To block private calls on a Samsung Galaxy S10, you can go into the settings of your Phone app to enable a feature that blocks all unknown callers.

You can block a number on your phone so that a person or company can't call or text you from a particular number. Here's how ...

Look at your call log — some networks will show a network identifier even if the number is private. Check voicemail — callers ...

Your phone displays "No Caller ID" whenever the caller has chosen to hide their phone number from your screen. This differs from "Unknown Caller" or "Private Number," which typically point to ...