How to Block a Phone Number on Android

On an Android phone you block a number in the phone's own call log, in the contact card, or in the Messages app. All three routes write to the same blocked list, so it does not matter which one you use.

Blocking stops calls and texts from that specific number. It does not stop the next call from a different number, which is why the last part of this page covers the carrier-level and phone-level filters that handle spam waves.

How do I block a number from my call log on Android?

This is the fastest route when the number just called you.

1. Open the Phone app and go to the Recents or call history tab.
2. Press and hold the number, or tap it and then tap the details arrow.
3. Choose Block, or Block and report spam.
4. Confirm. The number moves to the blocked list immediately.

The wording differs by manufacturer. Samsung phones usually say Block number, Google Pixel phones say Block and report spam, and other makers use similar phrasing in the same place. If you do not see the option after a long press, tap into the call details screen instead, where it always appears.

How do I block a number that is saved as a contact?

1. Open the Contacts app and tap the person.
2. Tap the three-dot menu in the top corner.
3. Choose Block contact or Block numbers.
4. Confirm.

Blocking a contact blocks every number stored on that contact card. If someone has a mobile and a work number saved together, both go. If you only want one of them blocked, remove the other number from the contact first, or block the single number from the call log instead.

How do I block a number that has never called me?

You cannot block a number that is not in your history or contacts through the normal route, so add it first.

1. Open the Phone app and go to Settings, then Blocked numbers.
2. Tap Add a number.
3. Type the number with the area code and save it.

If your phone's dialer has no Add option, save the number as a contact with any name, block the contact, then delete the contact. The block stays after the contact is gone.

How do I block someone from texting me on Android?

Blocking from the Phone app usually covers texts as well, because the blocked list is shared. If messages still arrive, block from the Messages app directly.

1. Open Messages and open the conversation.
2. Tap the three-dot menu at the top.
3. Choose Block and report spam, or Details and then Block.
4. Decide whether to also report the message as spam, which sends a copy to the spam filter and helps flag the sender for other people.

Group messages are the exception. A blocked person's messages inside a group thread can still reach you, because the thread is delivered as a group. Leaving the group is the only reliable fix.

Where is the list of numbers I have blocked?

Open the Phone app, tap the three-dot menu, open Settings, and choose Blocked numbers. Some Samsung phones place the same list under Settings and then Block numbers. This screen is where you unblock, and it is worth checking if a person tells you their calls are not reaching you.

The list is stored on the phone and is tied to your account backup on many devices, so a number you blocked on an old phone may still be blocked after you restore onto a new one. If a call is mysteriously never arriving, check this list before you blame the carrier.

What happens to the person I blocked?

They do not get a notification. Depending on the phone and carrier, their call either rings once and stops, goes straight to voicemail, or plays a busy tone. Many Android phones still accept voicemail from blocked numbers but hide it in a separate blocked or spam section of your voicemail, so the messages exist even though you never hear them ring.

Blocked text messages are usually kept in a spam or blocked folder in Messages rather than deleted. That matters if you ever need the messages as a record.

Why do blocked calls still get through?

• The caller is using a different number each time, which is normal for automated spam calls.
• The number that reached you differs by one digit or by a missing area code from the one you blocked.
• You blocked the number in Messages only, and your dialer keeps a separate list on some older devices.
• The call arrives through a calling or messaging app rather than the mobile network. Those apps have their own block lists and ignore the phone's.
• The caller is hiding their number entirely, so there is nothing to match against.

How do I stop spam calls when blocking is not enough?

Blocking is aimed at one persistent caller. For a flood of changing numbers, use the filters that work before the call reaches your block list.

1. In the Phone app settings, turn on Caller ID and spam protection. This labels suspected spam calls on screen.
2. Turn on the option to filter or silence suspected spam calls automatically, so they never ring. Screened calls land in your call history for review.
3. Turn on blocking of unknown or private callers if you can tolerate missing calls from numbers that hide their ID.
4. Switch on your carrier's own spam filtering, which is a setting in the carrier account or its app and works at the network level.
5. Report each spam call while you block it, since the report is what improves the labels everyone sees.

Automatic silencing is effective and blunt. Clinics, schools, and delivery drivers often call from numbers you have never seen, so check your call history and voicemail regularly once you turn it on.