The fastest way to block a number on Android

Open the Messages app (or whatever text app came with your phone), find the conversation from the number you want to block, and press and hold on it until a menu appears. Tap Block or Block number — the exact wording depends on your phone's manufacturer. That number can no longer text you, and their messages will not show up in your inbox.

If you have already deleted the conversation, open Messages, tap the three dots or menu icon at the top, go to Settings, then Blocked numbers or Spam and abuse, and add the number manually. You will need to type it in exactly as it appears, including the country code if it is international.

Some Android phones (Samsung, Google Pixel, OnePlus) also let you block directly from the phone's Contacts app. Open Contacts, find the person, tap the three dots next to their name, and choose Block number. The effect is the same either way.

Key Takeaways

  • Blocking a number on Android stops that sender's texts from reaching your inbox, though they may not know they are blocked.
  • The fastest method is to long-press a text conversation and select Block from the menu that appears.
  • If you have deleted the conversation, you can add the number to your blocked list manually through Settings.
  • Blocked numbers are stored on your phone only — if you switch devices, you will need to block them again on the new phone.
  • Blocking a number does not delete old messages from that sender; you must delete those separately if you want them gone.

Blocking from the Messages app settings

If you want to block a number but do not have an active text thread with them, the Settings route is faster. Open your Messages app, tap the three-dot menu at the top right, and select Settings. Look for Blocked numbers, Spam and abuse, or Block contacts depending on your phone brand.

Tap the plus icon or Add button, then type or paste the full phone number you want to block. Include the country code (usually +1 for the United States) if the number is from outside your country. Once you confirm, that number is blocked when ready.

You can see your full blocked list in this same menu. If you change your mind about blocking someone, tap their number and select Unblock. Unblocking restores their ability to text you, though old messages from before the block will still be hidden until you unblock them.

What happens when you block a number

When you block a number on Android, that person's text messages do not arrive on your phone at all. They go nowhere — they are not stored in a separate folder, and you will not see a notification. From your perspective, it is as if the number stopped texting you entirely.

The person sending the texts usually does not receive a notification that they are blocked. Their message may appear to send normally on their end, or they may see a delivery failure after a delay. Different carriers handle this differently, so there is no single experience for the blocked sender.

Blocking only affects text messages (SMS and MMS). If the same person calls you, the call will still ring through unless you also block them in your phone's Contacts app or call-blocking settings. Blocking does not prevent them from reaching you through other apps like WhatsApp, Messenger, or email.

Blocking spam and scam texts automatically

Most Android phones have a built-in spam filter that catches obvious scam texts before they reach your inbox. Open Messages, go to Settings, and look for Spam protection, Filter spam, or Block unknown senders. Turn this setting on if it is not already.

When spam filtering is on, suspicious messages are sorted into a separate Spam folder instead of your main inbox. You can review them there if you want, but they will not interrupt you with notifications. Google Pixel phones call this Spam and abuse; Samsung phones call it Spam protection; the feature works the same way across brands.

If a scam text makes it through the filter, you can report it as spam directly from the message. Long-press the text, tap Report spam or Report as spam, and confirm. This helps your carrier and Google improve the filter for everyone. After reporting, the message is usually deleted and the number is blocked.

Blocking numbers that keep changing

Scammers sometimes use a new number for each text to get around blocks. If you are getting repeated scam texts from different numbers, blocking each one individually is not practical. Instead, turn on your phone's spam filter (described above) and consider using a third-party app designed to catch these patterns.

Apps like TrueCaller, RoboKiller, and Nomorobo learn from millions of reported spam texts and can block entire categories of scams before they reach you. They work alongside your phone's built-in filter. read one from the Google Play Store, follow the setup steps, and it will run in the background.

You can also report the pattern to your carrier. Call the customer service number on your phone bill and describe what is happening — they may be able to block the range of numbers or investigate the source. This is especially useful if the texts are threatening or if you suspect identity theft.

Recovering if you blocked someone by mistake

If you blocked a number and now want to unblock it, go back to your Messages app settings and find your blocked numbers list. Tap the number you want to unblock and select Unblock. That person can now text you again, and you will see new messages from them in your inbox.

Unblocking does not restore old messages that arrived while the block was active. Those texts are gone. If you need to see what they sent, you would have to ask them to resend it, or check if your carrier stores message backups (most do not for consumer accounts).

If you cannot find the blocked numbers list, try these locations depending on your phone: In Messages, tap menu → Settings → Blocked numbers. Or in Contacts, tap menu → Settings → Blocked contacts. Or in Phone, tap menu → Settings → Blocked numbers. One of these will have your list.

Blocking does not sync across devices

Your blocked numbers list lives on your phone only. If you switch to a new Android phone, buy a tablet, or use a different device to text, your blocks do not transfer. You will need to set them up again on each device.

This is different from other phone settings like contacts or calendar, which often sync through your Google account. Blocked numbers are stored locally on the device for privacy reasons — Google does not store them in the cloud. If you want to remember which numbers you blocked, write them down or take a screenshot of your blocked list before switching phones.

When you get a new phone and restore from a backup, your messages and contacts come back, but not your blocked list. Go through the setup steps above to re-block any numbers you want to keep blocked on the new device.

Frequently Asked Questions

Can someone tell if I blocked them on Android?

Not directly. They will not get a notification saying they are blocked. However, if they text you repeatedly and never get a response, or if their messages seem to send but you never reply, they may suspect it. There is no way for them to know for certain from their phone.

Will blocking stop calls from the same number?

No. Blocking in the Messages app stops texts only. If you want to block calls from the same number, open your Phone app, find the number in your call history, long-press it, and select Block number. You can block the same number for both calls and texts, but you have to do it in both apps.

What if a blocked number texts me from a different number?

Your block only applies to the specific number you blocked. If they text from a new number, it will come through. If you are getting repeated texts from different numbers, use your phone's spam filter or a third-party spam app instead of blocking individual numbers.

Do blocked messages get deleted automatically?

No. Blocked messages are straightforward not delivered to your phone — they do not arrive in the first place. Old messages from before you blocked the number stay in your conversation history until you delete them manually. You have to long-press the conversation and select Delete to remove it.

Can I block a number without opening Messages?

Yes. If the number is in your Contacts, open Contacts, find the person, tap the three dots, and select Block number. You can also block from your call history in the Phone app by long-pressing a number and choosing Block. All three routes (Messages, Contacts, Phone) lead to the same blocked list.