You can block or unblock a number on an Android phone using the built-in Phone app's "Blocked numbers" menu.

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 ...

Feeling buried under a flood of unwanted calls and texts on your iPhone? Sadly, you aren't alone, as spam calls and texts are on the rise from anyone from eager local businesses to politicians asking ...

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