How to send unknown callers to voicemail

We've all been there: you give your number to someone who has no idea when to quit calling you. It might be someone who wants to sell you a new car, smartphone, or even some home improvements. Perhaps it's a disgruntled ex who just can't let go.

Whomever it is, there's a way to bring back the silence you once enjoyed in the absence of their calls.

For users on Android 2.x:

How to send unknown callers to voicemail
Screenshot by Nicole Cozma

Step 1: Open the contact info for the person you want to send directly to voice mail.

How to send unknown callers to voicemail
Screenshot by Nicole Cozma

Step 2: Press the Menu button and select Options.

How to send unknown callers to voicemail
Screenshot by Nicole Cozma

Step 3: On the screen that loads, check the box next to Incoming calls (Send calls directly to voicemail).

For users on Android 4.0+ (Ice Cream Sandwich):

How to send unknown callers to voicemail
Screenshot by Nicole Cozma

Step 1: Open the contact info for the person you want to send directly to voice mail.

Step 2: Touch the three dots in the top right-hand corner to open the Settings menu for the contact.

How to send unknown callers to voicemail
Steps 2 and 3 for sending annoying callers to voice mail on Ice Cream Sandwich. Screenshot by Nicole Cozma

Step 3: Tap the box next to All calls to voicemail.

Now, every time the annoying person calls you they won't hear any rings, just your voice mail. This won't prevent them from crowding your voice-mail box with nonsense messages, but it might help them get the idea that they are either blocked or your phone is turned off.

And one other tip: be wary of unknown phone numbers after you send someone's calls to voice mail. It sounds paranoid, but there are crazy people who will begin to call you from other phone numbers to see if they can still reach you.

No one likes getting calls from unknown numbers. Not only do these calls come at the most inopportune time, but many of them are from scammers trying to steal your money. Thankfully, Apple recently implemented a new feature that will automatically block all calls from unknown numbers. Here’s how to enable the “Silence Unknown Callers” feature, and how to block all spam calls forever.

When you’ve updated your iPhone to iOS 13, you can enable the Silence Unknown Callers feature. With this new feature, your iPhone will only ring when you get a call from a number that’s in your contacts, recent calls list, or suggestions from Siri. The latter numbers are typically ones that Siri will get from your Mail or Messages applications.

When you enable Silence Unknown Callers, you won’t get a notification, but you can still see the number in your Recents list in the Phone app. The call will go directly to voicemail, so you can listen to their messages at any time.

Calls from unknown numbers will not be completely blocked, of course. Some of these could potentially be important, after all. It could also be from someone you know who has a new number. Or, it could be an emergency call from someone you know.

Apple also says that if you make an emergency call, the Silence Unknown Callers feature will be disabled for 24 hours, allowing you to receive calls from any number.

How to Enable Silence Unknown Callers on iPhone

It doesn’t matter if you’re using the new iPhone 11 or an older model, as long as you’re running on iOS 13 you can turn on Silence Unknown Callers. It is switched off by default, but it’s easy to enable it by following the steps below:

  1. Open the Settings app on your iPhone. This is the gear-shaped icon on your home screen. 
  2. Scroll down to Phone. This is the button with a green phone icon.
  3. Scroll down and find Silence Unknown Callers. 
  4. Slide the toggle switch beside it to on. You will know it is on when it is green.

How to send unknown callers to voicemail


Before you enable this feature, make sure all of your important numbers are saved to your contacts list. Otherwise, you might miss a call from someone that you know.
While the new feature should block all future spammers from, you might still get calls from any spam numbers that you have been in contact with (both calls and texts), or numbers that Siri finds in your emails.

If you want to block numbers from spammers that have already called you, you can download and install a third-party robocall blocker app. These apps will cross-reference the number calling you with a database of spam numbers, and then they will either warn you about spam numbers or block them entirely. Here’s how to stop all spammers from calling your iPhone:

How to send unknown callers to voicemail

How to Enable Robocall Blockers on Your iPhone

  1. Download and install a third-party robocall blocker app. If you don’t know where to start, check out our list of the best robocall blocker apps.
  2. Open the Setting app and tap Phone.
  3. Then, scroll down and tap Call Blocking & Identification. This option will only be enabled after you download a compatible third-party call blocking app.
  4. Tap the toggle bar to enable the apps you want to block calls. You will know they are on when the toggle bar is green. You can also reorder them to prioritize certain apps by clicking the edit button in the top right corner of your screen.

How to send unknown callers to voicemail


If you only want to block one number from calling you, check out our guide on how to block a number on your iPhone manually.

How do I send unknown callers directly to voicemail?

Here's how to send spam calls to your voicemail on an Android:.
Download the latest version of Google's Phone app..
Click on the three dots in the top right hand corner, before clicking on "Settings," and then "Caller ID and Spam.".
Click "Turn Caller ID & Spam" to turn it on..

Can an unknown caller leave a voicemail?

Turn it on, and your phone won't even ring when you get a call from an unknown number. If it's someone whose number you don't have in your address book, like a doctor, they can always leave you a message. Send robocalls and spammers right to voicemail by turning on “Silence Unknown Callers.” Here's how to set that up.

Can I send potential spam calls to voicemail?

The company's phone app for Android has a new setting that can automatically detect spam calls and send them straight to voicemail so your phone never even rings. The app now has a "filter suspected spam call" option in its settings. When enabled, suspected spam calls will be routed straight to your phone's voicemail.