Blocking a contact on Android stops them from calling, texting, or reaching you through most apps

When you block a contact on Android, that person cannot call you, send you text messages, or contact you through the default messaging app. The blocked contact's calls go straight to voicemail without ringing your phone. Text messages from them do not appear in your message threads. On most Android phones, you can block a contact in under a minute from your Contacts app or Phone app, and you can unblock them just as quickly if you change your mind.

Blocking works at the phone level, not the app level. This means a blocked contact cannot reach you through your phone's native calling and texting. However, they can still message you through third-party apps like WhatsApp, Facebook Messenger, or Instagram unless you block them separately in those apps. If you want to block someone completely across all communication channels, you need to block them in each app individually.

Key Takeaways

  • Blocking a contact on Android stops their calls and text messages at the phone level, but does not affect third-party messaging apps.
  • You can block a contact from your Phone app, Contacts app, or directly from a conversation thread in under one minute.
  • The blocked contact will not receive a notification that you blocked them, but they may notice their calls go to voicemail.
  • You can unblock a contact at any time using the same method you used to block them.
  • Blocking is different from muting: a muted contact can still reach you, but their notifications are silent.

How to block a contact from your Contacts app

Open your Contacts app and find the person you want to block. Tap their name to open their contact card. Look for a menu button — usually three vertical dots in the top right corner of the screen. Tap that menu button and select "Block contact" or "Block number" from the list. A confirmation message will appear asking if you are sure. Tap "Block" to confirm.

On some Android phones, the option may be labeled differently. Samsung phones, for example, sometimes show "Block contact" directly on the contact card without requiring you to open a menu. If you do not see a block option in the menu, try long-pressing the contact name itself — a context menu may appear with blocking options.

How to block a contact from your Phone app

Open your Phone app and go to your call history or recent calls. Find the number or contact you want to block. Long-press on that entry until a menu appears. Select "Block contact" or "Block number." Confirm your choice when prompted.

You can also block a contact while you are in an active call or when ready after one ends. During or right after a call, look for a "Block" or "Block contact" button on the call screen. This method is useful if you receive an unwanted call and want to block the caller when ready without leaving the call screen.

How to block a contact from a text message conversation

Open your Messages app and find the conversation with the person you want to block. Long-press on the conversation thread until a menu appears. Look for a "Block" or "Block contact" option and tap it. Some Android phones require you to open the conversation first, then tap the contact name at the top of the thread and select block from there.

If you want to block someone but keep the conversation visible, you can mute them instead. Muting silences their notifications but leaves the conversation in your message list. To mute, long-press the conversation and select "Mute notifications" or "Mute" instead of block.

What happens when you block a contact

When you block someone, their calls go directly to your voicemail without your phone ringing. They will not see a message saying they are blocked — the call straightforward fails to connect. On their end, they may hear a busy signal, a message that the call cannot be completed, or the call may ring once before going to voicemail. The experience varies depending on their phone and carrier.

Text messages from a blocked contact do not appear in your message threads. If they send you a text, it will not show up on your phone at all. They will not receive a notification that their message was blocked — it will straightforward fail to deliver or appear to send normally on their end, depending on their carrier.

Blocked contacts cannot reach you through your phone's calling and texting system, but they can still contact you through apps like WhatsApp, Instagram, Facebook Messenger, or email. If you want to prevent contact through those channels as well, you must block them separately in each app.

How to unblock a contact

To unblock a contact, open your Contacts app or Phone app and find the blocked contact's name or number. Tap on it to open their contact card. Look for the menu button (three vertical dots) and select "Unblock contact" or "Unblock number." Confirm when prompted.

On some phones, blocked contacts appear in a separate "Blocked" list within your Contacts or Phone app settings. You can access this list by opening your app's settings or menu and looking for "Blocked contacts" or "Blocked numbers." From there, you can tap on any blocked contact and select "Unblock."

The difference between blocking and muting

Blocking and muting are two different things. When you block a contact, they cannot reach you at all through calls and texts — their messages do not arrive and their calls do not ring. When you mute a contact, they can still reach you, but you will not see notifications. Their calls and messages still come through; you just will not hear a sound or see a notification badge.

Use blocking when you do not want someone to contact you. Use muting when you want to stay in contact with someone but do not want constant notifications from them. For example, you might mute a group chat that sends many messages, but you would block a number that keeps calling you with spam.

Frequently Asked Questions

Will the person I blocked know that I blocked them?

No, they will not receive a notification that you blocked them. However, they may figure it out if their calls consistently go to voicemail and their texts do not deliver. There is no way for them to know for certain through the phone system itself.

Can a blocked contact still see my profile or send me messages through apps like WhatsApp?

Yes. Blocking at the phone level only affects calls and text messages. They can still message you through WhatsApp, Instagram, Facebook Messenger, email, and other apps unless you block them separately in those apps. You will need to block them in each app individually.

What if I block someone by accident?

You can unblock them when ready using the same method you used to block them. Open your Contacts or Phone app, find their name, tap the menu, and select "Unblock." There is no waiting period or penalty for unblocking.

Do blocked contacts still show up in my Contacts list?

Yes, blocked contacts remain in your Contacts app. They are just marked as blocked. You can see them if you search for them or scroll through your list. Some phones show a "blocked" label next to their name.

If I block someone and then unblock them, will they know?

No. Unblocking is silent — the person will not receive any notification. They will only know if they try to contact you and suddenly can reach you again.