To block private numbers on Samsung S20, open the Phone app, tap the three vertical dots (More options), go to Settings, tap Block numbers, and turn on the toggle labeled "Block calls from unknown numbers" (or "Block unknown/private numbers" in some regions). This is the primary documented method for Samsung S20 owners who want to stop calls from hidden or unidentified callers, helping to reduce spam and telemarketer interruptions.
How to block private numbers on Samsung S20
- Open the Phone app.
- Tap More options (the three vertical dots).
- Tap Settings.
- Tap Block numbers.
- Turn on Block calls from unknown numbers.
- On some Samsung regional support pages, the same toggle is labeled Block unknown/private numbers.
Samsung also documents adding specific numbers manually in the same Block numbers screen by typing a number and tapping Add or by choosing from Recents, Messages, or Contacts. This feature blocks calls from numbers not saved in your contacts or that otherwise appear as unknown or unspecified.
Block a number from your recent calls
To block a specific number that already called you, open the Phone app, go to the Recents list, tap the call you want to block, tap Menu, then tap Block and confirm. This method is useful for blocking a particular telemarketer or unsolicited caller directly from your call history.
What happens when you block unknown callers
Turning on "Block calls from unknown numbers" stops any call where the number is hidden, not in your contacts, or otherwise unidentified. The call will not ring on your device, and the caller receives no notification that their call was blocked. There is no option to block only private numbers while allowing other unknown numbers, the setting treats all unlisted or unsaved callers the same way, meaning the feature effectively covers what most people aim for when blocking calls and numbers.
Frequently Asked Questions
How do I unblock numbers on my Samsung S20?
Go to Phone > More options > Settings > Block numbers, then tap the red minus sign (or "Remove") next to any number in your blocked list, or turn off the "Block calls from unknown numbers" toggle to allow all private calls again.
Will a blocked caller know I blocked them?
No. When you block private or unknown numbers on your Samsung S20, the caller experiences what sounds like a normal ring or a quick busy signal, they receive no message or indication that you have specifically blocked them.
What is the difference between blocking unknown callers and blocking a specific number?
Blocking unknown callers automatically prevents all calls from numbers not saved in your contacts or that are hidden. Blocking a specific number adds only that one number to your block list, so other unknown or private callers can still reach you. You can use both methods together for more complete control.
Can I block private numbers on my Samsung S20 without blocking all unknown callers?
No. Samsung's documented settings for the S20 do not include a separate toggle for private numbers only. The "Block calls from unknown numbers" setting blocks all unsaved or unspecified callers, including both private numbers and other unknown numbers.
Can I block specific private numbers on my Samsung S20?
The built-in feature does not provide the option to block specific private numbers individually. For that, consider third-party apps.
Does this feature work if I use Verizon wireless?
The Samsung Phone app setting works independently of your carrier, but some carriers offer their own network-level call blocking. To block calls with Verizon wireless, you may need to use Verizon's Call Filter app or contact Verizon directly.
