The fastest way to block a text on Android

Open the text message you want to block, tap the three dots or menu icon at the top right, and select Block or Block number. The exact wording depends on which texting app you use — the default Messages app, Google Messages, Samsung Messages, or a third-party option — but all of them have this option built in. Once you block a number, texts from that sender stop appearing in your inbox and go nowhere you can see them.

If you do not have the original message, you can also block a number through your phone's Contacts app or through your texting app's settings. The process takes less than a minute either way.

Key Takeaways

  • Most Android phones let you block a number directly from a text message by tapping the menu icon and selecting Block.
  • You can block a number through your Contacts app even if you have never received a text from them.
  • Blocked numbers cannot text you, but they can still leave voicemails unless you block them in your phone settings too.
  • Different texting apps (Messages, Google Messages, Samsung Messages) have slightly different menu layouts, but all include a block option.
  • You can unblock a number at any time through your texting app or phone settings.

Blocking from a text message you already have

This is the quickest method if the unwanted text is sitting in your inbox. Open the conversation, tap the three vertical dots or menu button at the top of the screen, and look for an option that says Block, Block number, or Block contact. Tap it, and Android will ask you to confirm. Once you confirm, that number is blocked.

The exact location of the menu button varies slightly. On Google Messages, it is at the top right. On Samsung Messages, it may be at the top right or accessed by holding down the conversation. On some older Android versions, you might see a Block option appear when you long-press the message itself rather than the conversation.

After you block a number, any new texts from that sender will not show up in your inbox. Existing messages from that number usually stay in your conversation history unless you delete them manually.

Blocking a number through your Contacts app

If you want to block someone before they text you, or if you have already deleted their message, use your Contacts app. Open Contacts, find the person or number you want to block, tap it to open their details, and look for a menu icon (three dots) at the top or bottom of the screen. Select Block or Block number.

This method works even if the number is not saved as a contact. You can type or paste the number into your Contacts app, save it as a new contact, and then block it. Some Android phones also let you block a number directly from your call log — open the Phone app, find the number in your recent calls or messages, long-press it, and select Block.

Blocking through your texting app settings

Most texting apps have a blocked numbers list in their settings. Open your Messages or Google Messages app, tap the menu icon (three dots or lines), go to Settings, and look for Blocked numbers or Blocked contacts. From there, you can add a new number to your block list by typing it in or selecting it from your contacts.

This method is useful if you want to block a number you have never received a text from, or if you want to manage multiple blocked numbers at once. You can see your entire block list in one place and unblock numbers just as easily.

What happens when you block a number

When you block a number on Android, text messages from that sender stop appearing in your inbox. They do not bounce back to the sender or generate an error message on their end — the texts simply fail to deliver silently. The blocked person will not receive a notification that they have been blocked, but they may notice over time that their messages are not getting through.

Blocking only affects text messages and calls within your phone's native texting and calling apps. If someone has your number and contacts you through a different app — like WhatsApp, Facebook Messenger, or Instagram — blocking your number in Messages will not stop them. You would need to block them separately in each app.

Blocked numbers can still leave voicemails on your phone unless you also block them in your phone's call settings. Some Android phones let you block a number from voicemail separately, while others block both texts and calls together.

Unblocking a number

If you change your mind, unblocking is just as simple. Open your texting app, go to Settings, find Blocked numbers, and look for the number you want to unblock. Tap it and select Unblock. Once you unblock a number, texts from that sender will appear in your inbox again.

You can also unblock a number by opening your Contacts app, finding the blocked contact, tapping the menu icon, and selecting Unblock. After you unblock someone, they can text you immediately — there is no waiting period.

Blocking spam and unknown numbers

If you are getting texts from numbers you do not recognize, most Android texting apps have a spam filter. Open your Messages or Google Messages app, go to Settings, and look for Spam protection or Filter unknown senders. Turning this on will automatically sort suspected spam into a separate folder so it does not clutter your main inbox.

You can also block individual unknown numbers the same way you block known contacts — open the text, tap the menu, and select Block. Some phones also let you report a message as spam at the same time, which helps train the system to catch similar messages in the future.

Frequently Asked Questions

Will the person I block know that I blocked them?

No. They will not receive a notification that you blocked them. However, if they keep texting and their messages never get a response, they may eventually figure it out. Their texts will fail silently on their end without an error message.

Can I block a number if I do not have their contact saved?

Yes. You can block any number directly from a text message, from your call log, or by typing it into your texting app's blocked numbers list. You do not need to save it as a contact first.

If I block someone, can they still call me?

Blocking a number in your texting app stops text messages but usually does not stop calls. To block both texts and calls, you may need to block the number in your phone's native call settings or Contacts app instead. Check your phone's settings to see if blocking is combined or separate.

What if I block someone and then want to unblock them later?

Open your texting app or Contacts app, find your blocked numbers list, locate the number, and tap Unblock. The person can text you immediately after you unblock them. There is no waiting period or confirmation needed from them.

Does blocking someone in Messages also block them on WhatsApp or other apps?

No. Blocking in your native texting app only affects SMS and MMS messages. If you want to block someone on WhatsApp, Facebook Messenger, Instagram, or another app, you need to block them separately within that app.