How to Block No Caller ID Calls (iPhone & Android)

Are you tired of your phone ringing endlessly from blocked, private, or anonymous numbers?

Whether it's aggressive telemarketers, scammers, or a persistent ex, receiving constant "No Caller ID" calls is incredibly frustrating. Fortunately, smartphone manufacturers have finally introduced built-in tools to help you take back control of your phone.

In this guide, we'll show you exactly how to block No Caller ID calls on both iPhone and Android devices.

How to Block No Caller ID on iPhone

Apple introduced a fantastic feature in iOS 13 called "Silence Unknown Callers". While it doesn't technically "block" the call at the carrier level, it prevents your phone from ringing and immediately sends the caller to voicemail.

Here is how to set it up:

1. Open your iPhone Settings app.
2. Scroll down and tap on Phone.
3. Scroll down to the "Call Silencing and Blocked Contacts" section and tap Silence Unknown Callers.
4. Toggle the switch ON (it will turn green).

What happens now? Any call from an unknown number or a "No Caller ID" will be silenced. Your phone will not ring or vibrate. The call will be sent straight to your voicemail, and you will see the call listed in your "Recents" list.

Warning: This feature will also silence legitimate callers if their number is not saved in your Contacts list (like a delivery driver or a doctor's office).

How to Block No Caller ID on Android

Android devices differ slightly depending on the manufacturer (Samsung, Google Pixel, etc.), but most modern Android phones have a dedicated block feature for anonymous calls.

On Google Pixel (Stock Android):

1. Open the Phone app.
2. Tap the three dots (Menu) in the top right corner.
3. Tap Settings, then tap Blocked numbers.
4. Toggle on the switch that says Unknown (Block calls from unidentified callers).

On Samsung Galaxy:

1. Open the Phone app.
2. Tap the three dots in the top right.
3. Tap Settings, then tap Block numbers.
4. Toggle on Block unknown/hidden numbers.

Unlike the iPhone's feature, Android's blocking tool specifically targets hidden numbers rather than just any number not in your contacts.

Why Do People Use No Caller ID?

You might wonder why anyone uses No Caller ID in 2026. While scammers certainly use it, there are many legitimate reasons:

• Doctors and Therapists: Medical professionals often call patients from their personal cell phones and hide their caller ID to protect their privacy.
• Law Enforcement: Detectives or officers reaching out for information.
• Domestic Abuse Victims: Making essential calls without revealing their location or phone number to an abuser.

Make Private Calls Without Being Blocked

If you are trying to make a private call but you keep getting sent straight to voicemail because the recipient has blocked "No Caller ID" calls, you need a different strategy.

Instead of hiding your caller ID, you should use EzyRing.

EzyRing allows you to make internet-based calls using a dedicated VoIP number. You can protect your personal cell phone number without triggering the "Silence Unknown Callers" feature on the recipient's phone.

Frequently Asked Questions