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 ...

You've likely received unwanted calls during busy hours of the day. Instead of permanently silencing your phone, you block the phone number to prevent the person on the other end of the line from ...

With so many spam calls nowadays, people block so many phone numbers every week. Or sometimes, you might just have a friend or family member that won’t stop contacting you even when you’ve asked them ...