How to block a phone number on your Android phone

After about the twentieth time that telemarketer bugs you with an “incredible deal” you’re probably ready to throw your phone out the window.
There’s a better way. With just a few steps you can banish that caller from contacting you forever. Here’s how to do it.
As a caveat, your specific dialer may look different or have some of the options placed elsewhere depending on which device you have. By and large, however, the process is pretty similar.
If it’s someone who called you recently, go to the dialer and then touch the three-dot menu button. Then touch Select. 

You can block callers through the dialer or contacts app.

Choose the offending caller and and then again touch the menu, this time choosing Add to Auto reject list. Now your phone should automatically block the number when they call again.
You can also block a caller by heading to the contacts app and making the same selection from the drop-down menu.
If you change your mind, find that same number again and choose Remove from Auto reject list. Though if you do that, get ready for more fantastic offers you’ll want to refuse.