The fastest way to block someone on Android

Open the Phone app, find the contact you want to block, tap the three dots or menu icon at the top right, and select "Block number." The contact can no longer call or text you, and their messages won't show up in your inbox. If you use a different messaging app like WhatsApp or Facebook Messenger, you'll block them separately within that app — blocking a contact in your phone's main contacts doesn't block them everywhere.

The exact steps and menu names vary slightly depending on your phone's manufacturer (Samsung, Google Pixel, OnePlus, etc.) and which version of Android you're running, but the Phone app method works on all Android devices.

Key Takeaways

  • Open the Phone app, find the contact, tap the menu icon, and select "Block number" to stop calls and texts from that person.
  • Blocking someone in your Phone app does not block them in messaging apps like WhatsApp, Messenger, or Instagram — you must block them separately in each app.
  • A blocked contact can still leave voicemails on some Android phones, and they won't be notified that you blocked them.
  • You can unblock a contact at any time by going to the Phone app's settings, finding the blocked numbers list, and removing them.

Block a contact from your Phone app

This is the main way to stop calls and text messages from reaching you. Open the Phone app (the one with the phone receiver icon), then tap the "Contacts" tab at the bottom. Find the person you want to block, tap their name to open their contact card, then tap the three vertical dots (or sometimes three horizontal lines) in the top right corner.

A menu will appear. Look for "Block number" or "Block contact" — the exact wording depends on your phone. Tap it, and you'll usually see a confirmation message saying the contact is now blocked. That's it. From now on, calls and text messages from that number won't reach you.

Block someone from a text message or call

You don't have to open the Phone app's contacts. If someone texts or calls you and you want to block them right away, you can do it from the message or call screen itself. When you receive a text, open it, tap the three dots at the top, and select "Block" or "Block number." When you receive a call, tap the decline button, then look for a "Block" or "Block number" option that appears after you hang up.

This method is faster if you don't have the person saved as a contact yet, or if you're blocking a number you don't recognize.

Block contacts in messaging apps

If you use WhatsApp, Facebook Messenger, Instagram, or another messaging app, blocking someone in your Phone app won't stop them from reaching you through that app. You need to block them separately in each one.

WhatsApp: Open the chat with the person, tap the three dots at the top right, and select "Block contact." Facebook Messenger: Open the conversation, tap the person's name at the top, scroll down, and tap "Block." Instagram: Open their profile, tap the three dots, and select "Block." Each app stores its own block list, so you may need to block the same person in multiple places if they contact you through different services.

Find and manage your blocked contacts list

To see everyone you've blocked, open the Phone app and tap the three dots in the top right corner (or go to Settings within the Phone app). Look for "Settings," "Blocked numbers," or "Block list" — the name varies by phone. Tap it, and you'll see a list of all the numbers and contacts you've blocked.

From this list, you can unblock someone by tapping their name and selecting "Unblock." Once you unblock them, they can call and text you again, and you'll see their messages in your inbox as usual. Unblocking doesn't notify them that you've unblocked them — it just removes the block on your end.

What happens when you block someone

When you block a contact on Android, they can no longer send you text messages or reach you through the Phone app. Their calls will go straight to voicemail on most phones, though some Android versions may show the call as "blocked" or simply not ring at all. The blocked person won't receive a notification saying you blocked them — the call or message will just fail silently on their end.

One thing to know: on some Android phones, a blocked contact can still leave voicemails, though you won't be notified about them. If this is a concern, you may want to disable voicemail entirely or check your voicemail settings to see if you can block voicemails from specific numbers.

Unblock a contact if you change your mind

Open the Phone app, go to Settings or the blocked numbers list (usually accessible from the three-dot menu), find the person's name, and tap "Unblock." They'll be removed from your block list immediately. You don't need to do anything else — they can now call and text you again.

If you've blocked someone in multiple apps, you'll need to unblock them in each app separately. Unblocking in your Phone app won't unblock them in WhatsApp or Messenger, for example.

Frequently Asked Questions

Can a blocked contact see that I blocked them?

No. When a blocked contact tries to call or text you, the message will fail on their end, but they won't receive a notification saying you blocked them. They may suspect it if their calls go straight to voicemail every time, but Android doesn't tell them directly.

Will blocking someone delete our text message history?

No. Blocking a contact does not delete your past conversations. Your text message thread with them will still be in your Messages app, but you won't receive any new messages from them. You can delete the conversation manually if you want to remove it.

What if I block someone but they call from a different number?

Blocking only affects the specific phone number you blocked. If the person calls from a different number, you'll still receive the call. If they keep contacting you from multiple numbers, you may want to contact your phone carrier about additional blocking options or consider reporting the harassment.

Can I block an unknown number?

Yes. If you receive a call or text from a number you don't recognize, you can block it the same way — from the call or message screen, tap the menu and select "Block." You don't need to have them saved as a contact first.

Do I need to tell the person I blocked them?

No, and most people don't. Blocking is a private action on your phone. If you want the person to know you don't want contact, you could tell them directly before blocking, but it's not required.