The fastest way to block a number on Android

Open the Phone app, find the number you want to block in your call history or contacts, press and hold it, then tap Block number. That's it — the number can no longer call or text you, and you won't see their messages or missed calls. If you don't see a Block option, tap the three dots at the top right and look for it there.

If the number hasn't called you yet, you can block it from your Contacts app instead. Open Contacts, find or create the contact, tap the three dots, and select Block number. The steps are the same whether you're using a Samsung, Google Pixel, OnePlus, or any other Android phone — the Phone and Contacts apps work this way across all of them.

Blocked numbers don't receive a notification that you've blocked them. Their calls go straight to voicemail (if you have voicemail set up), and their text messages disappear into a separate folder you can check later if you need to.

Key Takeaways

  • You can block a number directly from your call history by pressing and holding it and tapping Block number.
  • Blocked callers can still leave voicemail, but you won't see their calls or texts in your normal message threads.
  • Text messages from blocked numbers go to a separate folder in your Messages app that you can view anytime.
  • You can unblock a number at any time by going to Settings > Apps > Phone > Permissions, or by finding the contact and tapping Unblock.

Blocking a number from your call history

This is the most common way to block someone. Open your Phone app and look at the recent calls list. Find the number or contact name you want to block, press and hold it until a menu appears, then tap Block number. A confirmation message will pop up — tap it again to confirm.

If you don't see a Block option in that menu, your phone may have a different layout. Tap the three vertical dots (or sometimes three horizontal lines) at the top of the screen, then look for Block, Block number, or Block this caller. The exact wording changes between phone makers, but the option is always there.

Blocking a number from your contacts

If someone is already in your Contacts, you can block them without going through your call history. Open the Contacts app, find the person's name, and tap it to open their full contact card. Tap the three dots at the top right, then select Block number or Block contact.

You can also block a number this way before they ever call you. If you want to prevent someone from reaching you, just create a new contact with their number, open it, and block it. This works even if you don't know their name — you can just type the number into a new contact and block it immediately.

Where blocked messages and calls go

When someone you've blocked tries to call you, the call goes straight to voicemail (if you have voicemail enabled). You won't see a missed call notification, and the call won't appear in your call history. If they leave a voicemail, it will sit in your voicemail inbox, but you'll know it's from a blocked number.

Text messages from blocked numbers don't disappear — they go to a separate folder in your Messages app. Open Messages, tap the three dots at the top, and look for Blocked contacts or Spam and blocked. You can read old messages from blocked numbers anytime, and you can unblock someone from this folder if you change your mind.

Some Android phones also have a Spam folder in Messages that catches suspected spam calls and texts automatically. Blocked numbers and spam are kept separate, so you can manage them differently.

Unblocking a number when you change your mind

Open your Phone app and tap the three dots at the top, then look for Settings or Call settings. Tap Blocked numbers or Block list — the exact name varies. You'll see a list of every number you've blocked. Find the one you want to unblock, tap it, and select Unblock.

On some phones, you can also unblock someone by opening their contact card and tapping the three dots, then selecting Unblock number. Either method works — use whichever is faster for you. Once you unblock a number, they can call and text you normally again, and their messages will appear in your regular message threads.

Blocking unknown or private numbers

If you keep getting calls from numbers that show up as "Unknown" or "Private," you can block those too, though the process is slightly different. Open your Phone app, tap the three dots, go to Settings, then Blocked numbers. Look for an option that says Block unknown callers, Block private numbers, or Block anonymous calls. Toggle it on, and all calls from hidden numbers will be blocked.

Keep in mind that some legitimate calls come from private numbers — banks, doctors' offices, and government agencies sometimes hide their caller ID. If you turn this on, you might miss important calls. A safer approach is to block individual numbers as they call you, rather than blocking all unknown callers at once.

Using your phone's spam and call filter

Most Android phones come with a built-in spam filter that catches suspicious calls automatically. Open your Phone app, tap the three dots, then Settings, and look for Spam and call filter, Call screening, or Spam protection. Turn it on if it's not already active. Suspected spam calls will be blocked or sent to voicemail without ringing your phone.

This is different from manually blocking a number — the filter uses patterns and databases to guess which calls are spam, while blocking is something you do to specific numbers you know. You can use both at the same time. If a spam call gets through the filter, you can still block that number manually.

Frequently Asked Questions

Can a blocked number tell that I've blocked them?

No. When a blocked number tries to call you, they hear a normal ringing sound or a message saying the call can't go through — they don't get a notification that you blocked them. If they text you, the message sends normally from their end, but it goes to your blocked folder instead of your regular messages.

What happens if I block someone by accident?

You can unblock them anytime. Open your Phone app, tap the three dots, go to Settings, then Blocked numbers, find their name, and tap Unblock. Once you unblock them, they can call and text you normally again, and you'll see their messages in your regular threads.

Do blocked numbers still get my voicemail?

Yes. Blocked numbers can still leave voicemail if you have voicemail set up. Their calls go straight to voicemail without ringing your phone, but they can leave a message. You'll see it in your voicemail inbox, and you'll know it's from a blocked number.

Can I block a number that hasn't called me yet?

Yes. Open your Contacts app, create a new contact with that number, open it, tap the three dots, and select Block number. You can block a number before they ever try to reach you.

Will blocking a number stop them from texting me?

Yes. Blocked numbers can't send you text messages that appear in your normal message threads. Their texts go to a separate blocked folder in your Messages app. You can view them anytime, but they won't show up as new messages.