Blocking No Caller ID prevents those calls from ringing or notifying you, sending them to voicemail or blocking them completely depending on the method chosen. These approaches help manage unwanted anonymous calls and regain control of your phone communication.