Block a Single Number Right From Your Call Log

The fastest way to stop calls from one person is to block them directly from your recent calls list. Open the Phone app, find the number or contact you want to block, press and hold it until a menu appears, then tap Block number. Samsung will confirm the block is active. That person can still leave voicemails, but you won't see missed call notifications from them.

If you want to block someone but keep their voicemails, this method works well because it's reversible — you can unblock them the same way by holding their number and selecting Unblock. The blocked person won't know they're blocked; calls straightforward won't ring through to you.

Key Takeaways

  • You can block a single number by holding it in your call log and selecting Block number from the menu that appears.
  • The Contacts app lets you block someone before they ever call by opening their contact card and tapping Block contact.
  • Samsung's built-in spam filter can automatically block suspected spam and robocalls without you having to identify each one.
  • Blocked callers can still reach your voicemail, but you won't receive notifications that they called.
  • You can view and unblock numbers anytime by going to Phone settings and finding your block list.

Block Someone From Your Contacts

If you have someone saved in your contacts and want to block them, open the Contacts app and find their name. Tap their contact card to open their full details, then scroll down and tap Block contact. A confirmation message will appear; tap Block again to confirm. This method works the same way as blocking from your call log, but it's useful when you want to block someone before they call you.

Blocking from Contacts is also clearer if you're managing multiple numbers for the same person — you can see their full contact information and make sure you're blocking the right entry.

Turn On Spam and Robocall Filtering

Samsung phones include a built-in spam filter that can automatically block suspected spam calls and robocalls without you having to block each number individually. Open the Phone app, tap the three-line menu icon (hamburger menu) at the top, then go to Settings. Look for Spam protection or Call blocking — the exact name depends on your Samsung model and Android version.

Once you find the spam filter setting, toggle it on. You can usually choose whether to block suspected spam silently (calls won't ring through) or send them to voicemail. Some versions also let you block calls from numbers not in your contacts, which stops unknown callers entirely. This setting catches many unwanted calls automatically, though it's not perfect — some spam still gets through, and occasionally legitimate calls get flagged by mistake.

View and Manage Your Block List

To see all the numbers you've blocked, open the Phone app and tap the menu icon, then select Settings. Tap Block list or Blocked numbers — again, the exact wording varies by model. You'll see every number you've manually blocked listed here.

From this list, you can unblock any number by tapping it and selecting Unblock. You can also block new numbers directly from this screen on some Samsung models by tapping an add or plus icon. If you've blocked someone by mistake, this is where you come to fix it.

Block Calls From Unknown Numbers

If you're getting calls from numbers not saved in your contacts, you can set your phone to send all unknown callers to voicemail. In the Phone app settings, look for an option called Block unknown, Block calls from unknown numbers, or Unknown caller blocking. Turn this on, and calls from any number not in your contacts will go straight to voicemail.

This is a strong setting — it means friends, family, and businesses you don't have saved won't be able to reach you by phone. Use it only if you rarely receive calls from new numbers, or if you're willing to check your voicemail frequently. You can always turn it off if it becomes too restrictive.

Use Do Not Disturb to Silence Calls Without Blocking

If you want to silence calls without permanently blocking anyone, Do Not Disturb is a gentler option. Swipe down from the top of your screen twice to open the full quick settings panel, then tap Do Not Disturb to turn it on. Calls will go straight to voicemail, but the caller won't know they're blocked — it looks like you're just unavailable.

You can customize Do Not Disturb to allow calls from specific contacts (like family) while blocking everyone else. Open Settings, search for Do Not Disturb, and tap Allow exceptions or Allowed contacts. Select which contacts can still reach you. This is useful when you want temporary silence without the permanence of blocking.

Frequently Asked Questions

Will a blocked person know they're blocked?

No. Their call will go to voicemail, and they won't receive a message saying they're blocked. From their perspective, it looks like your phone is off or you're not answering. They can still leave voicemails, which you won't be notified about.

Can I block a number that isn't saved in my contacts?

Yes. Hold the number in your call log and select Block number, even if that person isn't in your contacts. You can also block unknown numbers as a group using the Block unknown setting in Phone settings, which sends all unsaved numbers to voicemail.

What's the difference between blocking and Do Not Disturb?

Blocking is permanent for that number until you unblock it. Do Not Disturb is temporary and affects all incoming calls unless you allow specific contacts. Blocking is better for unwanted callers; Do Not Disturb is better when you need quiet time but want to stay reachable to certain people.

Can I block text messages from the same number?

Blocking a phone number blocks calls from that number, but text messages may still come through depending on your Samsung model and Android version. To block texts, open the Messages app, find the conversation, hold it, and select Block if that option appears. Some Samsung phones block both calls and texts together; others require separate blocking in each app.

How do I unblock a number I blocked by mistake?

Open the Phone app, tap the menu, go to Settings, then Block list. Find the number you want to unblock, tap it, and select Unblock. The number is when ready unblocked and can call you again.